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Abundance and Spatial Dispersion of Rice Stem Borer Species in Kahama Tanzania

机译:坦桑尼亚卡哈马稻干Bor种的丰度和空间分布

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摘要

Species diversity, abundance, and dispersion of rice stem borers in framer’s fields were studied in four major rice growing areas of Kahama District. Stem borer larvae were extracted from the damaged tillers in 16 quadrants established in each field. Adult Moths were trapped by light traps and collected in vials for identification. Results indicated the presence of Chilo partellus, Maliarpha separatella, and Sesamia calamistis in all study areas. The most abundant species was C. partellus (48.6%) followed by M. separatella (35.4%) and S. calamistis was least abundant (16.1%). Stem borers dispersion was aggregated along the edges of rice fields in three locations (wards) namely: Bulige, Chela, and Ngaya. The dispersion in the fourth ward, Kashishi was uniform as established from two of the three dispersion indices tested. Further studies would be required to establish the available alternative hosts, the extent of economic losses and the distribution of rice stem borers in the rest of the Lake zone of Tanzania.
机译:在Ka滨地区的四个主要水稻种植区,研究了frame稻田中稻stem的物种多样性,丰度和分布。在每个田间建立的16个象限中,从受损的分ers中提取bore虫幼虫。用光阱诱捕成年蛾,并收集在小瓶中进行鉴定。结果表明在所有研究区域中都存在Chilo partellus,Maliarpha sepllla和Sesamia calamistis。最丰富的物种是念珠菌(C. partellus)(48.6%),其次是分离支原体(M. sepllla)(35.4%),而S. calamistis最不丰富(16.1%)。茎bore的散布在三个区域(向内)的稻田边缘聚集:布利格,切拉和恩加亚。根据测试的三个分散指数中的两个,在第四区喀什市分散是均匀的。尚需进一步研究,以确定可利用的替代宿主,经济损失的程度以及坦桑尼亚湖区其余地区稻stem的分布。

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