Bioecology of tomato fruit borer and its management with biopesticides
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Date
2016
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Publisher
MPUAT, Udaipur
Abstract
The investigation on “Bioecology of tomato fruit borer and its management
with biopesticides” was conducted at Instructional Farm, Rajasthan College of
Agriculture, Udaipur during rabi (October 2015 to April 2016).
The tomato fruit borer, Helicoverpa armigera (Hub.) larvae were found to
infest tomato crop throughout the growing season. The incidence of fruit borer, H.
armigera on tomato without marigold as a trap crop was first noticed in the first week
of February. The pest touched the peak with a mean of 4.40 larvae / five plants during
third week of March. The correlation between fruit borer population and mean
atmospheric temperature was positive and significant. While, it exhibited nonsignificant
negative correlation with relative humidity.
Similarly, The incidence of fruit borer, H. armigera on tomato with marigold
as a trap crop was first noticed in the fourth week of January. The pest touched the
peak with a mean of 1.20 larvae / five plant during third week of March. The
correlation between fruit borer population and mean atmospheric temperature was
positive and significant. While, it exhibited non-significant negative correlation with
relative humidity.
Among different treatments, three spray of Spinosad 45 SC (200ml/ha) at 15
days interval were found significantly superior over all the treatments in terms of
mean reduction of tomato fruit borer larvae, mean fruit damage and marketable fruit
yield. It recorded mean marketable yield of 108.55 kg/plot which was significantly
higher than all the treatments. HaNPV (250 LE/ha), Bt (1.5 kg/ha) and Neem oil (3%)
followed the above treatments in terms of efficacy.
Description
Bioecology of tomato fruit borer and its management with
biopesticides
Keywords
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Citation
Kumar and Mahla, 2016