| 柑桔蜗牛的初步研究 |
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| 引用本文： | 沈允昌,王继龙,宋国贤,范洪耀.柑桔蜗牛的初步研究[J].上海交通大学学报(农业科学版),1992(1). |
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| 作者姓名： | 沈允昌 王继龙 宋国贤 范洪耀 |
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| 作者单位： | 上海农学院园林环境科学系 上海201101(沈允昌)，上海农学院园林环境科学系 上海201101上海嘉定县(王继龙)，上海市崇明县林业站 上海202150(宋国贤，范洪耀) |
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| 摘 要： | 同型巴蜗牛在上海地区一年发生1代,以成贝或幼贝越冬。越冬后的成贝在4月上旬开始交配产卵,每头成贝产卵10～56粒,平均约22粒.卵期平均约18天,卵的孵化率为67.80%～69.50%.秋季发生量大于春季.在一平方米范围的桔园内越冬死亡率可达38.43%～90.23%,幼贝的越冬死亡率明显高于成贝.
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| 关 键 词： | 柑桔 同型巴蜗牛 |
A PRELMINARY STUDY ON THE CITRUS SUAILS |
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| Shen Yunchang Wang Jilong.A PRELMINARY STUDY ON THE CITRUS SUAILS[J].Journal of Shanghai Jiaotong University (Agricultural Science),1992(1). |
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| Authors: | Shen Yunchang Wang Jilong |
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| Abstract: | The snail Bradybaena similaris(Ferussac)has one generation a year in Shanghai and overwinters as adult or juvenile.The overwintering adults start to move about in the middle of March next year.They begin to mate and to oviposit in the early April.Each adult deposits 21 or 23 eggs in average.The duration of eggs averages 16.1-16.9 days and the hatching rate of eggs 64.67%-67.02%.The snail numbers for damageing citrus is great in Autumn than that in Spring.A ten year old citrus tree may drop over one hundred oranges because of their damage.The juveniles have a high mortality,over 90%,in overwintering. |
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| Keywords: | Citrus Bradybaena similaris |
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