Mango Shoot Caterpillar Control on Mango Flowers, 1985

The experiment was conducted in Agat, Guam in a mango orchard of seed-planted trees of varying ages. Individual trees were induced to flower by spraying a mixture of KN03 and NaN03 at the rate of lOOg of each chemical per 100 gallons of water. Trees were treated on 16 and 23 Jan. The pesticide treatments were started as soon as flower buds were observed, and repeated weekly until harvest. Pesticides were applied with a 50 gallon truck mounted power sprayer, and sprayed to the drip point. Each treatment was applied to half a tree, and replicated 6 times in a randomized block design. On 15 Feb, 10 flowers per treatment were chosen randomly, and rated. If the flower was undamaged, it was rated 0, if it was partly consumed it was rated 1, and if it was completely consumed it was rated 2. Fruit was harvested as it was beginning to ripen, sorted into damaged and undamaged groups, and counted. Fruit was harvested on 23 and 30 May.