2.3 Data Collection
Pre-spray count and beneficial insects were recorded every week from five randomly selected plants from each plot
until the thrips populations were reach economic threshold level (5-10 thrips/plant). After the population of onion
thrips reached economic threshold level the insecticides were sprayed and post spray count was taken after 24 hours.
Yields data was also weighed to determine plants response to the thrips infestation resulting from insecticides.