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Biology and chemical control of castor hairy caterpillar, Euproctis lunata walker (Lepidoptera: Lymantriidae)

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Title Biology and chemical control of castor hairy caterpillar, Euproctis lunata walker (Lepidoptera: Lymantriidae)
 
Creator Kamboj, Robin
 
Contributor Gaur, Ram Karan
 
Subject Planting, Genotypes, Sowing, Yields, Developmental stages, Genetics, Soybeans, Biological phenomena, Selection, Phenotypes
 
Description Field and laboratory studies on biology, population dynamics and insecticide bioefficacy
evaluation against castor hairy caterpillar, E. lunata (Lepidoptera: Lymantriidae) were carried out at
CCS Haryana Agricultural University, Regional research station, Bawal during 2014-15. Studies on
biology of E. lunata showed that eggs of this species were creamish white, round, pear shaped and
found in cluster of 85 to 221. The incubation period varied from 5 to 10 days. There were six larval
instars and the larval duration varied from 2 to 7, 3 to 11, 3 to 13, 4 to 15, 4 to 17 and 4 to 19 days in
different generations. The pupa was light reddish brown, obtect and pupal period varied from 12 to 19
days in different generations. Male moths of E. lunata were smaller (mean 31.02±0.54 mm in wing
expense) than female (mean 36.06±0.61 mm in wing expense). The antennae of male moths were
bipectinate whereas the female had filiform antennae. There was a slight difference in sex ratio, being
in favour of female. The pest completed three generations under laboratory conditions. Apanteles
euproctisiphagus Ahmad a hymenopteran parasitoid caused 20 to 40 per cent larval parasitization in
different months. Male lived for 4 to 7 days whereas female for 5 to 9 days. The total life span of male
ranged from 44 to 124 days, while that of female as 45 to 127 days in different generation.
The observations on pest population showed that larval population fluctuated from 1.0 to 9.0
larvae per plant. Three peaks of larval population were recorded during September 20-29, 2014 (9.0
larvae per plant), November 19-28, 2014 (5.2 larvae per plant) and March 19-28, 2015 (3.5 larvae per
plant). Larval population showed positive correlation with maximum temperature (0.574) and
minimum temperature (0.335) whereas negative correlation with morning (-0.570) and evening (-0.572) relative humidity. Insecticide bioefficacy studies indicated that novaluron 10 EC @ 0.01 per
cent proved most effective in controlling E. lunata both under field as well as laboratory conditions.
However, cypermethrin 25 EC @ 0.018 per cent gave 75.60 per cent larval mortality with highest
benefit cost ratio (1: 21.93).
 
Date 2016-10-21T11:31:54Z
2016-10-21T11:31:54Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/81208
 
Language en
 
Format application/pdf
 
Publisher CCSHAU