旱地优质稻田稻象甲成虫发生动态及空间分布型

Occurrence dynamic and spatial distribution pattern of Echinocnemus squameus Billberg adults in dry land high-quality rice field

【目的】明确旱地优质稻田稻象甲成虫的发生动态、空间分布型和种群抽样技术,为旱地优质稻稻象甲成虫的调查取样、预测预报及综合防控提供科学参考。【方法】以云南省普洱市澜沧县竹塘乡蒿枝坝村、哈果马村和诺国村旱地优质稻种植区为试验地点,于2022和2023年采用连片调查的方法对旱地优质稻田稻象甲成虫发生动态及空间分布型进行调查;采用聚集度指标法、Iwao回归分析法、Taylor幂函数法及种群聚集均数分析不同地区旱地优质稻田稻象甲成虫的空间分布型和聚集原因,并基于空间分布结果,拟合形成理论抽样模型和序贯抽样模型。【结果】2022和2023年各调查点旱地优质稻田稻象甲成虫发生动态均为单峰型,始见于5月中旬,于8月中旬后仅零星发生,7月是其发生高峰期,并于7月中下旬达到最高峰。聚集度指标法、Iwao回归分析法及Taylor幂函数法分析表明2022、2023年3个调查点的旱地优质稻田稻象甲成虫在田间均呈聚集分布,引起聚集的原因是昆虫本身的生活习性及气候、土壤湿度、植株生长状况等环境因素。2023年蒿枝坝村和诺国村旱地优质稻田稻象甲成虫基于空间分布的理论抽样模型分别为N=t^(2)/D^(2)(2.170/m+0.214)、N=t^(2)/D^(2)(2.599/m+0.228),基于稻象甲成虫临界防治指标的序贯抽样模型分别为T_(0)(n)=2n±2.279√n、T_(0)(n)=2n±2.472√n。【结论】云南省普洱市澜沧县竹塘乡旱地优质稻田稻象甲成虫发生动态为单峰型,其在田间均呈聚集分布,引起聚集的原因是昆虫本身的生活习性及气候、土壤湿度、植株生长状况等环境因素。

【Objective】To clarify the occurrence dynamics,spatial distribution patterns and population sampling techniques of Echinocnemus squameus Billberg adults in dry land high-quality rice fields,and to provide scientific reference for investigation,sampling,prediction and comprehensive control of E.squameus in high-quality rice fields in dry land.【Method】In the dry land high-quality rice planting areas of Haozhiba Village,Haguoma Village and Nuoguo village in Zhutang Township,Lancang County,Pu’er City,Yunnan Province,the dynamic and spatial distribution patterns of adult E.squameus were investigated by continuous field survey in 2022 and 2023.The spatial distribution patterns and aggregation reasons of E.squameus were analyzed by using the clustering index method,Iwao regression analysis method,Taylor power function method and population aggregation mean.Based on the spatial distribution results,theoretical sampling model and sequential sampling model were formed.【Result】In 2022 and 2023,the occurrence dynamics of E.squameus adults were unimodal in dry land high-quality rice field of investigation sites,which started in mid-May and occurred sporadically after mid-August.The peak occurred in July and reached its peak in mid-to-late July.The clustering index method,Iwao regression analysis and Taylor power function method analysis showed that in 2022 and 2023,E.squameus adults in the dry land high-quality rice fields of the three investigation sites were clustered in the fields,which was caused by the living habits of the insects and environmental factors such as climate,soil moisture and plant growth.In 2023,the theoretical sampling models based on spatial distribution of adult E.squameus in Haozhiba Village and Nuoguo Village were N=t^(2)/D^(2)(2.170/m+0.214)and N=t^(2)/D^(2)(2.599/m+0.228)respectively,and the sequential sampling models based on critical control indicators of E.squameus adult were T_(0)(n)=2n±2.279√n and T_(0)(n)=2n±2.472√n respectively.【Conclusion】The occurrence dynamic of E.squameus adult in Zhutang Township,Lancang County,Pu’er City,Yunnan Province is single-peak type.E.squameus adults are clustered in the field,which is caused by their living habits,climate,soil moisture and plant growth.