Monitoring populations of the brown planthopper, Nilaparvata lugens (Stal), the green leafhopper, Nephotettix virescens (Distant) and spiders in rice at Maquiapo, Guagua, Pampanga [Philippines]
1990
Bayot, R.G. | Cayabyab, B.F. | Benigno, E.A. | Ebuenga, M.P. | Penalba, F.P. (Philippines Univ., Los Banos, College, Laguna (Philippines). National Crop Protection Center)
The relative abundance of the brown planthopper (BPH), Nilaparvata lugens (Stal), the green leafhopper (GLH), Nephotettix virescens (Distant) and spiders was monitored on three rice varieties at Maquiapo, Guagua, Pampanga [Philippines]. The efficiencies of the sampling devices, viz., sweep net, yellow gallon trap and trapezoidal steel cage were compared. Weekly catches from three rice varieties, IR-22, IR-36, and IR-50 were counted 14 days after transplanting up to the booting stages. GLH mean count from sweep net was significantly higher than mean count from trapezoidal steel cage and yellow gallon trap. BPH catches for yellow gallon trap and sweep net were statistically the same while trapezoidal visual count was statistically lower. The yellow gallon trap was expected to have the highest catch because of its color. The combined mean counts for the three rice varieties were not statistically different. As to the sampling devices the sweep net gave significantly higher mean count compared to the yellow gallon trap and trapezoidal steel cage.
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