江西省福寿螺分布现状及其在稻田的消长动态

通过野外实地调查以及田间抽样系统调查的方法,对福寿螺在江西省范围内的发生分布及其在稻田的消长规律进行了研究。调查发现,2015年福寿螺已分布在江西省的34个县市区,发生总面积为55 586 hm~2;田间抽样系统调查结果表明,江西省早稻田中福寿螺在6月中旬出现成螺高峰期,在7月上旬出现产卵高峰期,1代幼螺高峰期出现在7月上中旬;在中稻田中,福寿螺成螺和幼螺高峰均出现在8月中下旬,产卵高峰出现在8月下旬;双季晚稻田福寿螺成螺和幼螺在10月上中旬达高峰,产卵高峰期出现在10月中下旬。长期浅水灌溉处理稻田的福寿螺消长规律与干湿交替处理的相似,其成螺、幼螺和卵块密度与干湿交替处理稻田的无明显差异,表明干湿交替处理稻田对福寿螺种群增长无明显抑制作用。

The Pomacea Canaliculata Distribution Status in Jiangxi Province and Its Dynamics of Growth and Decline in Paddy Field

Through field survey and field sampling systemic investigation in paddy fields, the Pomacea Canaliculata occurrence distribution and its growth and decline in paddy ifeld of Jiangxi were studied. The survey found that in 2015 Pomacea Canaliculata has been distributed in 34 counties in Jiangxi Province, the total area of 55586 hm2; the result of ifeld sampling systemic investigation showed that the population peak of adult Pomacea Canaliculata in early rice ifeld was observed at mid-June, the peak of spawning in early July, the peak of the 1st generation of young Pomacea Canaliculata appeared in the early and middle of July; in the rice paddy ifeld, the peak of both the adult and the young snails appeared in mid and late August, spawning peak appeared in late August; in double cropping late rice ifeld, the adult and young snails reached a peak in early and mid of October, spawning peak occurred in mid and late October. The Pomacea Canaliculata growth and decline pattern in rice paddy treated with long-term shallow water irrigation was similar to that of dry and wet treatment, the adult snails, young snails and egg mass density had no obvious difference in both rice paddy ifeld, there was no signiifcant inhibition effect on the growth of Pomacea Canaliculata population in paddy ifelds treated with alternate wet and dry treatments.