作 者：
曾燕蓉;朱方容;林强;朱光书;崔秋英;邱长玉;张朝华
摘 要：
分别在家蚕4龄眠起与5龄眠起时推迟饷食以及在5龄第3天进行饥饿处理,调查蚕体的生长发育、产茧和产卵情况,为制定新的家蚕共育模式技术规范以及一代杂交种生产的发蛾调节技术规范等提供试验依据。4龄起蚕推迟8 h饷食对幼虫5龄经过、全茧量、茧层量、茧层率、蛹体质量及蚕蛾羽化率、产卵量和良卵率均没有不利的影响;推迟16 h、24 h饷食,雌蚕的5龄经过延长及熟蚕体质量、全茧量、蛹体质量等性状成绩显著下降(P<0.05),对雄蚕的影响较小(P>0.05)。5龄起蚕分别推迟8 h、16 h、24 h饷食,5龄经过延长,熟蚕体质量、全茧量、茧层量、蛹体质量及产卵量、良卵数量等均显著下降(P<0.01)。5龄第3天幼虫分别饥饿12 h、24 h,熟蚕体质量、全茧量、茧层量和蛹体质量均显著下降(P<0.01);饥饿48 h后结茧率显著下降(P<0.01),雌蚕和雄蚕分别仅为60.67%、42.66%。依据试验结果建议:农村养蚕如采用集中共育至4龄起蚕的模式,为方便共育蚕的分发配送,可适当推迟4龄起蚕的饷食时间,但推迟时间不应超过8 h;家蚕一代杂交种生产过程可将4龄起蚕饷食时间推迟8~16 h,调节对交品种发育进度;无论丝茧育还是种茧育,均不宜使旺盛生长期的5龄幼虫遭受饥饿,需预先调节好桑叶的充足供给。
译 名：
Impact of Starvation During Grown Larva Stage on Silkworm Growth,Development and Characters of Cocooning and Laying Eggs
作 者：
Zeng Yanrong;Zhu Fangrong;Lin Qiang;Zhu Guangshu;Cui Qiuying;Qiu Changyu;Zhang Chaohua;Sericultural Research Institute of Guangxi Zhuang Automomous Region;
关键词：
Silkworm larva;;Starvation;;Growth and development;;Cocooning;;Laying eggs
摘 要：
Through delayed feeding to the newly exuviated silkworm( Bombyx mori) larvae of the 4 th and 5 th instars,and through starvation treatment to day 3 larvae of the 5 th instar,the impact of starvation on silkworm growth,development and the performance of cocooning and laying eggs was investigated,which was aimed to provide experimental references for establishing new technological criteria of cooperative silkworm rearing and of moth emergence regulation in F1 hybrid egg production. It was found that an 8 h delay in feeding the newly exuviated larvae of the 4 th instar had no adverse effect on duration of the 5 th instar,cocoon weight,cocoon shell weight,cocoon shell rate,pupa weight,moth eclosion rate,number of laid eggs,and good egg rate. A 16 h and 24 h delay in feeding the newly exuviated larvae of the 4 th instar led to prolonged duration of the 5 th instar and significant declines in mature larva weight,cocoonweight,and pupa weight of the female silkworm( P < 0. 05),while the same treatment had less effect on those of male silkworm( P > 0. 05). An 8 h,16 h and 24 h delay in feeding the newly exuviated larvae of the 5 th instar led to prolonged duration of the 5 th instar and extremely significant declines in mature larva weight, cocoon weight, cocoon shell weight, pupa weight,number of laid eggs,and number of good eggs( P <0. 01). After day 3 larvae of the 5 th instar were starved for 12 h and 24 h, mature larva weight, cocoon weight, cocoon shell weight and pupa weight all dropped extremely significantly( P < 0. 01). The larvae under severe starvation treatment( 48 h) had extremely significantly lowered cocooning rate( P < 0. 01),which was 60. 67 % and 42. 66 % from the female and male larvae respectively. Based on these results,it is suggested that,if a centralized cooperative rearing pattern is adopted to supply the 4 th instar larvae for farmers,a less than 8 h delay in feeding the newly exuviated larvae of the 4 th instar is appropriate for the convenience of distributing and dispatching the cooperatively reared silkworm larvae. In F1 hybrid egg production,an 8 ~ 16 h delay in feeding the newly exuviated larvae of the 4 th instar is appropriate for adjustment of developmental status of the crossing varieties. In rearing silkworm for both cocoon and egg productions,sufficient mulberry leaf supply should be schedule in advance to prevent the 5 th instar vigorously growing larvae from undergoing any starvation.
