红树林广州小斑螟发生与气象因子的关系研究

Study on the Relationship between Occurrence of Oligochroa cantonella Caradja and Meteorological Factors in Mangrove

关键词:  红树林  广州小斑螟  气候因子  相关性  温湿系数  虫害预警

Key words:  mangrove  Oligochroa cantonella Caradja  meteorological factors  correlation  temperature humidity coefficient  warning of pest disaster

摘要:

气候是红树林虫害的重要影响因素之一。为探明气象要素与红树林虫害发生程度的关系，本文以广西北海红树林最常见的虫害——广州小斑螟（Oligochroa cantonella Caradja）为切入点，基于2004-2015年灾情面积数据及气候资料，采用Pearson相关分析法，分别于月尺度和旬尺度上筛选与广州小斑螟发生程度显著相关的关键气象因子及影响时段。结果表明研究区域内广州小斑螟的发生显著受2月上旬环境条件的影响，并与风速、降水量及温湿系数呈正相关，与日平均气温呈负相关。研究结果将为红树林广州小斑螟虫害防治预警提供技术支撑。

Abstract:

Climate is one of the important factors influencing mangrove pests.In order to explore the relationship between meteorological factors and the occurrence degree of mangrove pests, this article takes Oligochroa cantonella Caradja, the most common pest in mangrove forests in Guangxi Beihai, as the starting point.Based on the disaster area data and climate data from 2004 to 2015, Pearson correlation analysis was used to screen the key meteorological factors and the influence period that were significantly related to the occurrence degree of Oligochroa cantonella Caradja on the monthly and ten-day scales.The results showed that the occurrence area of O.cantonella Caradja in study area was significantly influenced by environmental conditions in early February, and was positively correlated with wind speed, precipitation and temperature humidity coefficient, and negatively correlated with daily average temperature.The results of this study will provide scientific and technological support for the early warning and pest control of O.cantonella Caradja in mangrove.