Epicuticular wax chemicals of Lablab purpureus subsp. bengalensis influence short-range attraction and oviposition responses in Aphis craccivora and Aphis gossypii.

IF 1.6 3区 农林科学 Q2 ENTOMOLOGY Bulletin of Entomological Research Pub Date : 2023-12-01 Epub Date: 2023-10-19 DOI:10.1017/S0007485323000445
Sanoj Kumbhakar, Susmita Das, Anandamay Barik
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Abstract

Lablab purpureus subsp. bengalensis (Jacq.) Verdc. is an important legume of India and Africa. Both aphids, Aphis craccivora Koch and A. gossypii Glover (Hemiptera: Aphididae), are important herbivorous pests of this legume crop. These viviparous females lay nymphs on the leaf surface of this legume plant. Therefore, it is of considerable interest to study whether leaf surface wax chemicals (long-chain alkanes and free fatty acids) of this legume plant served as short-range attractants and oviposition stimulants in both females to lay nymphs. Twenty-one n-alkanes from n-C12 to n-C35 and 11 free fatty acids from C12:0 to C22:0 were identified in leaf surface waxes. Nonacosane and nonadecanoic acid were the most abundant among n-alkanes and free fatty acids, respectively. Both females were attracted towards one leaf equivalent surface wax against the control solvent (petroleum ether) in short Y-tube olfactometer bioassays. A synthetic blend of tetradecane, pentadecane, tetracosane, tridecanoic acid, tetradecanoic acid, and heneicosanoic acid comparable to one leaf equivalent surface wax served as short-range attractants and oviposition stimulants in A. craccivora; whereas a synthetic blend of tetradecane, hexadecane, docosane, nonadecanoic acid, and arachidic acid comparable to one leaf equivalent surface wax acted as short-range attractants and oviposition stimulants in A. gossypii. These results can provide the basis for efficient pest management strategies of A. craccivora and A. gossypii against L. purpureus subsp. bengalensis using host plant leaf surface wax compounds. Further, SEM studies of antennae and forelegs of both aphids were conducted to observe sensilla structures, which help in chemoreception.

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紫丁香的药用蜡化学成分。孟加拉蚜对craccivora和棉蚜的近距离引诱和产卵反应有影响。
紫泥实验室亚种。孟加拉人(Jacq.)Verdc。是印度和非洲的一种重要豆科植物。禾蚜和棉蚜(半翅目:蚜科)都是该豆科作物的重要食草性害虫。这些胎生的雌性在这种豆类植物的叶子表面产下若虫。因此,研究这种豆科植物的叶表面蜡化学物质(长链烷烃和游离脂肪酸)是否能对雌性若虫起到短程引诱剂和产卵刺激剂的作用具有重要意义。在叶片表面蜡中鉴定出21种正构烷烃(从n-C12到n-C35)和11种游离脂肪酸(从C12:0到C22:0)。在正构烷烃和游离脂肪酸中,壬二酸和癸酸含量最高。在短Y管嗅觉计生物测定中,两只雌性都被吸引到与对照溶剂(石油醚)相当的一片叶子的表面蜡上。十四烷、十五烷、二十四烷、十三烷酸、十四烷酸和二十烷酸的合成混合物相当于一片树叶的表面蜡,可作为短距离引诱剂和产卵刺激剂在A.craccivora中发挥作用;而十四烷、十六烷、二十二烷、十九烷酸和花生酸的合成混合物(相当于一片叶子的表面蜡)在棉蚜中起到了短程引诱剂和产卵刺激剂的作用。这些结果可为A.craccivora和A.gossypii对紫浆亚种的有效害虫管理策略提供依据。利用寄主植物叶片表面蜡质化合物。此外,对两种蚜虫的触角和前肢进行了SEM研究,以观察有助于化学接收的感觉器结构。
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来源期刊
CiteScore
4.00
自引率
0.00%
发文量
160
审稿时长
6-12 weeks
期刊介绍: Established in 1910, the internationally recognised Bulletin of Entomological Research aims to further global knowledge of entomology through the generalisation of research findings rather than providing more entomological exceptions. The Bulletin publishes high quality and original research papers, ''critiques'' and review articles concerning insects or other arthropods of economic importance in agriculture, forestry, stored products, biological control, medicine, animal health and natural resource management. The scope of papers addresses the biology, ecology, behaviour, physiology and systematics of individuals and populations, with a particular emphasis upon the major current and emerging pests of agriculture, horticulture and forestry, and vectors of human and animal diseases. This includes the interactions between species (plants, hosts for parasites, natural enemies and whole communities), novel methodological developments, including molecular biology, in an applied context. The Bulletin does not publish the results of pesticide testing or traditional taxonomic revisions.
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