Chemigation versus foliar application for management of pest complex - Atulkumar P. Prajapati - Bog

Investigations were carried out to evaluate the efficacy of different insecticides by different methods of application as title under "Chemigation versus foliar application for management of pest complex of Cowpea (Vigna unguiculata L.Walp) under South Gujarat conditions¿ at Navsari Agricultural University, Navsari during summer2018. The results revealed that aphid (Aphis craccivora Koch.) population started from 4thweek of March i.e. 13th SMW with 0.56 aphid index, increased continuously and reached to a peak level of 3.0 aphid index during 3rd week of May; jassid (Empoasca kerri Pruthi) population started from 3rd week of March (12th SMW) with 0.26 jassid/ 3 leaves/ plant and reached to a peak level of (4.66 jassids/3 leaves/ plant) in 8th week after sowing i.e. 5th week of April. (19thSMW) whereas whitefly (Bemisia tabaci Genn.) population started 1stWAS i.e. 3rd week of March (12th SMW) with 0.66 whitefly/3 leaves/Plant and reached to a peak level of 4.06 whiteflies per 3 leaves/ plant during 7th WAS in 1st week of May (18th SMW). The incidence of cowpea pod borer, (Helicoverpa armigera Hubner) initiated from 5thWAS i.e. 3rd week of April (16th SMW).