Fox L R, Eisenbach J
Department of Biology, University of California, 95064, Santa Cruz, CA, USA.
Oecologia. 1992 Apr;89(4):574-579. doi: 10.1007/BF00317166.
The pressure to escape natural enemies may shape how herbivorous insects use their plant resources. On wild crucifers, ovipositional preferences of the diamondback moth (Plutella xylostella; DBM) were similar to searching preferences of its main parasitoid, an ichneumonid wasp (Diadegma insulare). But on cultivated crucifers, these species had opposite preferences. In addition, DBM ovipositional preferences did not correlate with growth or reproduction on several foodplants. We interpret these patterns as evidence of evolution for use of enemy-free space in agricultural systems.
逃避天敌的压力可能会影响植食性昆虫利用植物资源的方式。在野生十字花科植物上，小菜蛾（Plutella xylostella；DBM）的产卵偏好与其主要寄生蜂——一种姬蜂（Diadegma insulare）的搜索偏好相似。但在栽培十字花科植物上，这些物种的偏好相反。此外，小菜蛾的产卵偏好在几种食物植物上与生长或繁殖并无关联。我们将这些模式解释为农业系统中利用无天敌空间的进化证据。
