The Biology and Ecology of Busseola fusea and Sesamia Species in South-Western Nigeria. I. Distribution and Population Studies
The Biology and Ecology of Busseola fusea and Sesamia Species in South-Western Nigeria. I. Distribution and Population Studies
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尼日利亚西南部 Busseola fusea 和 Sesamia 物种的生物学和生态学。
DOI：
10.1093/jee/61.3.830
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发表时间：
1968
期刊：
影响因子：
--
通讯作者：
E. J. Usua
中科院分区：
文献类型：
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作者：
E. J. Usua
1964年11月至12月，研究了玉米螟Busseola fusca Fuller、Sesamia calamistis Hampson和S.penniseti Bowden在尼日利亚西南部的分布。
玉米抽样调查结果表明，褐飞虱比斑潜蝇的数量更丰富。青枯病流行于南方较潮湿的低地热带雨林区，而斑潜蝇则普遍分布，在该地区的干旱稀树草原地区更为普遍。狼尾草种类不多，分布很稀疏。
玉米植株上卵块的位置有明显差异。褐飞虱的卵块都在距玉米轮虫30英寸以内，而斑潜蝇卵块则分布在距玉米轮虫更远的地方。这种分布似乎与B.fusea和S.calamistis的幼虫习性有关。
幼虫种群研究表明，在伊巴丹(可能还有尼日利亚西南部)，玉米上每年有4代青枯病。4月至7月发生2代，9-10月发生1代，11月发生1代。进入旱季滞育的是11月世代的幼虫，第二年才发育出第一代成虫。Calamistis，虽然没有B.fusca那么多，但被观察到全年都有繁殖。
The distribution of maize stem borers, Busseola fusca Fuller, Sesamia calamistis Hampson, and S. penniseti Bowden, throughout south-western Nigeria was studied between November and December 1964.
The maize-sample survey revealed that B. fusca was more abundant than S. calamistis . While B. fusca was prevalent in the southerly, more humid lowland rainforest zones, S. calamistis was generally distributed and was more prevalent in the dry savanna zones of the region. S. penniseti was not abundant and was very sparsely distributed.
There was a marked difference in the position of egg masses on the maize plants. All egg masses of B. fusca were laid within 30 inches of the maize whorl, while S. calamistis egg masses were spread over greater distances from the whorl. This distribution appears to be associated with the larval habits of both B. fusea and S. calamistis .
Larval populations studies revealed that in lbadan (and probably south-western Nigeria) there are 4 generations of B. fusca in maize per annum. There are 2 generations between April and July, 1 in September-October, and another in November. It is the larvae of the November generation which go into the dry-season diapause and which later give rise to the 1st-generation adults the following year. S. calamistis ,, although not so numerous as B. fusca , was observed to breed throughout the year.