Insecticide Trials on Cucumber, 1987:

Abstract

Abstract Cucumbers were planted 26 Aug. The plants were grown on trellises in rows 5 ft apart. Black plastic mulch was laid on all rows. The design of the experiment was a split-plot. To determine whether A. similis could be controlled with insecticides applied in the soil, granular Diazinon was applied to half the rows; the other half were untreated. The soil type was a Guam clay, a shallow clay soil over limestone. The soil temperature was 29°C. Each row was then split into four foliar insecticide treatments. Foliar insecticides were applied with a Solo backpack sprayer, and approximately 150 gal water was sprayed per acre. Each treatment was replicated 4 times. Foliar treatments were applied weekly, beginning 16 Sep. A. similis were counted by walking along the rows and counting all adults visible on the foliage. D. indica numbers were estimated by counting the number of caterpillars per leaf on each of 10 mature leaves/subplot. Thrips and aphids were counted by picking 10 mature leaves per subplot and bringing them in bags to the laboratory where they could be counted under a binocular microscope.