【摘要】 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。更多还原

【Abstract】 Cyllorhynchites cumulatus (Voss), affecting chestnut yield by the adult cutting off the spawning fruit branch, is one of the important fruit insect pests of Castanea mollissima Blume in Luotian county over the years. In order to understand occurring and damage characteristics of C. cumulatus, the investigation was conducted from June to July in 2016 in 22 different chestnut orchards selected from ten towns of the county. Damage of the species began at early June with chestnut involucres formation, broke out in mid June with chestnut kernels formation, ended at mid July with chestnut kernels early swelling. The occurrence of C. cumulatus populations was closely related to cultivating and management modes of chestnut orchards. Chestnut fruit branches were heavily cut off in the orchards with natural grass, negligent management, however, the damage was effectively prevented by the planting crops and strengthening management. The less chestnut fruit branches could not satisfied to the breed resource, which was the main factor resulting the species rapidly spreading at breaking out stage of the population.更多还原