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Biological control of brown planthopper in Indonesia”
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Subject: Biological control of brown planthopper in Indonesia”
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From: biotec@goliat.ugr.es
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Date: 28 Nov 1996 16:18:40 GMT
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Article: 16835 of alt.sustainable.agriculture
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Newsgroups: alt.sustainable.agriculture
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Organization: Centro Informatico Cientifico de Andalucia
A project entitled “Biological control of brown planthopper in
Indonesia” lead by Professor M. F. Claridge, of, School of Pure and
Applied Biology, United Kingdom, in partnership with other
scientific institutions in Indonesia, Deutschland and United
Kingdom was carried out under the European Union (D.G.XII) STD2
scientific programme.
As it is said in the introduction of the summary report “ rice is
among the world’s food crops, providing a staple food for more than
two billion people in Asia and hundreds of millions of people in
Africa and Latin America. In order to achieve sustainable
agriculture it is necessary to develop a biological control
strategy as part of Integrated Pest Management (IPM). Biological
control of the brown planthopper (BHP), Nilaparvata lugens (Stål)
(Homoptera, Delphacidae), is an important component of rice IPM.”
The objective of the project was the brown planthopper (BHP) and
the field study was carried out in 1991 and 1992, considering two
sites, a high and a low density area in relation to the pest
population.
Although different natural enemies were present, the parasitoid
complex was dominated in number by Oligosita species, according to
parasitism experiments which shown a 50 % reduction on egg hatching
of BHP when plants were exposed to the activity of the parasitoids.
Another part of the biological control of BHP included the study of
entomopathogenic fungal natural enemies of the pest. Different
strains of several species of fungi, were studied under laboratory
conditions, focusing their effects on the mortality of BHP.
Metarhizium anispliae showed good results in relation to the
mortality of BHP under laboratory conditions, effect which was
confirmed for one strain in an experiment carried out under
greenhouse conditions. Some laboratory work was also done with
species Hirsutella citriformis, M. flavoviride and Beauveria
bassiana. Results of applications in the field were not adequately
consistent.
The study shows interesting perspectives regarding the control of
BHP, but further work is still needed in order to put in practice
the objectives of the biological control of this pest in rice both
by arthropod or fungi as natural enemies.
Within this project several publications have been issued.
For further information please contact:
Professor M. F. Claridge
University of Wales, Cardiff
School of Pure and Applied Biology
POB 915 - Cardiff CF1 3TL, U. K.
Phone +44-222 87 48 04
Fax +44-222 87 43 05
CONTRACT TS2- A -255