BỆNH ĐỐM ĐEN – ROSE BLACK SPOT TRÊN CÂY HOA HỒNG – AGRICULTURE
BỆNH ĐỐM ĐEN - ROSE BLACK SPOT TRÊN CÂY HOA HỒNG
Cây Cảnh - Bonsai

BỆNH ĐỐM ĐEN – ROSE BLACK SPOT TRÊN CÂY HOA HỒNG

Posted On June 7, 2017 at 12:00 pm by / 331 Comments

BỆNH ĐỐM ĐEN – ROSE BLACK SPOT TRÊN CÂY HOA HỒNG


Bệnh đốm đen (Rose black spot) là một trong những bệnh quan trọng và phổ biến trên hồng. Bệnh gây hại trên lá và hoa của nhiều giống hồng. Triệu chứng bệnh đầu tiên xuất hiện ở các lá già, sau đó lan dần đến các lá non, đọt và nụ hoa. Bệnh đốm đen rất thường gặp ở các vườn hồng ở Sa Đéc.

Triệu chứng bệnh và nấm Marssonina rosae gây bệnh đốm đen trên hồng (A & B: Triệu chứng bệnh trên hoa và lá; C: Đính bào đài; D: Bào tử nấm Marssonina rosae)

Phòng trị bệnh đốm đen trên hoa hồng (Rose black spot) (2)

Rose-black-spot-225x300

Bệnh càng nặng trong điều kiện hồng trồng dầy, bón nhiều phân đạm cho cây hoa hồng, cây trồng trong điều kiện không được thông thoáng, không thường xuyên vệ sinh thu gom và tiêu hủy lá bệnh và do sử dụng cây bệnh để nhân giống. 

Bên cạnh đó, điều kiện ẩm độ cao vào mùa mưa, thời tiết nhiều sương mù và có nhiều giọt nước đọng lại trên lá hồng do tưới nước vào buổi chiều tối cũng tạo điều kiện thuận lợi cho bệnh lây lan và phát triển mạnh trên cây hồng.

Nguyên nhân gây bệnh đốm đen trên hoa hồng:

Bệnh được xác định do nấm Marssonina rosae gây ra (Agrios, 2005) thuộc lớp nấm bất toàn. Khi điều kiện thuận lợi ẩm ướt và nhiệt độ từ 15-25°c, bào tử mọc mầm trong vòng 9 giờ, hình thành đĩa áp và vòi xâm nhiễm trực tiếp qua biểu bì (Smith và ctv., 1988).

Nhiệt độ thích hợp cho nấm gây bệnh đốm đen phát triển 22-26°C (Agrios, 2005). Nấm lưu tồn trong bộ phận bị bệnh và lây lan qua sự tiếp xúc giữa các lá hồng và đặc biệt là nước mưa, nước tưới hoặc có thể do côn trùng (Smith và ctv., 1988).

Nấm gây bệnh có giai đoạn sinh sản hữu tính là Diplocarpon rosae (Horst, 2008), thuộc lớp nấm nang, nang và bào tử nang được hình thành trong quả nang có dạng đĩa (apothecia), giai đoạn này ít tìm gặp trong điều kiện tự nhiên.

Cách phòng trị đốm đen trên hoa hồng:

Để phòng ngừa bệnh cho cây hoa hồng, cần sử dụng giống hồng kháng hoặc nguồn giống sạch bệnh để nhân giống, trồng cây hồng trên giàn, cách ly với mặt đất (đây là điều rất nhiều nhà vườn trồng hồng ở Sa Đéc hay làm).

Sử dụng phân hữu cơ và cân đối phân đạm, lân và kali, sử dụng nguồn nước sạch, tránh tưới nước vào lúc trời tối, mật độ trồng thích hợp để tạo sự thông thoáng và cây hồng nhận được nhiều ánh sáng, vệ sinh vườn hồng thường xuyên, thu gom và tiêu hủy lá bệnh.

Khi bệnh mới xuất hiện, cách ly cây hồng bị bệnh, không tưới nước trực tiếp trên lá, ngưng bón phân và phun trên cả hai mặt lá với một trong các loại thuốc chứa hoạt chất:

+ Tebuconazol ( MAP UNIQUE 75 WPTEPRO SUPER 300ECNATIVO 750WG, …)

Diniconazole ( Sumi Eight 12.5WP, …)

+ Trifloxystrobin ( FLINTPRO 648WGNATIVO 750WG, …)

+ Hexaconazole ( MOTHANTILT 850WPVIXAZOL 275SCCAMILO 150SCMAINEX 50SCLASH SUPER 250SCFULVIN 5SCCASUVIN 500SCV-TVIL 500SCSAIPORA 350SC, …)

+ Chlorothalonil ( 

+ Difenoconazole.

