摘要
为明确稻水象甲在陕西省水稻主产区的种群发生规律。在汉中市稻水象甲发生区分别选择平川和山区两种不同环境，对稻水象甲不同虫态发育时间进程及越冬场所虫量进行系统调查研究。结果表明：稻水象甲在陕西省水稻主产区1a发生1代，以成虫越冬。越冬成虫于3月上旬中后期（温度为10～15℃）开始活动。在5月下旬至6月上旬为幼虫活动盛期，也是大田防治关键时期；不同地理环境下，发现稻水象甲在山区虫态发育较平川晚15～20d左右，初秋时期稻水象甲成虫由田埂向沟渠逐渐转移进入越冬，越冬成虫主要分布在沟渠边0～5cm的土壤中。查明稻水象甲在陕为害寄主作物涉及种类共9科，31种。稻水象甲在陕种群发生规律的明确，为陕西省稻水象甲普查监测与防控工作提供科学依据。
In order to investigate the rice water weevil （Lissorhoptrus oryzophilus Kusche） population occurrence in major rice producing areas of Shaanxi Province, two differential ecological environments, plain and mountain in Hanzhong city were chosen to study the rice water weevils developmental time course of different stages as well as their amount in overwintering place. The results showed that the rice water weevil occurred one generation per year in Shaanxi main rice growing regions,and overwin- tered as adults. Overwintered adults started activity in early March （temperature varies from 10--15 ℃ ）. Larval activity reached their peak in late May and early June,and these two months were also the key period for the pest control. For different topographies, rice water weevil in the mountain area developed 15 to 20 days later than that in the plain. In early autumn,the adults gradually moved from ridge to ditch for overwintering,and overwintered adults were mainly distributed in 0 to 5 cm of soil layer around the ditch. 9 families and 31 species of crops were found to be harmed by rice water weevil in Shaanxi. The population occurrence regularity of rice water weevil provides a scientific basis for the pest monitoring and pest controlling in Shaanxi.
出处
《西北农业学报》
CAS
CSCD
北大核心
2014年第1期108-112,共5页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
稻水象甲
种群
生活史
发生规律
Rice water weevil （Lissorhortrus oryzophilus Kusche）
Population
Life history
Occur-rence regularity
