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Results of field studies of egg and nymphal parasites of Sogatella furcifera, Nila-palvata lugens and Nephotettix nigropictus made in Thailand in 1977 are present-ed. Two species of egg parasites, Oli...gosita sp. and Anagrus optabilis, were rear-ed from Sogatella furcifera, 1 species of egg parasite, Anagrus optabilis, was rear-ed from Nilaparvata lugens, and 2 species of egg parasites, Paracentrobia sp. and Gonatocerus sp. were reared from Nephotettix nigropictus. Paracentrobia s p. a nd Gonatocerus sp. were found to be ecologically similar species inhabiting the same rice paddy and parasitize even the same egg-mass of Nephotettix nigropictus. Lar-vae of dryinid wasps were detected from Sogatella furcifera, Nilaparvata lugens and Nephotettix nigropictus. Stylopids were also detected from the 3 rice hoppers mentioned above. Nephotettix nigropictus is recorded as a new host of Strepsi-ptera in Thailand.続きを見る
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