药环法防治草履蚧草履蚧为害核桃、柿、梨等多种果树，一年发生一代，以卵在树冠下上块、石缝等处越冬，１月上中旬孵化为若虫，２月即开始上树爬到小枝、嫩芽等处吸食汁液，使大量花芽受损不能开花结果。为探索简便易行、经济有效的防治措施，笔者于１９９１年在昌平县下... Pharmacopoeia prevention and treatment of grass alba Cordyceps parasites Kuwana walnut, persimmon, pear and other fruit trees, a generation a year, the eggs under the crown block, stone crevices and other winter, mid-January hatched nymphs, in February that is, Climb the tree on twigs, buds and other places to drink juice, so that a large number of flower buds damaged can not blossom. In order to explore simple, cost-effective prevention and treatment measures, the author in 1991 under the Changping County ...