Eco-friendly Management of Major Insect Pests of Cauliflower (Brassica oleracea var. botrytis)
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Date
2021
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Publisher
MPUAT, Udaipur
Abstract
The present investigation on "Eco-friendly management of major insect
pests of cauliflower (Brassica oleracea var. botrytis)” was conducted during Rabi,
2020-21 at Horticulture farm, Rajasthan College of Agriculture, MPUAT, Udaipur.
The study revealed that the incidence of DBM and aphid started in the second
week of December, while S. litura in the fourth week of December. The peak
population of S. litura (3.42 larvae/plant), aphid (148.46 aphids/ 3 leaves) and DBM
(9.64 larvae/plant) were observed during first week of February, first week of March
and third week of March, respectively. The DBM and aphid population exhibited
positively significant correlation with mean temperature and sunshine. The DBM and
aphid population showed negatively significant correlation with mean relative
humidity. The larval population of tobacco caterpillar, S. litura had negatively
significant correlation with temperature.
Among the natural enemies, predatory coccinellids, syrphid and spiders were
appeared during third week of December, fourth week of December and second week
of January, respectively. The peak population of coccinellids (1.40 adults/plant) was
observed during third week of February, while syrphid (1.60 maggots/plant) and
spiders (0.60 spiders/plant) were observed during first week of March. The correlation
of predatory coccinellids, syrphid maggots and spiders with sunshine was positively
significant, while significant negative correlation with relative humidity.
Among different treatment, T6 (Cauliflower + Tomato + Bio-pesticide) was
found most effective against DBM larvae, S. litura larvae and aphid in cauliflower. It
is followed by T1 (Cauliflower + Garlic + Bio-pesticide) and T2 (Cauliflower r +
Onion + Bio-pesticide). Next effective treatments were T4 (Cauliflower + Lucern +
Bio-pesticide), T5 (Cauliflower + Berseem + Bio-pesticide) and T3 (Cauliflower +
Mustard + Bio-pesticide). The least effective treatment was T7 (Cauliflower + Biopesticide)
with minimum reduction of pest population
Description
Eco-friendly Management of Major Insect Pests of Cauliflower
Keywords
Citation
Patel T.D. And Vyas A.K.