Chú ý: luân phiên các hoạt chất thuốc sau 3-4 mùa vụ và pha thuốc theo đúng liều lượng hướng dẫn của nhà sản xuất được ghi trên bao bì. 

Đối với cây hồng như hình chụp này, cây bị đốm đen khá nhiều, 3 việc cần làm là:

  • Loại bỏ hết các lá vàng, có đốm đen chỉ chừa lại các lá xanh, chưa nhiễm bệnh

  • Cắt tỉa bớt phần ngọn hồng (bỏ đi 2-3 mắt lá đầu tiên, hoặc 2/10 chiều cao cây) nhằm kích thích cây đâm chồi mới.

  • Phun thuốc điều trị bệnh đốm đen cho cây hồng, bao gồm các loại thuốc và liều lượng pha hỗn hợp các loại thuốc này cho bình 2 lít:

SUPER COOK  (1 muỗng yaourt)

+ Nativo (gần 1/2 muỗng yaourt)  

+ Ychatot

+ B1 nhằm dưỡng cây và kích thích cây tăng trưởng 10 giọt (hoặc COMCAT 1/4 muỗng yaourt (cần rất ít))

+ AZIL (bổ sung thêm vi lượng cho cây hồng 1/4 muỗng yaourt)

Nếu đã làm theo các bước trên thì 70% sẽ cứu sống được cây hồng này, 30% còn lại còn tùy vào cách chăm sóc của người trồng hồng và điều kiện tiểu khí hậu của vườn.

Nguồn: Vân Loan Garden

Tư vấn kĩ thuật: 0933.067.033

 

331 thoughts on “BỆNH ĐỐM ĐEN – ROSE BLACK SPOT TRÊN CÂY HOA HỒNG

  1. Pingback: viagra 100mg
  2. Together with the whole thing that seems to be developing inside this area, your viewpoints are actually quite refreshing. However, I beg your pardon, because I can not subscribe to your whole idea, all be it stimulating none the less. It would seem to everybody that your comments are generally not completely validated and in reality you are yourself not entirely convinced of the assertion. In any event I did take pleasure in reading it.

  3. I am often to blogging and i really appreciate your content. The article has really peaks my interest. I am going to bookmark your site and keep checking for new information.

  4. Pingback: cheapest viagra
  5. Pingback: ciprofloxacin hcl
  6. Youre so cool! I dont suppose Ive read anything like this before. So nice to search out any person with some authentic ideas on this subject. realy thank you for starting this up. this website is something that’s wanted on the internet, someone with a little bit originality. useful job for bringing something new to the internet!

  7. I’ve been exploring for a bit for any high quality articles or blog posts on this sort of space . Exploring in Yahoo I ultimately stumbled upon this website. Reading this information So i am glad to exhibit that I have a very excellent uncanny feeling I found out exactly what I needed. I such a lot definitely will make certain to don?t put out of your mind this site and give it a look regularly.|

  8. Wow that was strange. I just wrote an incredibly long comment but after I clicked submit my comment didn’t appear. Grrrr… well I’m not writing all that over again. Anyhow, just wanted to say excellent blog!|

  9. Знаете ли вы?
    В 1941 году в московскую «Писательскую роту» пришли добровольцами бывший вор и следователь ЧК.
    Китайскую пустыню засадили лесами и открыли там фешенебельный курорт.
    Синим цветом своих футболок «Скуадра адзурра» обязана Савойе.
    Рассказ Стивенсона о волшебной бутылке был опубликован почти одновременно на английском и самоанском языках.
    Андрогинный псевдоним не спас автора от расшифровки.

    http://www.0pb8hx.com/

  10. Hmm it appears like your blog ate my first comment (it was super long) so I guess I’ll just sum it up what I had written and say, I’m thoroughly enjoying your blog. I too am an aspiring blog blogger but I’m still new to the whole thing. Do you have any points for inexperienced blog writers? I’d definitely appreciate it.|

  11. Ahaa, its fastidious conversation on the topic of this article at this place at this web site, I have read all that, so now me also commenting here.|

  12. Its such as you learn my thoughts! You appear to understand a lot approximately this, like you wrote the e book in it or something. I think that you just can do with some percent to pressure the message home a bit, but instead of that, that is great blog. A fantastic read. I’ll definitely be back.|

  13. You really make it appear really easy along with your presentation however I find this matter to be really one thing which I think I might never understand. It kind of feels too complex and very large for me. I am taking a look ahead for your subsequent post, I will try to get the hang of it!|

