In six of the 10 replicates, only larvae on plants sprayed with chrysanthemum extract were parasitized (table 2).
Each dish was then sprayed, using a hand-held mister, with either water or the kaolin particle suspension.
Plots sprayed with insecticides were sampled at monthly intervals to confirm that the plants were free of insect damage.
The insecticide treatment history was obtained for each sprayed crop (table 1).
These plants were sprayed twice, at an interval of ten days.
Fenthion is sprayed at weekly intervals at a dosage of 0.78 ml/1 in polluted water, drains and trenches, which are the major breeding sites.
The net was sprayed every three days with water to prevent egg clutches from drying out.
Instead, the plots were sprayed with herbicide prior to garlic planting.
