Incidence of Major Insect-Pests and Management of Soil- Inhabiting Insects in Groundnut (Arachis hypogaea L.)
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Date
2015
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Publisher
MPUAT, Udaipur
Abstract
The present investigation on “Incidence of Major Insect-Pests and Management of
Soil-Inhabiting Insects in Groundnut (Arachis hypogaea L.)” was conducted during July
to October 2014, at Reasearch farm, College of Technology and Engineering, Udaipur.
Groundnut crop was infested by aphid (Aphis craccivora Koch), jassid (Empoasca
kerri Pruthi), thrips (Scirtotharips dorsalis Hood), tobacco caterpillar (Spodoptera litura
Fab.), white grub (Holotrichia consanguinea Blanchard) and termite (Odontotermes
obesus Rambur). The study revealed that the incidence of aphid (A. craccivora), jassid (E.
kerri) and thrips (S. dorsalis) was commenced in second weak of August. Jassid and
thrips touched the peak during the second week of September (7.00 jassid/3 leaves and
3.80 thrips/3 leaves). While, aphid touched its peak in the third week of September (7.60
aphid/3 leaves). The incidence of tobacco caterpillar, S. litura was commenced in the
second week of September and touched its peak in the second week of October (1.40/
plant). The aphid exhibited a negative correlation with temperature and rainfall, whereas
positive correlation with relative humidity. However, the correlation was non significant.
Jassid exhibited a negative correlation with temperature and positive correlation with
relative humidity and total rainfall, which were non-significant. The correlation between
thrips and temperature was negative but with total rainfall, the correlation was positive
and non significant and correlation with relative humidity was positively significant. The
tobacco caterpillar exhibited a negative and significant correlation with relative humidity
and total rainfall, while with temperature negatively non significant. Among different
treatments, soil application of phorate 10 % G at 25 kg ha-1 at the time of sowing was
found most effective which caused highest reduction of white grub and termite.
Next effective treatments were drenching of Chlorpyriphos 20 EC at 600 ml ha-1,
Imidacloprid 200 SL at 2400 ml ha-1 and Fipronil 5 % SC at 2500 ml ha-1. The drenching
of Metarhizium anisopliae at 4 x 1012 conidia ha-1, Steinernema carpocapsae at 5 b Ijs ha-
1 and Beauveria bassiana at 4 x 1012 conidia ha-1 were least effective.
Description
Incidence of Major Insect-Pests and Management of Soil- Inhabiting Insects in Groundnut (Arachis hypogaea L.)
Keywords
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Citation
Ahir and Rana, 2015