Journal of Biological Control

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A Chrysoperla larval applicator named as Durgapura Chrysoperla larval applicator (DCLA) has been designed, developed and tested for application against soft bodied insect pests in crops. The applicator is cheap, and can be easily fabricated from locally available materials by village artisans. The applicator has a boom (hollow aluminium rod), on which plastic containers are screwed, as per the row spacing of the crops. The entire applicator hangs on the shoulders of the operator. The containers are filled with desired number of Chrysoperla larvae in an inert carrier. During application, the operator walks between the crop rows and keeps on striking the boom with two light wooden rods to facilitate uniform release of the predatory larvae on to the crop. The larvae so released, are either trapped on whorl or leaves and those falling on soil search their way to the prey. The field tests on barley, cotton, cowpea and chilli crops revealed that the applicator performance efficiency ranged from 69.23 to 73.64 per cent, and the output from 2.59 to 3.07 h for one hectare crop area.


Keywords

BiologicBiological Control, Chrysoperla carnea, Chrysoperla Larval Applicator.
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