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Prevalence, succession and population built up of rangeland grasshoppers under Jhansi conditions

机译:詹西条件下草地蝗虫的流行,演替和种群增加

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Grasshoppers are the most conspicuous and problematic pests and are primary consumers in most of the temperate and tropical grassland ecosystems (Smalley, 1960; Vanhook, 1971; Wiegert, 1965). Losses in forage yields due to grasshoppers have been evaluated to the tune of 6-12 per cent by Cowan (1958), 25.9-62.1 per cent by Anderson (1961) and 18.35 percent by Shah et al. (1991). In order to evolve ecologically sound and economically feasible pest management strategies, information on prevalence, succession and population built up of insect pests are pro-requisite. These aspects of various grasshopper species of Rajasthan have been studied by Kushwaha and Bhardwaj (1977) and for Bilaspur region of Madhya Pradesh by Dwivedi and Chattoraj (1984).
机译:蝗虫是最明显和最成问题的害虫,是大多数温带和热带草原生态系统的主要消费者(Smalley,1960; Vanhook,1971; Wiegert,1965)。 Cowan(1958)将草grass造成的草料产量损失估计为6-12%,Anderson(1961)估计为25.9-62.1%,Shah等人估计为18.35%。 (1991)。为了发展生态上合理且在经济上可行的有害生物管理战略,有关有害生物的流行,演替和种群数量的信息是必不可少的。 Kushwaha和Bhardwaj(1977)研究了拉贾斯坦邦各种蚱grass物种的这些方面,Dwivedi和Chattoraj(1984)研究了中央邦的Bilaspur地区。

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