气象因素对芒果蓟马种群数量动态的影响

明确芒果园中蓟马复合种种群动态与气象因子之间的关系。用粘虫板定期定点监测芒果园中蓟马的种群消长情况;通过相关分析、主成分分析和灰色关联分析,分析其与气象因素的关系。芒果花期蓟马种群数量为全年发生高峰。相关分析结果表明,监测日蓟马种群数量与日平均气温(℃)、日最大风速(m/s)显著正相关,与日最低气温(℃)显著负相关。芒果花期蓟马种群数量与2月降水量(mm)、3月平均风速(m/s)、1-2月平均气温(℃)、2月月均最高、最低气温(℃)、2-3月平均相对湿度(%)及1-3月平均最小相对湿度(%)显著相关。主成分分析表明,月平均温度(℃)和月最低气温(℃)是影响蓟马种群动态的主要因素,对蓟马种群动态的影响达56.0%。灰色关联分析表明,月均最低气温(℃)对芒果蓟马种群数量影响最大。月最低气温(℃)和月平均温度(℃)是影响芒果园中蓟马复合种种群数量动态的主要气象因素。芒果蓟马复合种种群数量受食物、种群扩散、天敌、自身繁殖和气候因素的共同影响。

Effect of climatic factors on the quantitative dynamics of mango thrips

The relationships between the quantitative dynamics of complex thrips population and climatic factors were clarified in mango orchard.The population dynamics of thrips were regularly monitored using sticky traps, then their relationship with climatic factors were analyzed by correlation analysis, principal components analysis and grey relational analysis.The results showed that the quantitative peak of thrips occurred in blooming stage.The correlation analysis indicated that the daily population dynamics were significantly positively correlated to daily maximum wind velocity and negatively correlated to mean daily temperature, daily minimum temperature.The population dynamics of thrips were significantly positively correlated to rain fall amounts in February, mean wind velocity in March, mean temperature from January to February, maximum and minimum temperature in February, monthly minimum relative humidity from February to March, minimum relative humidity from January to March in blooming stage.The principal components analysis showed that mean monthly temperature and mean monthly minimum temperature were the main factors which affected 56% population dynamics of thrips.The grey relational analysis indicated that the key factor was mean monthly minimum temperature.The quantitative dynamics of complex thrips mainly influenced by mean monthly temperature and mean monthly minimum temperature.In summary, the population dynamics of thrips were also affected by food, dispersion, natural enemies, reproduce and climatic factors.