不同茶树品种对假眼小绿叶蝉的抗性

【目的】比较竹山一号、恩标、龙井43等9个茶树品种对假眼小绿叶蝉（Empoasca vitis Göthe）的抗性水平，为茶树品种抗虫性机理研究奠定基础。【方法】调查叶蝉在不同品种上的田间数量动态、生命周期、每雌产若量和若虫成活率，并用刺探电位图谱（electrical penetration graph，EPG）技术记录叶蝉的取食行为。【结果】①叶蝉在恩标、竹山一号、斑竹园和蓝天上的田间虫口密度普遍大于德清、建德、长兴紫笋和举岩；②德清、举岩、长兴紫笋、建德和龙井43上叶蝉的生命周期显著长于恩标、斑竹园和竹山一号；③恩标和斑竹园上小绿叶蝉每雌产若量明显多于举岩、长兴紫笋、建德和龙井43；④恩标和竹山一号上若虫成活率最高，分别为55.00%和50.00%；举岩上若虫成活率最低，仅为32.00%；⑤竹山一号和恩标上叶蝉取食时间显著长于德清、举岩、长兴紫笋、建德和龙井43，与蓝天和斑竹园没有显著差异；⑥使用聚类分析评价9个茶树品种抗叶蝉能力，将其分为两大类。第Ⅰ类：举岩、德清、龙井43、建德和长兴紫笋，对假眼小绿叶蝉抗性较强；第Ⅱ类：蓝天、斑竹园、竹山一号和恩标，对假眼小绿叶蝉抗性较弱。不同品种对叶蝉的抗性从强至弱的顺序为：举岩＞德清、龙井43、建德和长兴紫笋＞蓝天、斑竹园和竹山一号＞恩标。【结论】田间虫口密度、生命周期、每雌产若量、若虫成活率和取食时间能够体现假眼小绿叶蝉在茶树品种上的自然选择、适应度和取食偏好，在分类茶树品种抗叶蝉水平上存在明显差异。

Resistance of Different Tea Cultivars to Empoasca vitis Göthe

【Objective】 The objective of this study is to analyze resistant levels of 9 tea cultivars to small green leafhopper(SGL) Empoasca vitis and to establish foundation for mechanism research in the resistance of various tea cultivars.【Method】 The population dynamics in tea garden,life cycle,number of laid nymphae per female and nymph survival rate of SGL on different tea cultivars were investigated.Moreover,the feeding behavior of SGL on tea cultivars were obtained by using electrical penetration graph(EPG) technique.【Result】(1) The population density on Enbiao(EB),Zhushanyihao(ZS),Banzhuyuan(BZY) and Lantian(LT) cultivars were more than Deqing(DQ),Jiande(JD),Changxingzisun(CX) and Juyan(JY).(2) The life cycle duration on DQ,JY,CX,JD and Longjing 43(LJ) were significantly longer than that on EB,BZY and ZS.(3) The number of laid nymphae per female on EB and BZY were significantly more than that on JY,CX,JD and LJ.(4) The difference existed in nymph survival rate on various cultivars.The survival rate of nymphae on EB and ZS were the highest,amounted 55.00% and 50.00% respectively,while the lowest was on JY,amount 32.00%.(5) The total feeding duration on ZS and EB were significantly longer than that on DQ,JY,CX,JD and LJ.(6) The resistant levels of the 9 tea cultivars to SGL were classified into two groups based on the result of cluster analysis according to the life cycle duration,number of laid nymphae per female,nymph survival rate and the feeding duration.The first group,including JY,DQ,LJ,JD and CX,was resistant to the SGL,and the second group was susceptible to the SGL,consisting of LT,BZY,ZS and EB.Generally,the order of resistance level with 9 cultivars from strong to weak were JY > DQ,LJ,JD and CX > LT,BZY and ZS > EB.【Conclusion】 The natural choice,adaptability and feeding preference of SGL on various cultivars are reflected well based on the dynamics of population density,life cycle,number of laid nymphae per female,nymph survival rate and feeding duration,which are significantly different in the classification of various cultivars in resistant levels to the SGL.