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首页> 外文期刊>Ciência e Agrotecnologia >Oviposition preference and larval performance of sugarcane borer in eight sugarcane genotypes
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Oviposition preference and larval performance of sugarcane borer in eight sugarcane genotypes

机译：八种基因型甘蔗of虫的产卵偏好和幼虫性能

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摘要

ABSTRACT The sugarcane borer Diatraea saccharalis Fabr. (Lepidoptera: Crambidae) is one of the most important pests of sugarcane in the Americas. The purpose of this study was to assess multiple resistance traits in eight sugarcane genotypes against D. saccharalis, including five commercial cultivars and three exotic germplasm with potential to serve as resistance sources against this pest. The oviposition preference was assessed by using both free-choice and non-choice tests. The performance of both early stage larvae feeding on the leaves and late stages larvae feeding within the stalks were also assessed. There were differences among genotypes for number of both eggs and egg cluster in the free-choice test while no differences in non-choice test were observed. There were also differences in survival of early stage larvae feeding on the leaves, foliar injury rating and stalk damage. The genotype IM76-228 was the least preferred for oviposition and it seems that leaf width had some influence on adults?￠???? preference rather than greening of the leaves. IM76-228 and RB867515 causes higher mortality of early stage larvae feeding in the stalks while IM76-228 and RB985523 had lower damage in both leaves and stalks. The genotype IM76-228 was the most resistant to D. saccharalis and could serve as genes sources for resistance in sugarcane breeding programs. Index terms:???? Saccharum spp.; Diatraea saccharalis; host-plant resistance.
机译：摘要甘蔗蛀虫Diatraea saccharalis Fabr。 （鳞翅目：Crambidae）是美洲甘蔗中最重要的害虫之一。这项研究的目的是评估八种甘蔗对D. saccharalis的抗性，包括五个商业品种和三个外来种质，它们有可能作为对该病虫的抗性来源。通过使用自由选择和非选择测试评估排卵偏好。还评估了叶片上早期幼虫摄食和茎内后期幼虫摄食的性能。自由选择测试中卵和卵簇数目的基因型之间存在差异，而非选择测试中未见差异。早期幼虫摄食叶片的存活率，叶损伤等级和茎杆损伤也存在差异。基因型IM76-228最不适合产卵，看来叶宽对成虫有一定影响？而不是绿叶。 IM76-228和RB867515导致茎中早期幼虫摄食的死亡率较高，而IM76-228和RB985523的叶片和茎均具有较低的危害。基因型IM76-228对蔗糖梭菌最有抗性，可以作为甘蔗育种计划中抗性的基因来源。索引字词：???？蔗糖属;糖寄主植物抗性。

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