| 大豆食心虫幼虫结茧次数的影响因素及其对低温环境适应性的影响 |
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| 引用本文：夏婷婷,徐伟,李旋,崔娟,史树森.大豆食心虫幼虫结茧次数的影响因素及其对低温环境适应性的影响.植物保护学报,2019,46(4):885-893 |
| DOI：10.13802/j.cnki.zwbhxb.2019.2018107 |
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| 中文摘要:为明确大豆食心虫Leguminivora glycinivorella幼虫结茧次数及其相关因子以及结茧次数对其低温环境适应性的影响，通过人工剥茧扰动间隔持续观察法测定大豆食心虫越冬幼虫结茧次数，分析结茧次数与体重、茧重的关系，同时测定不同结茧次数虫体的过冷却点、结冰点及虫体海藻糖含量和虫茧蛋白氨基酸组成，并在自然环境条件下检测其越冬存活率。结果显示，大豆食心虫越冬幼虫有很强的结茧能力，其平均结茧次数为9.86次。幼虫体重影响其结茧次数，结茧次数与其体重呈显著负相关（y=14.8231-0.5456x，R2=0.9223）；性别对其结茧次数无显著影响。虫茧蛋白由16种氨基酸组成，各氨基酸组分含量与结茧次数均呈直线负相关。随着结茧次数增加，越冬幼虫过冷却点和冰点值均有所升高，结茧1次的过冷却点平均值为-18.19℃，显著低于结茧3次和5次的过冷却点；越冬幼虫体内海藻糖相对含量随结茧次数增加呈下降趋势；幼虫越冬存活率与结茧次数呈显著负相关，结茧1次、结茧2次和结茧3次的越冬存活率分别为66.05%、36.05%和13.60%，三者之间差异显著。表明大豆食心虫越冬幼虫随着结茧次数的增加其对低温环境适应性显著降低。 |
| 中文关键词:大豆食心虫 越冬幼虫 结茧次数 环境适应性 越冬存活率 |
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| Influence factors of cocooning time of soybean pod borer Leguminivora glycinivorella larvae and its effects on adaptive capacity in cold environments |
| Author Name | Affiliation | E-mail | | Xia Tingting | College of Plant Protection, Jilin Agricultural University, Changchun 130118, Jilin Province, China | | | Xu Wei | College of Plant Protection, Jilin Agricultural University, Changchun 130118, Jilin Province, China | | | Li Xuan | College of Plant Protection, Jilin Agricultural University, Changchun 130118, Jilin Province, China | | | Cui Juan | College of Plant Protection, Jilin Agricultural University, Changchun 130118, Jilin Province, China | | | Shi Shusen | College of Plant Protection, Jilin Agricultural University, Changchun 130118, Jilin Province, China | sss-63@263.net |
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| Abstract:To clarify the cocooning time of soybean pod borer Leguminivora glycinivorella larvae and its adaptive capacity in cold environments, the larvae cocooning times were determined with the continuous observation method of stripping artificially cocoons interval and the relationships between the cocooning time and weight of the body and cocoon were analyzed. The supercooling point, freezing point, trehalose content of larvae and amino acid composition of cocoons protein were measured at different cocooning times. The results showed that the larvae had strong ability to re-cocooning, the average cocooning time was 9.86. A significant negative correlation between the cocooning time and body weight accorded with equation y=14.8231-0.5456x (R2=0.9223), but sex had no significant effect on the cocooning time. The cocoon protein was composed of 16 kinds of amino acids, and the content of each amino acid was negatively correlated with the cocooning time. With the cocooning time increasing the supercooling point and freezing point both increased, and the supercooling point of cocooning for one time was -18.19℃ which was significantly lower than that of larvae cocooning for three times and five times. The relative content of trehalose of larvae showed a downward trend. The overwintering survival rate was negatively correlated with the cocooning times, the overwintering survival rate of larvae with cocooning for one time, two times, three times was 66.05%, 36.05% and 13.60%, there were significant differences among them. In conclusion the cold tolerance of overwintering larvae of L. glycinivorella significantly reduced with the cocooning time increased. |
| keywords:Leguminivora glycinivorella overwintering larvae cocooning ability environmental adaptability survival rate of overwintering |
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