Brown V K, Leijn M, Stinson C S A
Imperial College at Silwood Park, SL5 7PY, Ascot, Berks, UK.
Oecologia. 1987 Jun;72(3):377-381. doi: 10.1007/BF00377567.
The effects of insect herbivores on natural communities of plants may be demonstrated by manipulative experimetns. Such experiments, which reduce the natural levels of herbivory by application of insecticide, incorporate the assumption that the insecticide has no direct effect on the vegetation. A test of this assumption should therefore be an integral part of any study of herbivory employing chemical exclusion. Here a single compound (Malathion-60), which is commonly used in such studies, is tested both in the field and on selected plant species under controlled conditions. It was found to have no effect on a range of early successional plant species. The limitations of the tests are discussed.
食草昆虫对植物自然群落的影响可以通过操纵实验来证明。这类实验通过施用杀虫剂降低了食草动物的自然水平，其中包含了杀虫剂对植被没有直接影响的假设。因此，对这一假设的检验应该是任何采用化学排除法进行的食草动物研究的一个组成部分。在这里，一种在这类研究中常用的单一化合物（马拉硫磷-60）在田间和受控条件下对选定的植物物种都进行了测试。结果发现它对一系列早期演替植物物种没有影响。文中讨论了这些测试的局限性。
