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板栗剪枝象[Cyllorhynchites cumulatus(Voss)]主要以成虫剪断幼嫩果枝产卵而影响板栗的产量,是历年来威胁板栗生产的重要果实害虫之一。为具体了解板栗剪枝象在罗田县栗园的发生为害情况,于2016年6—7月在全县选取10个镇22个不同类型的栗园进行了调查。结果表明,板栗剪枝象为害始于6月初栗苞形成期,盛发于6月中旬栗仁形成期,止于7月中旬栗仁膨胀初期。板栗剪枝象的发生与栗园的种植和管理方式存在密切的关系。自然生草、疏于管理的栗园发生较重;种植林下作物、加强管理能有效抑制害虫的发生。板栗挂果枝少、繁殖资源紧缺是导致板栗剪枝象快速扩散的主要因素。
Chestnut cuttings [Cyllorhynchites cumulatus (Voss)] is one of the important fruit pests that threaten the production of Chinese chestnuts over the years, mainly affecting the production of chestnuts by cutting the young fruit branches with adults and laying eggs. In order to learn more about the occurrence of chestnut pruning elephants in the chestnut fields of Luotian County, 22 different types of chestnut fields were selected from 10 towns in the county in June-July 2016 for investigation. The results showed that the pruning of chestnut chestnut began in the early bud of chestnut in early June, and flourished in the chestnut kernel in mid-June, ending in the early expansion of chestnut in mid July. The occurrence of chestnut pruning is closely related to the cultivation and management of chestnut fields. Natural grass, negligence in the management of the chestnut garden heavier; planting understory crops, strengthen management can effectively inhibit the occurrence of pests. Chestnut hanging fruiting branches, lack of reproductive resources is the main factor leading to rapid proliferation of chestnut pruning.