期刊名称：Pertanika Journal of Social Sciences & Humanities
印刷版ISSN：0128-7702
电子版ISSN：2231-8534
出版年度：1997
卷号：20
期号：1
出版社：Universiti Putra Malaysia
摘要：Presence-absence sequential sampling plans are presented for 11 arthropod categories to assist in management oftheir populations in the multipest-infested rice crop in Malaysia. Data from visual inspection o f204 samples, with 40 and 100 hills per sample were used to develop the plans. Action threshold for each of the 11 (5 pests, 6 predators) arthropod categories was obtained through a fourth-order polynomial regression of proportion of infestation against mean population densities, at the point of saturation of infestation. The pest species are: Nephotettix spp., Nilaparvata lugens, Recilia dorsalis, Sogatella furcifera and Cnapholocrocis medinalis (Pyralidae), and the predators: Cyrtorhinus lividipennis, Anatrichus pygmaeus (Diptera), spiders, Odonata, Paederus fuscipes and Casnoidea spp. Risk levels of Type I (a) and Type I I error (f3) were prefixed at 0.3, since lower levels entail taking a larger number of samples. The sequential plans were then generated using the SEQUAN computer program of Talerico and Chapman (1970). During field operation on not more than 50 ha at a time, it is suggested that at least ten hills should be examined visually before recommending any pestmanagement action. Simultaneous sampling of pests and predators enables status of predators’ populations to be considered before recommending any decision.
关键词：Insecta; rice; pest management; sequential sampling; Malaysia
