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首页> 外文期刊>Journal of entomology >Improvement in cocoon yield induced by a juvenile hormone analogue, SB-515 in the bivoltine silkworm (Bombyx mori L.) hybrid, CSR2 x CSR4 and its reciprocal combination.
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Improvement in cocoon yield induced by a juvenile hormone analogue, SB-515 in the bivoltine silkworm (Bombyx mori L.) hybrid, CSR2 x CSR4 and its reciprocal combination.

机译：少年激素类似物SB-515在双伏蚕（Combinex mori L.）杂交种CSR2 x CSR4及其相互结合中诱导的茧产量提高。

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摘要

A juvenile hormone analogue JHA, SB-515 (Isopropyl (2E, 4E)-11-methoxy-3,7,11 trimethyl-2-1,4-dodecadienoate) was administered to the popular and high yielding bivoltine silkworm hybrid CSR2 x CSR4 and its reciprocal cross for enhancing the cocoon yield. The compound was administered at 24, 48 and 72 h of 5th instar at concentrations such as 1.25, 2.5 and 5 ppm as a single dose. Untreated controls were maintained in parallel to compare the results. Apart from measuring the major commercial traits pertaining to cocoon yield, larval growth pattern was studied. The JHA extended the larval feeding period in the range of 6-48 h depending on the concentration of the compound and the time of administration. SB-515 improved the cocoon traits such as cocoon weight, shell weight and cocoon shell percentage significantly. Maximum increase in the case of CSR2 x CSR4 was observed in the larvae treated with 2.5 ppm at 48 h whereas, in CSR4xCSR2 this was in the larvae treated at 72 h with the same concentration. Since the enhancement in the cocoon yield is substantial on JHA administration the compound can be exploited in the commercial sericulture.
机译：将少年激素类似物JHA SB-515（异丙基（2E，4E）-11-甲氧基-3,7,11三甲基-2-2-1,4-十二碳二烯酸酯）施用到受欢迎的高产量双伏蚕杂交种CSR2 x CSR4和它的对立杂交以提高茧产量。该化合物在第5龄24、48和72小时以单一剂量（例如1.25、2.5和5 ppm）的浓度给药。平行保持未经处理的对照以比较结果。除了测量与茧产量有关的主要商业性状外，还研究了幼虫的生长方式。根据化合物的浓度和给药时间，JHA将幼虫的摄食时间延长了6-48小时。 SB-515显着改善了茧的性状，如茧重，壳重和茧壳百分率。在48小时用2.5 ppm处理的幼虫中观察到CSR2 x CSR4的最大增加，而在CSR4xCSR2中在相同浓度处理72 h的幼虫中观察到最大增加。由于在JHA施用时茧产量的提高是实质性的，因此该化合物可用于商业蚕桑中。

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