Fry-O'Brien L L, Mulla M S
Department of Entomology, University of California, Riverside 92521, USA.
J Am Mosq Control Assoc. 1996 Mar;12(1):33-8.
Laboratory bioassays using Culex quinquefasciatus larvae evaluated the effect of tadpole shrimp on the persistence of Bacillus thuringiensis var. israelensis (B.t.i.) in water collected from the surface of field microcosms. Time elapsed since B.t.i. treatment, as well as presence or absence of soil and tadpole shrimp, affected B.t.i. persistence at the water surface in 15- and 30-cm total depths. The presence of tadpole shrimp slowed the natural decline in B.t.i. effectiveness over time, but this effect was depressed when soil was present. Tadpole shrimp foraged throughout the water column and stirred up the substrate, keeping more particles in suspension at the surface than in microcosms with no shrimp, in microcosms with water depths of 15 and 30 cm.
利用致倦库蚊幼虫进行的实验室生物测定评估了鲎虫对苏云金芽孢杆菌以色列变种（B.t.i.）在田间微型生态系统表面采集的水中持久性的影响。自B.t.i.处理后经过的时间，以及土壤和鲎虫的有无，影响了总深度为15厘米和30厘米的水体表面B.t.i.的持久性。鲎虫的存在减缓了B.t.i.有效性随时间的自然下降，但当有土壤存在时，这种影响会减弱。在水深为15厘米和30厘米的微型生态系统中，鲎虫在整个水柱中觅食并搅动基质，使得水体表面悬浮的颗粒比没有鲎虫的微型生态系统更多。
