CARRY-OVER AND BIOLOGY OF LADYBIRD BEETLE, Cheilomenes sexmaculata (Fabricius) UNDER MIDDLE GUJARAT CONDITIONS
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Date
2006
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Anand Agricultural University, Anand
Abstract
Investigations on carry over and biology of Cheilomenes sexmaculata (Fab)
were carried out at B. A. College of Agriculture, Anand Agricultural University,
Anand during the year 2004-05.
Activity of C. sexmaculata on okra crop was found from July to August during
kharif with peak activity of adults (17 per 50 plants) and grubs (12 per 50 plants)
during 2nd and 3rd week of July, respectively. Negligible numbers of coccinellid beetles
were observed on soybean crop during July. Population of C. sexmaculata on kharif
maize was started from mid-July. Grubs and adults were first observed during 3rd
week of July, gradually increased and reached to its peak level during third (125
grubs/ 50 plants) and fourth (87 adults/ 50 plants) week of August. The population
decreased and disappeared in mid - September. The activity of C. sexmaculata on
cotton crop was very low upto the end of October, increased gradually and attained its
first peak (64 grubs and 29 adults / 50 plants) during third week of November
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Keywords
Agricultural Entomology, Study