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Young Guava plant leaves developing brown lesions & empty patches

Guava    None Given

I live in Houston TX & bought a young guava plant (perhaps 2 .5 feet high) from a nursery & have had it planted for about 1.5 months. I recently noticed that a few leaves (maybe 3 or 4 in total) have developed either brown spots or lesions & it seems like something is eating away the leaf from within (notice one of the pics with an empty patch within). It has been raining alot lately so I am not sure if this has to do with too much water? Or is this a fungus or some insect? Please advise on how to treat this?


Posted by: Baber Khan (1 point) Baber Khan
Posted: May 26, 2016




Answers

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I think the disease is pseudocercospora leaf spot (a fungal disease) caused by Psuedocercospora psidii. The main symptoms are appearance of irregular to sub-circular, smoky brown spots with dark brown border. The spots may coalesce to form big area of necrotic tissue. Warm, humid and rainy conditions favors the disease. The disease mainly spreads by splashing water and wind.

Remove the infected leaves and burn them. If the disease appears again you can spray kocide or copper hydroxide.



Posted by: Dr. Ravishankar Narayana (11 points) Dr. Ravishankar Narayana
Posted: May 26, 2016


Baber Khan commented,
Thanks Ravi. You sure this is not some insect eating the leaves? also, it has been raining quite a bit here. Additionally, every time I water the plant, I spray/splash the leaves from the hose, do you suggest I stop doing that?
about 4 years ago.

Dr. Ravishankar Narayana commented,
Second leaf looks like insect damage but I won't think it is major problem. Though you can look out for any insect and kill them. Also please don't use hose to water plants. Apply water directly to soil.
about 4 years ago.



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Thanks Ravi. You sure this is not some insect eating the leaves? also, it has been raining quite a bit here. Additionally, every time I water the plant, I spray/splash the leaves from the hose, do you suggest I stop doing that?


Posted by: Baber Khan (1 point) Baber Khan
Posted: May 26, 2016




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