Development of judicious insecticide use against insect pests of stringbeans and eggplant

Professorial Chair Lecture

Inagural Professorial Chair Lecture

Place

UPLB Publication

Date

6-25-1998

Abstract

The population dynamics of major insect pests of stringbeans and eggplant were characterized and used as basis for developing a judicious insecticide use pattern aimed at managing pest population in these two most commonly grown vegetables. Results showed that in general, the early sucking pests attacking eggplant are predominant during the following periods: 21 to 24, 42 to 48,70 to 77 and 81 to 90 days after transplanting (DAT) while late pests. particularly the fruit and shoot borer was recorded as early as 42 DAT until the final harvesting. likewise, predominant insect pests were observed in stringbeans at the following stages: I 2-15. 22-23 and 51-65 days after emergence (DAY). A complimentary studs showed that early sucking insect pests like aphids and leaf hoppers can be effectively controlled by appropriate insecticide. %former. results of the insecticide-natural enemy complementation study showed that Trichogramma egg parasitoids can he used as a substitute control intervention against the bran pod borer and the eggplant shoot and fruit borer. The egg parasitoids haw to he released at 12 DAT and 50-54 DAE for eggplant and stringbeans, respectively. This technique reduced insecticide application to at most 3 sprays from the Onset of reproductive (early flowering) stage. The proposed insect pest management scheme, which substituted one to two insecticide sprays against the late pests, gale comparable les el of protection with the full insecticide treatment.

Location

UPLB Main Library Special Collections Section

Call Number

PL

Pages/Collation

19 leaves

This document is currently not available here.

Share

COinS