针叶小爪螨-寄主植物-芬兰钝绥螨相互关系的研究Ⅲ.寄主植物的化学组成与针叶小爪螨生长发育的关系

用海绵水盘法饲养针叶小爪螨Oligonychusununguis (Jacobi) ,观察其在未受害板栗、麻栎、栓皮栎和槲树叶片及受害板栗、麻栎叶片上的生长发育状况 ,并测定了这些植物叶片中某些化学物质的含量。结果发现 ,危害槲树者 ,其发育历期最长 ,雌成螨寿命最短 ,平均单雌产卵量最少 ;危害板栗、麻栎、栓皮栎者生长发育状况无明显差异 ,但危害板栗者幼螨期明显缩短 ;叶片受该螨危害后 ,游离氨基酸的总量、全氮含量减少 ,可溶性总糖、粗脂肪、单宁的含量增加。与板栗、麻栎、栓皮栎相比 ,槲树叶片中游离氨基酸的总量、全氮含量、可溶性总糖的含量最低 ,单宁含量最高

STUDIES ON THE INTERRELATIONSHIP AMONG OLIGONYCHUS UNUNGUIS, HOST PLANTS AND AMBLYSEIUS FINLANDICUS Ⅲ.RELATIONSHIP BETWEEN CHEMICAL COMPONENT OF HOST PLANTS AND DEVELOPMENT OF OLIGONYCHUS UNUNGUIS

The development of Oligonychus ununguis feeding on the leaves of Castanea mollissima BL., Quercus acutissima Carr., Quercus variabilis BL. and Quercus dentata Thunb. was observed through leaf disk rearing method and the content of some chemicals in these leaves were determined. Results showed that, compared with the spruce spider mites feeding on the leaves of Castanea mollissima, Quercus acutissima and Quercus variabilis , the mites feeding on the leaves of Quercus dentata had the longest developmental periods, the shortest life span of adult females and the least ovipositional quantity. There were no significant differences among the development of the mites feeding on the leaves of Castanea mollissima, Quercus acutissima and Quercus variabilis . But the period of larvae feeding on the leaves of Castanea mollissima was short. Of these four plant species, Quercus acutissima, Quercus variabilis, Castanea mollissima and Quercus dentata , the content of free amino acids, total nitrogen, total soluble sugar in the leaves of Quercus dentata was the lowest, tannin content was the highest. In the leaves injured by Oligonychus ununguis , the content of total free amino acids, total nitrogen decreased and the content of soluble sugar, crude fat and tannin increased.