COMPARATIVE BIOLOGY, POPULATION DYNAMICS AND MANAGEMENT OF CABBAGE APHID, Lipaphis erysimi (Kalt.)
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Date
2020
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DEPARTMENT OF AGRICULTURAL ENTOMOLOGY B. A. COLLEGE OF AGRICULTURE ANAND AGRICULTURAL UNIVERSITY ANAND
Abstract
Comparative biology of L. erysimi was studied on four different hosts viz.,
cabbage, cauliflower, mustard and radish under laboratory conditions. The mean total
nymphal period on different hosts ranged from 5 to 8 days being minimum on radish
6.08 ± 1.10 days with a range of 5 to 7 days while maximum on cabbage with an
average of 7.52 ± 0.57 days and range of 6 to 8 days. The mean duration of longevity
ranged from 5 to 11 days in different hosts. Adult longevity was maximum on
cabbage 8.56 ± 1.13 days with a range of 6 to 11 days and minimum on radish 7.20 ±
1.91 days with a range of 5 to 10 days. The highest pre-reproduction period was found
in cabbage (1.20 ± 0.40) with a range of 1-2 days and the lowest pre-reproduction
period was found in radish (0.68 ± 0.47) with a range of 0-1 days. The highest
reproduction period was recorded in cabbage (6.40 ± 0.66) days with a range of 5-8
days and the lowest in radish (5.60 ± 0.80) days with a range of 5-7 days. The highest
post-reproduction period was reported in cabbage (0.96 ± 0.66) days with range of 0-2
days and the lowest in radish (0.76 ± 0.58) days with a range of 0-2 days. The data on
fecundity revealed that the mean number of nymphs laid on different hosts ranged
from 12 to 39 nymphs per female being maximum on cabbage (29.48 ± 4.30)
followed by cauliflower (28.80 ± 3.29) and mustard (26.52 ± 8.10). The minimum
number of nymphs (23.96 ± 5.55) was laid on radish.