Help me to comprehend this disease on Momordica charantia (karela, bitter melon, bitter gourd, bitter squash, goya).

Cucumber    Italia

Pronounced leaf chlorosis, ripe fruit prematurely, leaf dieback.
The cultivation temperature: minimum 15 ° C - Maximum 30 ° C.
Constant irrigation. Healthy roots. Good fertigation system.
Ripe fruit prematurely not assoced whit desease (???), spread throughout the greenhouse. (!!!)

It is a viral infection (yellow mosaic and leaf curl, ...) or bacteriosis disease?

Posted by: Dr. Raffaele Giurato (6 points) Dr. Raffaele Giurato
Posted: April 15, 2016


It looks like squash leaf curl disease of bitter gourd caused by Squash Leaf Curl Virus (SLCV). The main symptoms are yellowing of leaves along margins and/or inter veinal regions. Leaflets are reduced in size and curled upwards. The shoots are stunted and erect. The infected plants produce few poor quality fruits.
The disease is transmitted by whitefly Bemisia tabaci. The disease is common in greenhouses in temperate regions.

Posted by: Dr. Ravishankar Narayana (11 points) Dr. Ravishankar Narayana
Posted: April 15, 2016

Dr. Raffaele Giurato commented,
Dear Ravi, SLCV is not present in Europe. What is the mode of transmission of SLCV? By seed? The seeds were imported. Premature ripening of the fruit is widespread in all the greenhouses, and I do not understand the cause.
about 4 years ago.

Dr. Ravishankar Narayana commented,
SLCV is mainly transmitted by whiteflies and sap inoculation. The symptoms on leaves and plants resembles leaf curl virus except premature ripening. I think the disease is caused by two or three viruses. By the way from where you imported seeds? What is the previous crop you grown in the green house? and also is there any insect infestation like whiteflies, aphids, beetles etc.,
about 4 years ago.

Dr. Raffaele Giurato commented,
The seeds were imported from Bangladesh. Previously it was grown tomato.
about 4 years ago.

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