Predation of Peregrinator biannulipes Montrouze and Sigmoret in relation to copra pest density and storage losses
1995
Zipaga, M.B. | Pacumbaba, E.P. (Philippine Coconut Authority, Banao, Guinobatan, Albay (Philippines). Albay Research Center)
The effect of predation by Peregrinator biannulipes Mont. and Sig. on copra pest density and weight losses were evaluated in three storage facilities. Three 100 kg piles of newly cooked copra with an average moisture content of 10 percent were stored. Each pile contains 75 percent copra from mature nuts while the rest are from immature nuts. In one pile, three consecutive releases of 150 predators were made every other week beginning at the first week of storage while in another pile, about 75 predators were introduced with the same frequency. Insect pest populations during the 6-month observation period were relatively lower in piles with predators. An 8.5 percent average weight loss was observed in copra stocks without predator while about 2.5 percent and 3.5 percent losses were observed in stocks with low and high number of predators released
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