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首页> 外文期刊>The Kasetsart Journal >Species Diversity of Cotton Insect Pests
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Species Diversity of Cotton Insect Pests

机译：棉花害虫的物种多样性

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Field experiments were conducted at Suwan Farm, Northeastern Thailand during two growing periods of 2000 and 2001 to determine the species diversity and abundance of insect pests of cotton. Randomized Complete Block Design (RCB) was arranged with four replications of sixteen plots of four cotton varieties/lines. Weekly sampling was performed by visual count and pan trap methods. Species diversity of insect pests was analyzed by Shannon-Weaver diversity index. Species abundance of insect pests was computed for each crop together with eight sampling dates. Species ranking was also developed from species abundance. The results showed that insect pests were greatly abundant during the first crop while low diversity indices were observed. During the second crop there was less appearance of insect pest. "The total species abundance of all varieties/lines ranged from 10 (cotton spiny bollworm, Earias sp.), to 11,431 (cotton leafhopper, Amrasca biguttula Ishida), in the first crop and from 11 (Earias sp.), to 1,955 (A. biguttula), in the second crop. The ranges of species diversity indices were from 0.27 [Sri Samrong 60 (SR 60)] to 0.62 [Sarid 1 (SD1)], in the first crop and from 0.61 (SR 60) to 0.83 (SD1), in the second crop. A. biguttula was observed to be the dominant species in both crops. Other insect pests with less obvious importance were Thrips palmi, Bemisia tabaci, Aphis gossypi, Megacoelum biseratense and Carpophilus sp. Although total of 28 species found on cotton, only 13-14 insect pests appeared in the cotton field regularly. Two rare species did not occur on some cotton varieties/lines during the second crop.
机译：在2000年和2001年的两个生育期，在泰国东北部的Suwan农场进行了田间试验，以确定棉花的种类多样性和害虫数量。安排了随机完整块设计（RCB），对四个棉花品种/品系的十六个样地进行了四次重复。每周取样是通过视觉计数和捕集阱方法进行的。利用香农-韦弗多样性指数分析了害虫的物种多样性。计算了每种作物的虫害物种丰富度以及八个采样日期。物种排名也从物种丰富度发展而来。结果表明，害虫在第一季作物中非常丰富，而多样性指数却很低。在第二季作物中，虫害很少出现。 “所有品种/品系的总物种丰度范围从第一季的10种（棉棘铃虫，Earias sp。）到11,431种（棉叶蝉，Amrasca biguttula Ishida），从11种（Earias sp。）到1,955（第二作物的物种多样性指数范围在第一作物中为0.27 [Sri Samrong 60（SR 60）]至0.62 [Sarid 1（SD1）]，在第一作物中为0.61（SR 60）。在第二季作物中为0.83（SD1），观察到两种作物均以大肠。虫为主要物种，其他重要性较低的害虫为棕榈蓟马，烟粉虱，棉蚜，双子叶麦草和Carpophilus sp。在棉花上发现了28种，只有13-14种害虫定期出现在棉田中，在第二季作物的一些棉花品种/品系上没有出现两种稀有物种。

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