Plant Virus Disease Spread Through Insect Vectors and Their Management 157
control plot. The pooled observations of all the
four sprays indicated significant reduction in the
incidence of disease by different treatments as
compared to the untreated control showing 64.88
percent disease incidence. Plants in the plots
having maize as a border crop and subsequently
sprayed with dimethoate (0.05 %) and azadi-
rachtin (4 ml/lt) alternately at fortnightly interval
recorded lowest incidence of the virus, (22.50 %)
and thus was significantly superior over all other
treatments in checking the disease incidence. The
other remaining treatments in order of their ef-
fectiveness were acetamiprid (0.005 %), imida-
cloprid (0.01 %), thiamethoxam (0.005 %), aza-
dirachtin (4 ml/lt), dimethoate (0.05 %), and bu-
profezin (0.025 %) showing 43.33, 44.12, 44.48,
47.92, 48.70, and 52.27 percent incidence of
disease caused by PRSV (P). Kalleshwarswamy
et al. ( 2009 ) also reported that aphid vector man-
agement using timely chemical intervention as a
component has a place in integrated management
of PRSV on papaya.
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