Pest and virus disease in zucchini (Cucurbita pepo L.) crops in Tepechicotlán, Guerrero, Mexico.

Abstract

In Tepechicotlán, Guerrero, Mexico is planted the
pumpkin for sale in the market with good yields.
Due to its economic importance, it was of interest to
determine the diseases that affect it since they can
affect its production. A review of three plots chosen
at random in the sampling area at 35 and 70 days of
development of the crop was carried out. In each
one, 100 plants were sampled following a zig-zag
procedure to establish the incidence and severity of
the disease in plants at both stages of development.
Calabac yellow mosaic virus (ZYMV) was detected
in the pumpkin plants of the sampling area. The
symptoms were yellowing, mottling and frizzling of
the leaves, followed by necrosis and defoliation,
deformed fruits, there was considerable reduction of
growth and productivity. At 35 days of development
of the crop were affected 50% of the plots, with an
average severity of 26%. At 70 days of
development, it was detected that the severity
reached on average 50%, the incidence was the
same of 43%. The pest of the white mosquito of the
genus Bemisia tabaci G. was identified as
transmitter of the ZYMV.