福建茶树害螨发生动态及其与茶树品种理化特性的相关性分析

The fluctuations of the index of pest mite situation and their correlations with the physical and chemical characteristics on 5 tea varieties in Fujian

用5点采叶取样法调查了茶树害螨发生特点。结果表明:各茶树品种的害螨盛发高峰期一般都出现在8月底到9月初;对2005年5品种茶树上害螨螨情指数高峰期进行方差分析,结果表明均达到极显著差异(F=4.141,P=0.0054)。对不同茶树品种的叶片理化指标与螨情指数进行相关分析,结果表明:叶片厚度与相应品种的螨情指数之间呈一定的负相关关系(F=0.3903,r=-0.4040);不同茶树品种的叶片下表皮及其角质层厚度和相应品种的螨情指数之间呈一定的正相关关系(F=2.40,r=0.7389);不同茶树品种叶片的咖啡因和GC含量与害螨螨情指数呈负相关,相关关系接近显著水平(F=3.44,r=-0.7309和F=5.96,r=-0.8156)。

The fluctuations of the index of pest mite situation （IPMS） on 5 tea varieties （ Huangdan, Maoxie, Tieguanyin, Fuyun No. 6 and Rougui） were investigated by the quincunx - sampling method. The results showed that the peaks of the IPMS on different tea varieties all appeared during late August and early September. Analysis showed that the IPMS among the 5 tea varieties were significantly correlated with each other（F =4. 141, P = 0. 0054）. Correlations analysis between the IPMS and physical and chemical characteristics of the 5 tea varieties indicated that the thickness of tea leaf was negative correlated with the IPMS（ F =0. 3903 ,r = - 0. 4040） ; spikey layers of lower and upper epidermis was positively correlated with the IPMS（ F = 2. 40, r = 0. 7389） ; Caffeine and GC had a slightly negative correlation with the IPMS （ F = 3.44, r = - 0. 7309 ＆ F = 5. 96, r = - 0. 8156）.