The supercooling ability and biochemical substances in diapausing and nondiapausing larvae of Grapholitha molesta (Busck) (Lepidoptera: Tortricidae)
Author of the article:GUO TingTing1LING Fei3ZHANG ShunYi1YU Yi2LI LiLi2**XU YongYu1
Author's Workplace:1.College of Plant Protection, Shandong Agricultural University, Tai’an271018, China;2. Shandong Academy of Agricultural Sciences, Jinan250100, China; 3. Department of Constructional Administration, Rizhao International Ocean City Investment Co. Ltd, Rizhao276800, China
Key Words:Grapholitha molesta, diapauses, freewater, totalfat, glycerin, trehalose, glycogen, protein
Abstract: The oriental fruit moth, Grapholitha molesta (Busck), is an important pest of peach and other fruit crops in north China. Previous research found that this moth did the most serious harm to peach crops in Feicheng, Tai’an. In this paper, the supercooling ability and biochemical substances in diapausing and nondiapausing larvae of G. molesta were determined. The results show that, at a temperature of 26℃, the supercooling point (SCP) and freezing point (FP) of diapausing larvae were lower than those of nondiapausing larvae, but that this difference was not significant. The freewater, glycogen and protein content of diapausing larvae were significantly lower than in nondiapausing larvae, however totalfat, glycerin and trehalose in diapausing larvae were significantly higher than in nondiapausing larvae. These results indicate that diapausing larvae may adjust their biochemical processes to enhance resistance to colder temperatures.