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.
90% of homozygous first instar larvae die within 7 days after hatching. The mutant larvae take up normal amounts of food. No obvious morphological or motor defects are seen.
