0
points
Baby cucumber diseases

Cucumber   

I am in Vietnam, with humid tropical climate, I often encounter this problem on my cucumber, with symptoms as shown, only two days after it will get worse, I did not know how to prevent it at the beginning, and when it first appeared, what should I do to handle it?
Please help me!


Posted by: Phan Dung (1 point) Phan Dung
Posted: January 16, 2017




Answers

1
point
Dung,
it looks like Angular leaf spot, caused by Pseudomonas syringae pv. lachrymans.
Look at http://mtvernon.wsu.edu/path_team/cuc...
http://www.journalcra.com/sites/defau...

But, you must isolate the pathogen to be sure. The pathogen can be transmitted by infected seeds, by rain, etc. The pathogen will stay in infected plant debris until they will be completely decomposed. Copper-based fungicides or biocontrol agents can reduce the disease spreading.
Alex


Posted by: alex ignatov (1 point) alex ignatov
Posted: January 16, 2017


Phan Dung commented,
Thanks Alex. I noticed all the times that I encountered this problem, after sprayed, leaves are burnt and can not be recovered. So if in the first sign I got, what can I do?
about 7 years ago.

alex ignatov commented,
Dear Dung, Do you mean you sprayed plants with some pesticide? Alex
about 7 years ago.

Phan Dung commented,
Alex, I spray DuPontTM Equation® 52.5WG (Cymoxanil 30 % + Famoxadone 22.5%) 1gram/lit, rotation with Copper Hydroxide. After sprayed, I noticed the lesions was dry but leaves are burnt. It was worse.
about 7 years ago.

alex ignatov commented,
Dung, sorry, but 1 g/L looks too high concentration for diseased leaves. You have chemical burn on leaves. Try to use 0.3 g/L. Copper alone should work too.
about 7 years ago.



0
points
I am in Somalia, with tropical climate, I often encounter this problem on my citrus, I did not know how to prevent it at the beginning, and when it first appeared, what should I do to handle it and what can it be treated, also I want you to tell me the names of the diseases which infected it(Citrus).
Please help me!


Posted by: Aidarus (1 point) Aidarus
Posted: January 26, 2017


Dr. Ravishankar Narayana commented,
Please create separate question to get more response. Thanks
about 7 years ago.



You need to log in if you'd like to add an answer or comment.
Heart Heart icon