
Risk analysis ofZeuzera coffeae Nietner in Jiangsu Province
JU Yunwei, ZHU Chenxi, YAN Xiaoru, ZHANG Yu, WU Yali, ZHAO Yuling, WANG Kechun, LI Yongrong
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 43 ›› Issue (6) : 207-210.
Risk analysis ofZeuzera coffeae Nietner in Jiangsu Province
【Objective】The risk analysis of Carya illinoinensis Koch harmed by Zeuzera coffeae Nietner was conducted to determine the degree of hazard, which provided a reference for the prevention and control of Z. coffeae in the production of C. illinoinensis.【Method】From 2016 to 2017, four sample lands (50 m × 50 m) of C. illinoinensis Koch planting bases in Luhe of Nanjing and Jurong of Zhenjiang of Jiangsu Province, were investigated for the damage caused by Z. coffeae Nietner to the C. illinoinensis Koch forest. Seven sample plots were selected from each sample land by the diagonal method, and ten sample plots from each sample were selected by interlaced sampling. The calculation method of the damaged rate ofC. illinoinensis Koch is the total number of damaged C. illinoinensis Koch divided by the total number of plants investigated. According to the evaluation criteria of forestry pest risk analysis, the risk degree of Z. coffeae was quantitatively analyzed for the first time, and the risk analysis was carried out by a comprehensive analysis method.【Result】The damaged rate of C. illinoinensis Koch was 41.43% for 3-year-old victims; the rate of 4-year-old victims was 32.86%; the rate of 5-year-old victims was 22.14%; the rate of 6-year-old victims was 17.86%. Based on the rules of pest risk analysis, we categorized the risk level of Z. coffeae Nietner using five indexes: the distribution, potential degree of damage, economical value of infected host plants, possibility of transmission and spreading, and difficulty of risk management in Jiangsu. The values of the five indexes were calculated as 2.00, 3.00, 1.80, 3.00 and 1.67, respectively. The overall risk value of Z. coffeae Nietner was 2.22. 【Conclusion】Through the analysis of the spread, harm, and risk of Z. coffeae Nietner, it is considered to be a highly dangerous pest for C. illinoinensis Koch. During production, the monitoring of Z. coffeae Nietner should be strengthened, and timely detection and prevention should be carried out to control the density of this insect population; this will reduce the negative impact on the economic and ecological benefits of C. illinoinensis.
Carya illinoinensis Koch / Zeuzera coffeae Nietner / risk analysis / Jiangsu
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