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No evidence for an effect of Wolbachia on mtDNA variation and evolution in natural populations of sesamia inferens(Lepidoptera: Noctuidae)

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Journal of Integrative Agriculture 2019年第5期18卷 1050-1063页

作者： TANG Xiao-tian XU Jing LU Ming-xing DU Yu-zhou School of Horticulture and Plant Protection & Institute of Applied Entomology Yangzhou University Department of Entomology Texas A&M University Joint International Research Laboratory of Agriculture and Agri-Product Safety Ministry of Education/Yangzhou University

Wolbachia are widespread maternally-inherited endosymbiotic bacteria that infect numerous *** study represents a thorough survey of the Wolbachia infection patterns in the pink stem borer,sesamia inferens(Walker),an important rice pest in China,based on nucleotide comparisons for the surface protein(wsp)and cell division protein(ftsZ)*** effects of Wolbachia on mtDNA variation and evolution of *** were also *** we identified six genetically diverse strains,we found infections to be infrequent,with only 7.8%of hosts infected,and identified geographical differences in infection rates between southern and northern *** indexes(haplotype diversity(Hd),nucleotide diversity(π)and number of variable sites(S)of mtDNA in infected populations were not significantly lower or higher than that in the uninfected ***,there was no association between Wolbachia infection status and phylogeny of mtDNA *** of molecular variance(AMOVA)showed that significant differentiation mainly existed within groups rather than among the ***,using Tajima’s D and Fu’s F values,the mtDNA genes did not deviate significantly from neutral *** together these results indicate that currently there were no effects of Wolbachia infection on host mtDNA variation and evolution in ***.

关键词： Wolbachia sesamia inferens effect mtDNA prevalence

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Insecticidal activity of the medicinal plant,Alstonia boonei De Wild,against sesamia calamistis Hampson

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第10期8卷 752-755页

作者： OIGIANGBE Osawe Nathaniel IGBINOSA Igho Benjamin TAMO Manuele Department of Zoology Ambrose Alli University Ekpoma Edo State Nigeria International Institute of Tropical Agriculture Cotonou Station Cotonou Republic of Benin

The bioactivity of the aqueous extracts of the leaf and stem bark of the medicinal plant, Alstonia boonei De Wild (Apocyanaceae), against the pink stalk borer, sesamia calamistis Hampson (Lepidoptera: Noctuidae) was studied in a laboratory bioassay. The extracts were incorporated into artificial diet at a rate of 0.0% (control), 1.0%, 2.5%, 5.0%, and 10.0% (w/w). Both extracts significantly (P<0.01) reduced larval survival and weight in a dose dependent manner. The concentrations that killed 50% of the larvae (LC50) for the stem bark extract were 2.8% and 2.1% at 10 and 20 DAI (days after introduction), respectively, while those for the leaves extract were 5.6% and 3.5%. The weights of the larvae also varied significantly (P<0.05) between the treatments in a dose dependent manner. We conclude that both leaf and stem bark extracts of A. boonei are toxic, used as growth inhibitors to S. calamistis larvae, and hold good promise for use as alternative crop protectants against S. calamistis.

关键词： Alstonia boonei Extract sesamia calamistis Toxicity Growth inhibitors

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大螟(sesamia grisescens)为害甘蔗其品质和产量的变化

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广西蔗糖 1998年第2期 58-61页

作者： D.Eastwood P.J.Malein G.R.Young 谭裕模

甘蔗梢部螟虫（Ｓｅｓａｍｉａｇｒｉｓｅｓｃｅｎｓ大螟）是巴布亚新几内亚（ＰＮＧ）拉穆蔗区的一个为害严重的甘蔗害虫。幼虫为害顶端分生组织，估计每１％的茎害率将造成０．３６吨／公顷的蔗茎减产。蔗茎顶部苗腐病（Ｆｕｓａｒｉ... 详细信息

甘蔗梢部螟虫（Ｓｅｓａｍｉａｇｒｉｓｅｓｃｅｎｓ大螟）是巴布亚新几内亚（ＰＮＧ）拉穆蔗区的一个为害严重的甘蔗害虫。幼虫为害顶端分生组织，估计每１％的茎害率将造成０．３６吨／公顷的蔗茎减产。蔗茎顶部苗腐病（Ｆｕｓａｒｉｕｍｓｐｐ．）腐烂真菌的入侵使损失进一步扩大。当幼虫钻洞为害扩展到蔗茎的节间，每１％的节间虫口率就造成０．１５％的蔗糖损失。蔗茎顶部幼嫩节间的受害损失比基部较老的节间的损失要高。幼虫钻洞的结果造成节间纤维分、葡萄糖、果糖含量增加，葡萄糖与果糖的比率下降，表明葡萄糖被受害组织或被入侵的微生物优先利用。受害节间以密三糖的含量增加为特征，而非受害蔗密三糖的含量非常低。

关键词：大螟巴布亚新几内亚稻蛀茎夜蛾水稻害虫大洋洲 grisescens sesamia 螟害糖料作物甘蔗产量

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