Utilization of an egg parasitoid in rice black bug management
2003
Estoy, A.B. | Tadle, P.J. | Batay-an, E.H. | Balleras, G. (Philippine Rice Research Inst., Agusan del Norte (Philippines))
Monitoring and collection of egg masses of rice black bug, Scotinophara coarctata Fabr., was done to determine field occurrence of egg parasitoid Telenomus triptus. Based on parasitized eggs, T. triptus was more abundant (55% parasitism). Laboratory evaluation on the effect of the number of egg parasitoids on egg parasitism showed that percentage egg parasitism increased as the number of egg parasitoids increased. Highest parasitism (87%) was observed two days after release of two egg parasitoids/egg mass. Daily observation on egg parasitism showed that parasitism increased with time regardless of the number of egg parasitoids released. Percentage parasitism decreased as the number of egg masses increased. Field evaluation showed the highest parasitism (72%) or 81% increase in parasitism in fields released with 168,000 newly emerged parasitoids/ha
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Este registro bibliográfico ha sido proporcionado por University of the Philippines at Los Baños