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Spatio-temporal distribution of Ricania shantungensis (Hemiptera: Ricaniidae) in chestnut fields: Implications for site-specific management
Journal of Asia-Pacific Entomology ( IF 1.5 ) Pub Date : 2021-01-19 , DOI: 10.1016/j.aspen.2021.01.006
Sunghoon Baek , Joon-Ho Lee

Chestnut is one of most important forest products in Korea. However, Ricania shantungensis, an invasive species, has been increasingly causing economic damage to chestnut. To increase management efficiency of R. shantungensis in chestnut fields, its spatio-temporal distributions were analyzed using spatial analysis by distance indices (SADIE) and semivariogram. Experiments were conducted by observing selected, marked, and geo-referenced trees in two commercial chestnut fields for each developmental stage (i.e., spring egg, nymph, adult, and fall egg) of R. shantungensis from 2017 to 2019. Spatial distributions of R. shantungensis were statistically (P < 0.05) aggregated except for its nymphal stage. Spatial associations of its distributions also showed the statistically (P < 0.05) positive associations regardless of years or developmental stages except for the spatial relationship between egg and nymphal stages. These results indicated that site-specific management for R. shantungensis would be applicable. In application of site-specific management for R. shantungensis, the distance of spatial dependence for nymphs, 60 m, should be considered to minimize reoccurrence possibility and additional samplings. Incorporating site-specific management into pest control program of R. shantungensis could increase its control efficiency in chestnut fields.



中文翻译:

的时空分布Ricania shantungensis栗子领域:(Ricaniidae半翅目):对特定网站的管理

栗子是韩国最重要的林产品之一。但是,入侵物种瑞香山东Ricania shantungensis)已经越来越多地对板栗造成了经济损害。为提高山东通花栗子在板栗田的管理效率,采用距离指数(SADIE)和半变异函数法对空间分布进行了时空分布分析。实验观察选定的,标进行的,并且在每个发育阶段两个商业栗字段(即,弹簧卵,若虫,成人,和下降的蛋)的地理参考树木R. shantungensis从2017年到2019年的空间分布ř汕头。的统计学差异(P <0.05)聚合,但若虫阶段除外。 除蛋和若虫阶段之间的空间关系外,其分布的空间关联还显示出统计学上的正相关(P <0.05),而与年份或发育阶段无关。这些结果表明,对山东通花草进行特定地点的管理将是适用的。在应用山东立枯病的特定地点管理时,若虫的空间依赖性距离应为60 m,以最大程度地减少再次发生的可能性和额外的采样。在山东栗的害虫防治计划中纳入特定地点的管理措施可以提高其在栗田的防治效果。

更新日期:2021-01-19
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