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一、为害特点枣食芽象甲,属鞘翅目象鼻虫科。又名枣飞象、小灰象甲、土猴。以成虫危害枣树嫩芽幼叶,大量发生时,能吃光全树嫩芽造成树体死亡。该虫属杂食性害虫,主要危害枣树、桃树、苹果、梨、紫穗槐、杨树等的幼芽和嫩叶。每年发生一代,以幼虫在土壤中越冬,四月下旬枣芽萌发时。成虫出土食害嫩芽,寿命约70天。成虫有假死性,清晨和晚间不活动,受惊后落地假死。5月上旬交尾产卵,卵期为半个月,幼虫孵化后落地入土。在土中生长发育。枣食芽象甲成虫为害期为4月底至5月底,6月也有为害,但很少成灾。二、试验材料与方法试验地选在灵寿县城北关苗圃地和南堤下村苗圃嫁接地。实验树种为枣树平茬留圃苗和当年新嫁接苗,试验分药剂喷施、药液浇灌和毒土撒施三种,时间为2004年5月1-5日,对照区与实验地相隔100米。喷药试验:试验在枣树当年平茬苗和嫁接苗圃于萌发率50%时进行。设7个处理:(1)50%辛硫磷乳油800倍液;(2)50%辛硫磷乳油1000倍液;(3)50%对硫磷乳液1000倍液;
First, the damage characteristics jujube buds like a, Coleoptera weevils Division. Also known as flying jujube, small gray as a monkey, monkeys. To adults endanger jujube shoots young leaves, a large number of occurrence, can eat light tree shoots cause tree death. The insects are omnivorous pests, mainly jujube, peach, apple, pear, Amorpha fruticosa, poplar and other young shoots and young leaves. A generation occurs each year, larvae wintering in the soil, jujube bud germination in late April. Adult unearthed food buds, life expectancy of about 70 days. Adults have lethality, in the morning and evening activities, frightened and suspended animation. Spawning eggs in early May, oviposition half a month, the larvae hatch after landing. In the soil growth and development. Jujube buds as adults a harm to the end of April to the end of May, June also harmful, but rarely affected. Second, the test materials and methods Experimental selection in the Lingshou County Beiguan Guan nursery and the South embankment village nursery grafting. The experimental tree jujube stubble leave nursery seedlings and the new grafting year, the test points spraying agents, liquid irrigation and poison soil three kinds of time for the May 1, 2004 May 5, the control area and experimentally separated 100 metres. Spraying test: The experiment in the jujube tree stubble seedlings and grafting nursery at the germination rate of 50%. Set 7 treatments: (1) 500 times phoxim 800 times; (2) 50% phoxim 1000 times liquid; (3) 50% parathion 1000 times;