Jones D
Exp Parasitol. 1986 Feb;61(1):10-7. doi: 10.1016/0014-4894(86)90129-3.
When eggs of the caterpillar Trichoplusia ni are stung by Chelonus sp. (near C. curvimaculatus) (Braconidae), the developing host larvae precociously spin a cocoon but then remain developmentally stationary in the prepupal stage. The latter event happens even in hosts which were stung and precociously spin cocoons but which, upon dissection, contain no obvious parasite. Injection of radiolabeled ecdysone into either pseudoparasitized or allatectomized larvae demonstrates suppressed rates of conversion of ecdysone to 20-hydroxyecdysone when compared with controls. The data indicate that the occurrence of developmentally stationary pseudoparasitized prepupae is due to less production of ecdysteroid and less conversion of ecdysone to 20-hydroxyecdysone, both probably as a result of suppressed juvenile hormone titer.
当粉纹夜蛾的卵被弯斑 Chelonus 属（近弯斑 Chelonus curvimaculatus）（茧蜂科）的昆虫叮咬时，发育中的寄主幼虫会过早地结茧，但随后在预蛹阶段发育停滞。即使在被叮咬并过早结茧但解剖后未发现明显寄生虫的寄主中，也会出现这种情况。与对照组相比，向假寄生或切除咽侧体的幼虫注射放射性标记的蜕皮激素后，蜕皮激素转化为 20-羟基蜕皮激素的速率受到抑制。数据表明，发育停滞的假寄生预蛹的出现是由于蜕皮甾体的产生减少以及蜕皮激素向 20-羟基蜕皮激素的转化减少，这两者可能都是由于保幼激素滴度受到抑制所致。
