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Spiders check planthopper population


, : Spiders check planthopper population. International Rice Research Newsletter 4(3): 18-19

Large numbers of spiders (average 2/hill) are seen on rice crops near Kuttanadu, Kerala, India, where the brown planthopper (Nilaparvata lugens (Stal) is endemic. Six days after insecticides had been applied during an outbreak of the planthopper on the main punja season (October-February) crop, both spider and planthopper populations were smaller than on untreated rice. Populations increased again 2 weeks after treatment.

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