  14. Hiya! I know this is kinda off topic but I’d figured I’d ask. Would you be interested in trading links or maybe guest writing a blog post or vice-versa? My blog covers a lot of the same topics as yours and I believe we could greatly benefit from each other. If you are interested feel free to send me an e-mail. I look forward to hearing from you! Terrific blog by the way!|

  15. You’re so interesting! I do not think I have read anything like that before. So good to discover someone with unique thoughts on this subject matter. Really.. thank you for starting this up. This web site is something that is required on the internet, someone with a little originality!|

  16. Currently it sounds like Movable Type is the top blogging platform out there right now. (from what I’ve read) Is that what you are using on your blog?|

  17. Excellent blog you’ve got here.. It’s difficult to find excellent writing like yours these days. I truly appreciate people like you! Take care!!|

  18. Awesome things here. I am very glad to look your article. Thank you so much and I am having a look forward to touch you. Will you kindly drop me a mail?|

  19. I need to to thank you for this wonderful read!! I definitely loved every little bit of it. I have got you book marked to look at new stuff you post…|

  20. I am curious to find out what blog system you happen to be working with? I’m experiencing some minor security problems with my latest site and I would like to find something more secure. Do you have any suggestions?|

  21. Hello to every one, as I am really eager of reading this web site’s post to be updated on a regular basis. It consists of good stuff.|

  22. I was wondering if you ever considered changing the structure of your website? Its very well written; I love what youve got to say. But maybe you could a little more in the way of content so people could connect with it better. Youve got an awful lot of text for only having 1 or two pictures. Maybe you could space it out better?|

  23. I would like to thank you for the efforts you’ve put in penning this website. I am hoping to check out the same high-grade content from you in the future as well. In fact, your creative writing abilities has encouraged me to get my own, personal blog now ;)|

  24. Hey! I’m at work browsing your blog from my new iphone 3gs! Just wanted to say I love reading through your blog and look forward to all your posts! Keep up the superb work!|

  25. hey there and thank you for your information – I’ve certainly picked up something new from right here. I did however expertise some technical points using this site, since I experienced to reload the site many times previous to I could get it to load correctly. I had been wondering if your web hosting is OK? Not that I’m complaining, but sluggish loading instances times will sometimes affect your placement in google and could damage your high quality score if ads and marketing with Adwords. Well I am adding this RSS to my email and can look out for much more of your respective intriguing content. Ensure that you update this again very soon.|

  26. I’m not sure exactly why but this website is loading incredibly slow for me. Is anyone else having this problem or is it a issue on my end? I’ll check back later on and see if the problem still exists.|

  27. You really make it seem so easy with your presentation but I
    find this matter to be really something which I think I would
    never understand. It seems too complicated and extremely broad for me.

    I am looking forward for your next post, I will try to
    get the hang of it!

  28. Good day! This is my 1st comment here so I just wanted to give a quick shout out and say I really enjoy reading your blog posts. Can you recommend any other blogs/websites/forums that cover the same topics? Thank you so much!|

  29. Hello it’s me, I am also visiting this site regularly, this website is in fact nice and the visitors are truly sharing good thoughts.|

  30. Howdy would you mind sharing which blog platform you’re using? I’m going to start my own blog soon but I’m having a tough time making a decision between BlogEngine/Wordpress/B2evolution and Drupal. The reason I ask is because your design and style seems different then most blogs and I’m looking for something completely unique. P.S Sorry for getting off-topic but I had to ask!|

  31. I think that is one of the so much significant info for me. And i’m happy reading your article. However should remark on some common issues, The website style is wonderful, the articles is actually excellent : D. Good process, cheers|

  32. Hi! I could have sworn I’ve been to this blog before but after reading through some of the post I realized it’s new to me. Anyhow, I’m definitely happy I found it and I’ll be bookmarking and checking back often!|

  33. Howdy would you mind stating which blog platform you’re working with? I’m looking to start my own blog in the near future but I’m having a tough time making a decision between BlogEngine/Wordpress/B2evolution and Drupal. The reason I ask is because your design and style seems different then most blogs and I’m looking for something completely unique. P.S Sorry for being off-topic but I had to ask!|

  34. I like the helpful info you provide in your articles. I will bookmark your blog and check again here regularly. I’m quite certain I will learn many new stuff right here! Good luck for the next!|

  35. Aw, this was an exceptionally good post. Finding the time and actual effort to make a top notch article… but what can I say… I hesitate a whole lot and never seem to get nearly anything done.|

  36. I just couldn’t go away your website before suggesting that I really loved the usual info a person provide for your guests? Is going to be again frequently to check up on new posts|

  37. I am really loving the theme/design of your web site. Do you ever run into any internet browser compatibility problems? A handful of my blog audience have complained about my website not working correctly in Explorer but looks great in Firefox. Do you have any tips to help fix this issue?|

  38. This is really interesting, You’re a very
    skilled blogger. I have joined your feed and look
    forward to seeking more of your wonderful post.

