【摘要】 一、大叶黄杨尺蠖(Abraxas miranda Butler)是重要的园林害虫之一,为害卫矛科的两种植物,即:大叶黄杨与爬行卫矛。在中国分布于江苏、浙江、贵州及东北等地。 二、大叶黄杨尺蠖在上海一年发生三代,但在室内饲育可完成四代,以蛹在土中越冬。第一代成虫自4月上旬开始羽化,幼虫自4月下旬开始为害,至5月下旬进入蛹期。第二代成虫自6月上旬开始羽化,幼虫自6月中旬开始为害、直至8月下旬进入蛹期。第三代成虫自8月中旬开始羽化、幼虫自9月上旬开始至11月中旬进入蛹期。 三、根据室内饲养,成虫的寿命第一代雄虫平均7.8天,雌虫平均9.6天;第二代雄虫平均11天,雌虫平均15.4天;第三代雄虫平均9天,雌虫平均10天;第四代雄虫平均12天,雌虫平均14.5天。卵期第一代为14.5天,第二代8.6天,第三代9天,第四代12天。幼虫期第一代平均34.9天,第二代平均23.4天,第三代平均25天,第四代平均58天。蛹期第一代平均11.4天,第二代平均45.8天,第三代平均15.9天,第四代为越冬蛹。 四、成虫飞行力很弱,白天栖息在大叶黄杨树下或附近草丛中,晚上活动,趋光性不强。成虫羽化多在下午3—5时,羽化后即可交尾,一般交尾时间为6—7小时,最长可达11小时,交尾后7小时即行产卵,每一雌蛾可产卵360余粒。 五、幼虫共五龄,羽化后3、4小时就开始取食,受?更多还原

【Abstract】 (1) Euonymus geometer, Abraxas miranda (Butler), is one of the principal garden pests inShanghai, infesting, in particular, Euonymus japonicus Thumb and E. Fortunei Hand-Mazz.,Celastraceae. In China, its distribution includes the provinces of Kiangsu, Chekiang and Kwei-chow as well as some northeastern provinces. (2) Investigations in Shanghai reveal that three generation of euonymus geometer occur inthe course of a year, with the pupa surviving the winter underground. Adults of the first genera-tion start emerging in the first half of April and the larvae of third generation go undergroundto enter into pupa stage in the middle of November. During this period the larvae infest theleaves of Euonymus japonicus Thumb and E. Fortunei Hand-Mazz. (3) This report deals with the life cycle and habits of this pest. It also includes data rela-tive to the horizontal and vertical distribution densities of its winter pupa. The horizontal dis-tribution density is highest in places just under the plant-stems, reaching 37.8-53.3%, while inplaces about 1 ft beyond the stems, no pupa is to be found. Its vertical distribution density ishighest in places 2 mm from the ground surface, ranging from 37.5% to 45.1%, while below5 mm no pupa has been found. (4) Chemical control experiments have been carried out in the laboratories. The results ofthese experiments show: (a) 10% DDT powder is fully capable of exterminating larvae of all stages; (b) 5% DDT powder registers 95% mortality when treated against olders larvae; (c) 1/1000 dipterex solution registers 97.5% mortality when treated against the larvae of laterstages; (d) 1/2500 dipterex solution registers 100% mortality when treated against larvae of 2-3stages; 78.4% against larvae of later stages; (e) 1/150, 1/200 and 1/300 solution of lead arsenate effects only low mortality. On the basis of the data on the horizontal and versical distribution densities of the over-wintering pupa as reported here, it is recommended that steps should be taken to unearth andesterminate the winter pupa in combination with the anti-four-pests campaign in the winter. Inview of the poor flying ability of the adult, it is also recommended that survey should be madeto ascertain the growth data of the adults of the first generation and exterminate them whenthey start emerging. The survey should be made on basis of past records and the weather condi-tion of the current year.更多还原