Abstract
Abstract Spurs bearing 10-15 psylla eggs were collected from mature Bartlett pear trees in April. In the laboratory each spur was dipped (in and out), 6 replicates each, in each of the insecticides listed and then fixed upright in a flask with the base of the spur immersed in water to keep the spur fresh. The treated spurs were held at room temperature (21-22°C) in natural daylight. Evaluation of ovicidal activity was made at 5 days post-hatch of the eggs in the check by counting the hatched and unhatched eggs.
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