    Also, I have shared your website in my social networks!

  39. If you would like to obtain a good deal from this piece of writing then you have to apply such strategies to your won blog.|

  40. Asking questions are really nice thing if you are not understanding something completely, except this article offers good understanding yet.|

  41. Hello, I think your blog could be having internet browser compatibility issues. Whenever I look at your blog in Safari, it looks fine however when opening in IE, it’s got some overlapping issues. I simply wanted to give you a quick heads up! Aside from that, fantastic blog!|

  42. Does your website have a contact page? I’m having a tough time locating it but, I’d like to send you an email. I’ve got some ideas for your blog you might be interested in hearing. Either way, great blog and I look forward to seeing it expand over time.|

  43. I don’t know if it’s just me or if everybody else experiencing problems with your site. It looks like some of the written text on your posts are running off the screen. Can somebody else please comment and let me know if this is happening to them as well? This could be a problem with my browser because I’ve had this happen before. Many thanks|

  44. hi!,I like your writing so much! percentage we keep up a correspondence more approximately your article on AOL? I need a specialist on this area to unravel my problem. May be that’s you! Looking ahead to see you. |

  45. I’ve been absent for a while, but now I remember why I used to love this blog. Thanks, I will try and check back more often. How frequently you update your web site?

  46. Very well written story. It will be beneficial to anyone who utilizes it, as well as myself. Keep doing what you are doing – can’r wait to read more posts.

  47. Magnificent items from you, man. I have be mindful your stuff prior to and you are just too wonderful. I actually like what you have got here, really like what you are stating and the way during which you assert it. You’re making it entertaining and you still care for to stay it wise. I can not wait to learn far more from you. This is actually a tremendous web site.

  48. Terrific paintings! That is the type of information that are meant to be shared around the net. Shame on Google for now not positioning this post upper! Come on over and talk over with my site . Thank you =)

  49. I’ve been surfing online more than 3 hours today, yet I never found any interesting article like yours. It’s pretty worth enough for me. In my opinion, if all website owners and bloggers made good content as you did, the net will be a lot more useful than ever before.|

  50. Terrific paintings! This is the type of information that are meant to be shared around the internet. Disgrace on Google for now not positioning this put up higher! Come on over and seek advice from my website . Thanks =)

  51. My husband and i were so ecstatic that Emmanuel managed to complete his research through the entire ideas he received while using the web pages. It’s not at all simplistic to simply be giving for free information and facts which usually people may have been making money from. And now we understand we have you to be grateful to for this. The most important illustrations you made, the easy website navigation, the relationships you help to instill – it is all amazing, and it’s really assisting our son in addition to the family reason why the idea is exciting, which is certainly rather vital. Thank you for the whole thing!

  52. Heya i am for the first time here. I found this board and I in finding It truly useful & it helped me out a lot. I’m hoping to present something again and help others like you aided me.

  53. You made some decent points there. I looked on the internet for the subject matter and found most individuals will consent with your site.

  54. hello there and thank you for your information – I have certainly picked up anything new from right here. I did however expertise a few technical points using this web site, since I experienced to reload the web site a lot of times previous to I could get it to load correctly. I had been wondering if your web host is OK? Not that I’m complaining, but sluggish loading instances times will very frequently affect your placement in google and could damage your high quality score if ads and marketing with Adwords. Anyway I’m adding this RSS to my email and could look out for much more of your respective exciting content. Ensure that you update this again soon.|

  55. Знаете ли вы?
    Свадьба английского рыцаря стала причиной войны между двумя могущественными родами.
    Молнию можно не только увидеть, но и съесть.
    В роскошном болонском фонтане горожане стирали бельё и справляли нужду.
    «С любимыми не расставайтесь…» автор написал после того, как чуть не погиб в железнодорожной катастрофе.
    Не удержавшись от писательства, Амалия Кахана-Кармон создала одну из важнейших книг в истории Израиля.

    http://www.arbeca.net/

  56. I visited several websites however the audio quality for audio songs existing at this web site is truly marvelous.|

  57. Знаете ли вы?
    Самцы косатки, обитающие в Британской Колумбии, всю жизнь живут с мамой.
    В роскошном болонском фонтане горожане стирали бельё и справляли нужду.
    Консервативные художественные критики обрушились на портрет девушки, называя её гермафродитом, дочерью Каина и проституткой.
    По выбору Утёсова дорога на Берлин шла то через Минск, то через Киев.
    Советский разведчик-нелегал создал в Европе разведгруппу, успешно проработавшую всю войну.

    arbeca.net

  58. I simply want to mention I’m new to blogging and site-building and actually liked you’re web page. Almost certainly I’m going to bookmark your website . You certainly have awesome stories. Thanks for sharing your website.

