POPULATION DYNAMICS OF VARIOUS INSECT PESTS AND MANAGEMENT OF POD BORERS IN INDIAN BEAN, Lablab purpureus L.
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Date
2019
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DEPARTMENT OF AGRICULTURAL ENTOMOLOGY B. A. COLLEGE OF AGRICULTURE ANAND AGRICULTURAL UNIVERSITY ANAND
Abstract
The population of aphid (Aphis craccivora Koch) commenced during 4th week
of October and persisted till fourth week of January which ranged from 3.45 to 45.92
aphids per three shoots of 10 cm. The higher activity of this pest was observed during
1st week of January. Population of jassid (Empoasca kerri Pruthi) was appeared during
fourth week of October and persisted till 4th week of January which varied from 0.73
to 7.11 jassids per three leaves. On initiation, pest showed decreasing trend and
reached to its lowest level i.e. 0.73 jassids per three leaves. The peak population of
jassid (7.11 jassids/3 leaves) was observed during fourth week of December. The
incidence of whiteflies (Bemisia tabaci Genn) was started from fourth week of
October and remained up to fourth week of January with peak (5.13/3 leaves) during
fourth week of December. The population of pod borer (Helicoverpa armigera
Hubner) infesting Indian bean commenced from fifth week of October
(0.87 larva/plant) and remained till fourth week of January.