Publication Type

Journal Article

Journal Name

Insect Science and its Application

Publication Date

1-1-2001

Abstract

Maize is the principal food and cash crop for millions of people in the predominantly mixed crop-livestock farming systems in Kenya. Stemborers and striga (Striga hermonthica) are major constraints to increased maize production in eastern Africa. An intercropping and trap crop system has been developed, using a ‘push-pull’ strategy, for the control of stemborers in small scale maize farming systems. The ‘push-pull’ strategy involves trapping stemborers on highly susceptible trap plants (pull) and driving them away from the crop using repellent intercrops (push). Napier grass (Pennisetum piirpiirenm Schumach) and Sudan grass (Sorghum vulgare sudanense Stapf J are used as trap plants, whereas raclasses grass (Melinis minutiflora BeauvJ and two species of desmodium (Desmodinm itncinatinn Jacq. and Desmodium intortum Urb.) repel ovipositing stemborers. The integrated ‘push-pull’ strategies were shown to increase parasitism of stemborers through attraction of parasitoids to one of the intercrops, molasses grass. The leguminous intercrop, silver leaf desmodium, drastically reduced damage to maize by the parasitic weed, striga. This aspect was further investigated and developed for integration with stemborer control. On-farm trials’ with farmers in Kenya have shown significant yield increases in maize farming. © 2001 ICIPE.

Keywords

Habitat management, Kenya, Maize, Stemborers, Striga hermonthica, ‘push-pull’

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