  59. Its such as you learn my thoughts! You appear to know a lot about this, such as you wrote the e book in it or something. I think that you just could do with some to drive the message house a little bit, but other than that, this is magnificent blog. A fantastic read. I will certainly be back.|

  60. I really like what you guys are up too. This sort of clever work and coverage! Keep up the superb works guys I’ve included you guys to blogroll.|

  61. Thank you for the good writeup. It in fact was a amusement account it. Look advanced to far added agreeable from you! By the way, how can we communicate?|

  62. I discovered your site web site on bing and check a couple of your early posts. Always maintain up the great operate. I simply additional increase Rss to my MSN News Reader. Seeking forward to reading much more by you down the road!…

  63. I’m not that much of a online reader to be honest but your sites really nice, keep it up! I’ll go ahead and bookmark your website to come back down the road. All the best

  64. I’ve been surfing online more than 2 hours today, yet I never found any interesting article like yours. It’s pretty worth enough for me. Personally, if all webmasters and bloggers made good content as you did, the net will be much more useful than ever before.|

  65. I’ll right away snatch your rss as I can not to find your email subscription link or newsletter service. Do you have any? Kindly allow me understand so that I could subscribe. Thanks.|

  66. Hi! I just wanted to ask if you ever have any trouble with hackers? My last blog (wordpress) was hacked and I ended up losing months of hard work due to no data backup. Do you have any methods to prevent hackers?|

  67. Greetings from Carolina! I’m bored at work so I decided to check out your blog on my iphone during lunch break. I love the knowledge you provide here and can’t wait to take a look when I get home. I’m amazed at how fast your blog loaded on my mobile .. I’m not even using WIFI, just 3G .. Anyhow, amazing blog!|

  68. Do you mind if I quote a few of your articles as long as I provide credit and sources back to your blog?
    My website is in the exact same niche as yours and my visitors
    would certainly benefit from a lot of the information you provide here.
    Please let me know if this okay with you. Thank you!

  69. Greetings from Ohio! I’m bored to death at work so I decided to check out your blog on my iphone during lunch break. I enjoy the information you provide here and can’t wait to take a look when I get home. I’m shocked at how quick your blog loaded on my phone .. I’m not even using WIFI, just 3G .. Anyhow, amazing site!|

  70. Youre so trendy! I do not expect Ive review anything such as this prior to. So wonderful to locate someone with some initial ideas on this subject. realy thank you for beginning this up. this web site is something that is required online, somebody with a little originality. beneficial task for bringing something brand-new to the web!

  71. I like what you guys are up too. This kind of clever work and reporting! Keep up the terrific works guys I’ve added you guys to blogroll.|

  72. I’ve been browsing online more than 2 hours today, yet I never found any interesting article like yours. It’s pretty worth enough for me. In my view, if all web owners and bloggers made good content as you did, the internet will be much more useful than ever before.|

  73. Thank you for the auspicious writeup. It in fact was a amusement account it. Look advanced to more added agreeable from you! By the way, how can we communicate?|

  74. I visited several websites however the audio quality for audio songs current at this website is genuinely marvelous.|

  75. I have learn some excellent stuff here. Definitely price bookmarking for revisiting. I surprise how a lot effort you set to make the sort of excellent informative web site.|

  76. There are some fascinating points in time in this short article however I don?t know if I see all of them center to heart. There is some validity however I will hold viewpoint till I look into it further. Excellent short article, thanks as well as we desire much more! Contributed to FeedBurner as well

  77. Hello would you mind letting me know which hosting company you’re utilizing? I’ve loaded your blog in 3 completely different internet browsers and I must say this blog loads a lot faster then most. Can you suggest a good web hosting provider at a reasonable price? Many thanks, I appreciate it!|

  78. I discovered your blog website on google and also check a few of your early blog posts. Continue to keep up the excellent operate. I simply extra up your RSS feed to my MSN News Visitor. Looking for ahead to learning more from you later on!?

  79. Its like you read my thoughts! You seem to grasp so much approximately this, like you wrote the book in it or something. I believe that you just could do with some to pressure the message house a little bit, however instead of that, that is wonderful blog. A fantastic read. I will certainly be back.|

Leave a Reply

Your email address will not be published.