Alternative control strategies against stored product insect pests
1994
de Pedro, L.B. | de Pedro, R.C. Jr.
Studies on the use of crude plant extracts and controlled atmosphere storage using biogas were conducted to determine its potential on stored products insect pests. Using the dip method, concentrations of 75 and 100 percent of neem bark extract resulted to 61.25 and 72.5 per cent mortality on corn weevil respectively. Extracts from vines of makabuhai resulted to high mortality ranging from 65-100 percent on mungbean weevil at 40-100 percent concentrations. Tubli root extract is effective on Copra beetle resulted to 72-93 percent mortality after 72 hours of exposures to treated materials. It is also effective on corn weevil from concentrations 1.0-4.5 percent with an average per cent mortality ranging from 47-84 percent. Using 1.5 ml biogas per gram of corn kernels, mungbean seeds, and copra cubes resulted to 95 percent mortality on corn weevil after three days of exposure, 92 percent on mungbean weevil and only 81 percent on copra beetle despite seven days of exposure. At 0.9 ml biogas per gram of seeds, the average mortality decreased to 92, 84, and 40 percent for corn weevil, mungbean weevil and copra beetle respectively
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