›› 1996, Vol. 39 ›› Issue (1): 53-57.

• 研究论文 • 上一篇    下一篇

细菌冰核提高印度谷螟过冷却点的研究

冯玉香 何维勋   

  • 出版日期:1996-02-20 发布日期:1996-02-20

STUDIES ON ELEVATING THE SUPERCOOLING POINTOF INDIAN MEAL MOTH LARVAE WITH BACTERIAL ICE NUCLEATORS

Feng Yuxiang He Weixun   

  • Online:1996-02-20 Published:1996-02-20

摘要: 印度谷螟(Plodia interpunctella)是一种不耐结冰的昆虫,在冬季它通过降低过冷却 点以避免结冰。现已查明,冰核活性细菌能显著提高植物的过冷却点,导致许多作物在较高 的温度下发生霜冻害。本文也证明细菌冰核能显著提高印度谷螟虫的过冷却点。对照的平均过冷却点是-17.6℃;分别用0.1g和1g细菌冰核与1kg面粉混合后进行处理,平均过冷却点分别比对照提高了12.8℃和13.6℃。研究结果支持这样的观点:细菌冰核有可能成为一种在冬季使用的、杀灭不耐结冰害虫的生物制剂。

关键词: 细菌冰核, 过冷却点

Abstract: Indian meal moth Plodia interpunctella larvae are freeze-susceptible.In winter, they avoid freezing by lowering supercooling point. It is wellknownthat ice nucleating active bacteria can significantly elevate the supercooling point ofplants, resulting in promoting frost injury. Our study also proved that bacterialice nucleators can significantly elevate the supercooling point of Indian meal mothlarvae. In the control group, the mean supercooling point is -17.6℃. After treatment with 0.Lg and lg of bacterial ice nucleators mixed to lkg of flour, the meansupercooling point elevate 12.8℃ and 13.6℃ above the control respectively. Results of this study support the idea that bacterial ice nucleators may be used for the control of freeze- susceptible insect pests in the winter.

Key words: bacterial ice nucleators, supercooling point