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Authors
Affiliations
1 Department of Entomology, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, NAVSARI
(GUJARAT), IN
Source
International Journal of Plant Protection, Vol 8, No 1 (2015), Pagination: 112-117
Abstract
Investigations were carried out on population dynamics of major insect pests that attack cowpea [Vigna ungiculata (L.) Walp.] at Regional Horticultural Research Station, Navsari Agricultural University, Navsari during 2012-13. The results revealed that aphid and jassid population started from 3rd week of October, reached a peak of 3.4 aphid index and 3.8 jassids/ leaf by 1st week of December whereas whitefly population started from 3rd week of October and reached to a peak level of 3.7 whiteflies per leaf in 4th week of November. Cowpea pod borer population started in 2nd week of November and reached to a peak level (2.8 larvae/plant) in 1st week of December and thereafter, decreased gradually. Spotted pod borer population started from 1st week of November coinciding with the flower initiation and reached to a peak of 2.8 larvae per leaf in 1st week of December. Among various weather parameters, evening relative humidity showed a significantly negative influence on population of almost all pests and minimum temperature showed a significantly negative correlation with aphid, cowpea pod borer and ladybird beetle population.
Keywords
Cowpea, Population Dynamics, Aphid, jassid, Whitefly, Pod Borer.
