Excision of the P{SUPor-P}Exo70KG08051 insertion, which has resulted in a large deletion of material upstream of the site of the insertion, including the first 3 exons of Exo70.
The Df(3L)KG08051-exc13 chromosome shows recessive semi-lethality; less than 50% of the expected number of homozygous adults eclose out of their pupal cases and those that do die within 1-2 days of eclosion.