FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
Mutant animals which survive to 60 and 96 hours after egg laying (AEL) are dramatically smaller than wild-type sibling controls. The surviving larvae are lethargic and unresponsive to external stimulus and the few animals that survive to 96 and 120 hours AEL fail to show larval wandering behaviour.