论文部分内容阅读
花绒寄甲Dastarcus helophoroides(Fairmaire)是松褐天牛Monochamus alternatus的有效寄生性天敌,为了解花绒寄甲在江西赣南苏区对松褐天牛种群数量的控制作用,开展了花绒寄甲在赣南松树林内自然分布、寄生率及松褐天牛种群情况的调查。结果表明,花绒寄甲在赣南松树林内分布广泛,对松褐天牛的自然寄生率为2.56%-22.41%,平均寄生率为11.74%,其中马尾松纯林的寄生率最高(14.81%),其次马尾松混交林(10.95%),湿地松纯林寄生率最低(2.56%),前两项差异不显著,后者与前两者均差异显著(P<0.05);花绒寄甲的种群数量动态与其寄主松褐天牛的种群数量动态是一致的,呈正相关关系(R2=0.8399),花绒寄甲在野外主要以1-2头幼虫寄生1头松褐天牛幼虫的寄生方式营寄生生活(占79.10%)。因此在赣南松林中,花绒寄甲种群数量较低,必须大量补充人工繁育的寄甲,才能达到控制松褐天牛防治松材线虫病的目的。
Dastarcus helophoroides (Fairmaire) is a potent parasitic natural enemies of Monochamus alternatus. In order to understand the control of the population of Monochamus alternatus in southern Jiangxi Province, Investigation on the natural distribution, parasitism rate and the population of Monochamus alternatus populations in southern pine forests. The results showed that the natural parasitic rate of Monochamus alternatus was 2.56% -22.41% and the average parasitism rate was 11.74%. The pure parasitism rate of Pinus massoniana was the highest (14.81% ), Followed by Pinus massoniana mixed forest (10.95%) and the lowest (2.56%) in the pure P. elliottii forest, the difference between the former two was insignificant (P <0.05) (R2 = 0.8399), and the parasitism of 1-2 cashmere larvae parasitized in the field was observed in the population dynamics of Monochamus alternatus Way camp parasitic life (79.10%). Therefore, in the southern Jiangxi pine forest, the cashmere foraminifera population is low, we must make a lot of artificial breeding of the fodder, in order to achieve the control of Monochamus alternates against pine wilt disease.