Efficacy of Insecticides on Strawberry For Control of Larvae of Black Vine Weevil, 1980

Everbearing strawberries potted in a 3:2 peat-sand mix in 6 inch containers were infested with 50 “brown stage” eggs by placing the eggs in each container, ca 1 inch deep next to the roots. Thirty days after infestation, the pre-moistened mix was drenched to saturation with 6 fl oz of an insecticide/water solution. Each of the 21 treatments were replicated 3 times, and each replicate consisted of 5 plants to ensure adequate populations of the larvae. Ninety days after infestation, the mix in each pot was removed, sifted, and the number of living larvae was noted and recorded. The pots were held in an unheated greenhouse during the mid-Aug to mid-Nov test period. Phytotoxicity was determined 7 and 60 days after treatment.