Diseases
Squash leaf curl virus
Cucurbita pepo L.
A disease of squash caused by the Squash leaf curl virus (SLCV) of the family Geminiviridae. It is transmitted by whiteflies and leads to leaf deformation, plant stunting, and a loss of fruit marketability.
In the reference 4 varieties crop Field pumpkin, where this is mentioned in the description.
The SLCV pathogen belongs to the genus Begomovirus and possesses single-stranded DNA. There is a complex of virus strains, including the California isolate SLCV-CA and the widely distributed WCMoV strain, which infects various cucurbit crops. The vector of the infection is the whitefly Bemisia tabaci.
Primary symptoms of infection appear 6–12 days after inoculation. They include characteristic severe upward curling of leaf blades, the appearance of blistering, a mosaic pattern, and general chlorosis. Infected plants produce small, deformed fruits, and the growth of the plant itself is significantly stunted.
Breeding efforts are aimed at creating varieties and hybrids that possess intermediate or high resistance to the virus, which is designated by the code SLCV in technical documentation. Resistance to this pathogen is often considered in conjunction with measures for controlling whitefly populations.
General information about the subject — on the page Potato leafroll virus.
Varieties of Field pumpkin mentioned in the description
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