AVRDC International Cooperators'
Fact Sheet
Cucurbit Diseases


Viral Diseases



Found worldwide		 unidentified virus diseases

 
 Transmitted by aphids
CMV in zucchini squash leaf CMV in cucumber fruits PRSV in watermelon leaf WMV in cucumber leaf ZYMV in melon leaf
Cucumber Mosaic (CMV)
Cucumovirus group.
Most cucurbits, less watermelon.		 Papaya Ringspot
(PRSV-W2)
Potyvirus group.
All cucurbits.		 Watermelon Mosaic (WMV-2)
Potyvirus group.
All cucurbits.		 Zucchini Yellow Mosaic (ZYMV)
Potyvirus group.
All cucurbits.
         
 Transmitted by nematode and/or seed
chlorotic ringspots in cucumber leaf severe mosaic caused by TRSV and WMV complex
Tobacco Ringspot (TRSV)
Nepovirus group.
Squash, cucumber, cantaloupe.
(photo on right is TRSV complex with WMV-2)
         
 Transmitted by whiteflies
 Squash Leaf Curl (SLCV). Geminivirus. Most cucurbits, less in cucumber.
 
 Transmitted by cucumber beetle
 Squash Mosaic (SqMV). Comovirus. Squash, pumpkin, and cantaloupe.
 
 Transmitted mechanically
 Cucumber Green Mottle Mosaic (CGMMV). Tobamovirus. Watermelon, cantaloupe, and cucumber.

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