POPULATION DYNAMICS AND MANAGEMENT OF PEST COMPLEX OF LUCERNE, Medicago sativa Linn.
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Date
2008
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Anand Agricultural University
Abstract
The present investigations on population dynamics and management of pest
complex of lucerne, Medicago sativa L. were carried out under middle Gujarat condition
at Main Forage Research Station, Anand Agricultural University, Anand during the year
2006-07 and 2007-08.
A study on population dynamics showed that lucerne aphid Therioaphis maculata
(Buckton) commenced in first week of January and peaked during last week of January.
Coccinellids, Menochillus sexmaculatus L. and chrysopa, Chrysoperla carnea Steph.
were closely associated with aphid population. Abiotic factors viz., maximum and mean
temperature, mean relative humidity, mean vapour pressure and bright sunshine hours
showed negative correlation with population of aphid. Whereas, minimum temperature
and wind speed were positively correlated with the pest population. The population of
lucerne thrips, Caliothrips indicus Bagnall, was active from the second week
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Keywords
Agricultural Entomology, Management