Biological control of longan stink bug, Tessaratoma papillosa Drury in Thailand

Nanta, P.

Les Colloques de l'INRA 43: 525-526

1988


ISSN/ISBN: 0293-1915
Accession: 001764903

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Abstract
The natural enemies of the pentatomid Tessaratoma papillosa were surveyed in longan [Dimocarpus longan] orchards in Thailand during 1981-84. Two species of egg parasitoids, an Anastatus species near A. japonicus and Ooencyrtus phongi were important biological control agents. The highest recorded parasitism of pentatomid eggs by these 2 species was 47.78% (in 1981) and 59.41% (in 1982), respectively. The occurrence of the parasitoids was not synchronous with the seasonal occurrence of the pentatomids, so in 1984 the augmentation of populations of Anastatus sp. was studied in the field. Anastatus was released twice (20 000 parasitoids) at the beginning of the longan season (February), resulting in suppression of the pest population and 100% parasitism of host eggs at the end of March. It is concluded that control of T. papillosa by releasing Anastatus sp. could decrease the cost of pesticide applications by about 500 bath/rai (2.5 rai = 1 acre).