Peter A. C. Ooi

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Three major primary parasitoids of the diamondback moth, Plutella xylostella (L.), are found in the Cameron Highlands, Malaysia. Cotesia plutellae (Kurdjumov) was discovered in the early 1970s, Diadegma semiclausum (Hellén) and Diadromus collaris (Gravenhorst) were introduced in the mid 1970s from New Zealand and Australia. Field studies in the early 1980s(More)
Under laboratory conditions,Tetrastichus sokolowskii Kurdj. attacksPlutella xylostella larvae of all ages. Development time took from 13 to 19 days. The number of adult parasitoids that emerged per pupa was 8.6±0.2, of which 17.3%±1.2% were ✗. Males were smaller (1.11±0.04 mm) than ♀ ♀ (1.38±0.04 mm). About 62.7±16.9 offspring could be produced per ♀ ♀ and(More)
Research into biological control of Mikania micrantha Kunth (Asteraceae) started in 1978, concentrating on insect agents. Host specificity studies on the first agent, Liothrips mikaniae (Priesner) (Thysanoptera, Phlaeothripidae) from Trinidad were completed by 1982, and the thrips was released in the Solomon Islands in 1988 and, subsequently in Malaysia in(More)
Traditionally, rice farmers in Asia were thought to be unable to comprehend biological control because it was too esoteric. This perception was exacerbated by vested interest that prefers to maintain monopoly of information. Hence, between 1950 to 1990, the preferred method of extending technical information to farmers was to package them in “simplistic”(More)
An Integrated Pest Management (IPM) Farmer Field School (FFS) is a field-based activity that lasts a full cropping season. A typical FFS meets once a week and 25-30 farmers participate in an FFS. In addition to group dynamics activity and a special topic session, an FFS emphasizes scientific learning through experimentation. Biological control is discussed(More)
Laboratory studies were conducted to determine some of the attributes ofDiadegma cerophagus Gravenhorst, a parasite introduced to controlPlutella xylostella (L.). Longevity studies have shown that ♂ and ♀ could live for 40 and 73 days respectively when fed on diluted honey. The parasite is capable of attacking an average of 117±10 caterpillars per ♀. The(More)
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