Effect of a juvenoid on the larval body color change depending on population density in Cephonodes (Hylas: Lepidoptera: Sphingidae)

Ikemoto, H.

New Entomologist 30(4): 1-4


Topical application of a juvenoid (ZR 515) to groups of 1st instar larvae of C. hylas caused the solitary pale pigmentation at the next instar. Pigmentation-inhibiting effect of ZR 515 was lost after the 2nd larval molt. ZR 515 was rapidly metabolized to a substance which does not show any JH activity.