Reduced oviposition by green lacewings (Neuroptera: Chrysopidae) on cotton intercropped with corn, beans, or weeds in Nicaragua
Schultz, B.B.
In an experiment in small plots planted in Nicaragua, counts of green lacewing (Neuroptera: Chrysopidae) eggs were made on cotton intercropped with corn, beans, or weeds, and in cotton monocultures. Significantly fewer eggs were found on cotton plants intercropped with corn and weeds than in cotton monocultures, but cotton plants tended to be smaller in intercrops. The lower chrysopid egg numbers in cotton intercropped with corn or weeds were significant when adjusted for differences in leaf number per cotton plant and mean cotton leaf area, but not significantly lower on cotton intercropped with beans. Mechanisms are suggested to explain the reduction in egg numbers in the intercrops, including a decrease in the numbers of prey(aphids) and the presence of other predators (earwigs).
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