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BULLETIN 643, U. S. DEPARTMENT OE AGRICULTURE. 
COWPEAS. 
Although cowpeas are not grown to any great extent in Hawaii, 
they are subject to melon-fly attack. Only the pods are affected. As 
many as 37 larvae have been taken from a single pod. \Yhen infesta- 
tion occurs early the young seeds may be devoured, but attack is cen- 
tered more often upon the pod itself. Some varieties of cowpeas 
appear to be less liable than others to attack by the melon fly. 
FRUITS AND VEGETABLES THAT ARE SELDOM OR NEVER ATTACKED. 
Several observers have stated that' the melon fly attacks eggplant, 
bell peppers, cabbage, and kohlrabi. During a period of three years 
the representatives of 
the department have 
not found any of 
these vegetables af- 
fected. The Mediter- 
ranean fruit fly has 
been found attacking 
eggplant and bell 
peppers, but only in 
small numbers. Even 
in the laboratory egg- 
plant was found im- 
mune to melon - fly 
attack if the fruits 
were sound. Adult 
melon flies, however, 
were reared from 
fruits first weakened 
by decays. 
Adults have been 
reared from orange, 
mango, fig, papaya, 
p e a c h, apple, and 
water lemon. These 
as hosts of the melon fly. 
flv attack them, and then 
Fig. 21. — Damage to squash by larvae of melon fly. Of the 
two fruits illustrated, the one to the right is normal. 
and the one to the left, the stunted and deformed fruit 
caused by melon-fly attack. (Authors' illustration.) 
fruits, however, do not serve regularly 
Only in rare instances does the melon 
only slightly. For practical purposes aside from quarantines all the 
fruits and vegetables listed under this subheading are free from 
attack bv the melon fly. 
INTERESTING FACTS CONCERNING THE ADULT FLY. 
The most interesting facts about the adult melon fly center about 
the length of life and the capacity to lay eggs. No flies have been 
