Efficacy of different insecticides against gall fly on mangoes.
Daneel M. S., Jager K. de, Steyn W., Husselman J.
Author Affiliation: Institute for Tropical and Subtropical Crops, Private Bag X11208, Nelspruit 1200, South Africa.
: 137-140
Abstract : Trials were conducted in a 'Tommy Atkins' mango orchard at Bavaria Estate in Hoedspruit area, South Africa to evaluate the efficacy of different insecticides against the gall fly, Procontarinia matteiana. The treatments were: untreated control; methomyl (Lannate) 200 g/l SL at 20 g/100 l water + medium narrow range mineral oil (Sunspray 7E 988 g/l at 500 ml/100 l water; abamectin (Agrimec) 18 g/l EC at 25 ml/100 l water + Sunspray 7E at 300 ml/100 l water; monocrotophos (Azodrin) 400 g/l SL at 50 ml/100 l water; fenthion (Lebaycid) 500 g/l EC at 100 ml/100 l water; prothiofos (Tokuthion) 960 g/l EC at 100 ml/100 l water; cartap hydrochloride (Suntab) 500 g/kg SP at 200 or 400 g/100 l water + Silwet at 50 ml/100 l water; and cyromazine (Patron) 750 g/kg WP at 25 g/100 l water). Products were applied after harvest, coinciding with the first major flush. Pruning was important in this regard as it induces a more even flush. A second treatment was applied 6 weeks later. Both Lannate and Lebaycid prevented the development of galls, with only lesions remaining on the leaves. Excellent control was obtained with Lannate and Lebaycid, while Azodrin was markedly less effective. Control should be undertaken as soon as damage is noticed and one application will probably be sufficient. Application of the treatments at the right time will reduce the pest drastically.