Abstract
In non-replicated glasshouse experiments with tomatoes and cucumbers, the pesticide heptenophos (Hostaquick 55% ec.) with its systemic and short persistence properties was found to be useful in integrated programmes where biological control of major pests was used, but chemical control of minor pests such as leafhopper ( Hauptidia maroccana) and thrips ( Thrips tabaci) was necessary. A spray interval of 10 days was considered to be the best compromise between kill of pests and depletion of natural enemies. The pesticide MK-936 (avermectin B1) was disruptive to biological control agents and ineffective against the minor pests. It is thus unsuitable for integration, but was found to be very effective as a purely chemical control agent of two-spotted mite.
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