Delayed dormant spray (bal-spray oil) for the management of two major sucking pests of apple in Kashmir
2020
Sofi, Muneer Ahmad
Field studies were conducted to evaluate the efficacy of two oil dormant sprays at different concentrations to manage San Jose scale (Quadraspidiotus perniciosus Comstock) and European red mite (Pananychous ulmi Koach) on apple (Malus × domestica Borkh.) during 2017–18 at Bandipora of Kashmir. The highest cumulative mean mortality (80.13%) was recorded with the application of bal spray oil (2.5%) followed by 77.35%. mortality of SJS @ 2.0% concentration of bal spray oil while as H.P spray oil @ 2.5% concentration exhibited 79.73% cumulative mean mortality of SJS. and lowest cumulative mean mortality of 75.24% @ 1.5% concentration of bal spray oil for both the years. The impact of oils on European red mite revealed that highest cumulative mean mortality (85.01%) was recorded with the application of bal spray oil at concentration of 2.5% followed by 79.69%. mortality of ERM @ 2.0% concentration of Bal spray oil. The impact of these delayed dormant oils on natural enemies of the two key pests of apple was also recorded.
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