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朝鲜球坚蚧的发生及防治姜耀民，姜国柱，崔学修，刘文福（瓦房店市得利寺农场１１６３０１）近几年来，得利寺农场及周围乡镇的桃树、杏树、李树、樱桃树等，朝鲜球坚蚧为害非常严重，致使树体衰弱，产量下降，经济效益受到很大影响。据调查，有不少人对此虫的生活习性，发生规律不能掌握，特别对防治有关的若虫出壳爬行期摸的不准确，结果喷药后仍无效果，反而逐渐加重为害，因而失去防治信心。也有人误把固定在枝干背阴面的黑缘红瓢虫的蛹认为是介壳虫而遭杀害（黑缘红瓢虫是捕食朝鲜球坚蚧的重要天敌，蛹体上有许多枝刺，固定在枝干背阴面）。为此，从１９９１年－１９９３年，对此虫的生活习性，发生规律我们进行了观察研究，并做了药剂试验。结果如下：１为害及防治情况调查１９９３年４－６月间，在得利寺农场北瓦房店、小龙口、赵屯及得利寺一、三队，对桃、杏、李、樱桃树进行了调查，同时对周围５个乡镇也做了为害及防治情况的调查，共计调查了１２个小队，走访果农７５户。结果表明，调查的桃树４０株中，受害株率为６７．５％；杏树３５株，受害株率为１００％；李树１７０株，受害株率为１００％；樱桃树３０株，受害株率为４０％。发芽前采取药剂防治的有６户，占总户８％，夏季防治的有
Occurrence and Prevention of Chickweed in North Korea Jiang Yaomin, Jiang Guozhu, Cui Xuexiu, Liu Wenfu (Suntory Farm, Wafangdian 116301) In recent years, the peach tree, the apricot tree, the plum tree and the cherry tree Etc., North Korea ball colony is very serious damage, resulting in a weak tree, production decline, the economic benefits have been greatly affected. According to the survey, there are many people living habits of this pest, the law can not be mastered, especially for the prevention and treatment of nymphs hiding crawling inaccurate, the results still no effect after spraying, but gradually aggravate the damage, and thus lose control confidence. Some people mistakenly think that the pupae of the black-rimmed red ladybug fixed on the dorsal surface of the branch are killed as scale insects (Black-rimmed red ladybugs are important natural enemies for the predation of D. dabryanus. There are many sticks on the pupae and are fixed In the branches of the shady). To this end, from 1991 to 1993, the habits of this pest, the occurrence of the law we conducted an observational study, and made a pharmaceutical test. The results are as follows: 1 Investigation of Harmfulness and Prevention During April-June of 1993, first- and third-team teams at North Wafangdian, Xiaolongkou, Conducted a survey, at the same time on the surrounding five towns also done a survey of the damage and prevention and control of a total of 12 teams surveyed, visited 75 farmers. The results showed that among the 40 peach trees investigated, 67.5% of the pests were affected, 35 of which were almond trees, and 100 of the diseased plants were affected; 170 of the Li trees were damaged and the rate of the damaged plants was 100%; and 30 of the cherry trees were harmed Strain rate was 40%. Pre-emergence agents to take preventive measures 6, accounting for 8% of the total households, there are summer prevention and control