Utilization of an egg parasitoid in rice black bug management
Issue Date
10-2003
Abstract
Monitoring and collection of egg masses of rice black bug, Scotinophora coarctata Fabr., was done to determine field occurrence of egg parasitoid Telenomus triptus. based on parasitized eggs, T. triptus was more abundant (55% parasitism) during the early stages of crop growth than during the reproductive stage (24% 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 with 168,000 newly emerged parasitoids/ha.
Source or Periodical Title
Philippine Entomologist
ISSN
0048-3753
Volume
17
Issue
2
Page
184
Document Type
Article
Frequency
semi-annually
Language
English
Recommended Citation
Estoy, A. B.; Tadle, P. J.; Batay-an, E. H.; and Balleras, Gi., "Utilization of an egg parasitoid in rice black bug management" (2003). Journal Article. 5704.
https://www.ukdr.uplb.edu.ph/journal-articles/5704
En – AGROVOC descriptors
SCOTINOPHARA; PESTS; PLANT PESTS; PARASITOIDS; PARASITISM; BIOLOGICAL CONTROL AGENTS; PEST MANAGEMENT