Projected potential range and risk analysis of the sweet potato weevil, Cylas formicarius (Fabricius), in Jiangsu province
Author of the article:GAO Peng;HU Jie;GONG Wei-Rong;DU Yu-Zhou
Author's Workplace:School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University ; Jiangsu Plant Protection and Plant Quarantine Station
Key Words:Cylas formicarius (Fabricius); pest risk analysis; risk management; Jiangsu province
Abstract:
[Objectives] To
investigate the risk of introducing and spreading the alien invasive sweet potato
weevil, Cylas formicarius (Fabricius)
in Jiangsu province. [Methods] The principle of agroclimatic
analogy was used to analyze the suitability of areas for C. formicarius in Jiangsu. Based on the pest risk analysis (PRA)
procedure according to international standards for pest measurements (ISPM) and
the relevant PRA model, this study based the quantitative and qualitative
analysis of the risk of C. formicarius establishing in Jiangsu on five factors; the distribution of C. formicarius in China and Jiangsu,
the potential damage that could be caused by this pest, the economic importance
of damaged host plants, the risk of establishment and spread, and the
difficulty of management. [Results] The C. formicarius synthetic risk index is 2.26. In addition, C. formicarius occurs seasonally south
of 34.5°N in Jiangsu but only sporadically north of this latitude. It should be
noted that there is currently no part of Jiangsu that is absolutely unsuitable
for C. formicarius or where the
species occurs year-round. [Conclusion] C. formicarius meets the requirements to be classified as
quarantinable pest in China, and Jiangsu is a potential area where this species
could establish. Based on this, two risk management strategies are proposed to
reduce the risk of C. formicarius establishing in Jiangsu to an acceptable level.