































La J ia i m 
; Hi C, McBride and hk. C. Mason, Honolulu, have wade # study of the 
fect upon the mango weevil (Sternochetus wanziterse Fab.) of subjecting 
66 10 low temperatures, Ah considerable quantity of late maturing 
cs was subjected to temperatures ranging from 19° to 20° F., one tray, 
yor esieing approximately 100 fruits, being removed at the end of each 24~ 
our period, Incidentally, the fruit was frozen solid and on thawing 
he flesh woe injured, The actual infestation of fruit ranged from 9 
per cent 10 89 per cent, and involved 4 total of 1,721 weevils. Ur. 
me vide and Ur, Mason report: “Larvae of the mango weevil are less re- 
Bietant to 20° ¥, than either the adults or pupse. Vive days are suffici- 
ont to kill 411 the larvae. It requires 7 days’ exposures to give 100 
of ir cent Kill of the pupae. * * * These data show that a period of more 
ey 15 days is required to give 100 per cent kill of the adults.” It 
y impossible to secure fruits to continue the study until 211 the adults 
nore dea4, 
The outstanding achievement in nutritional studies in connection 
With the Wediterranean fruit fly conducted by ©. B. Keck, of Honolulu, 
was the rearing of one individual on heated yeast and distilled water. 
. Keck says: “This individual was from a group of ten newly hatched lar- 
s which were fed on this material alone during the lerval stage. The 
adult was a female and appeared to be 4 normal individual.” 
ib 
; 
? 
mf 
The vapor-sterilization studies on avocados continued during Sep- 
ember, by 0. C, McBride at the Honolulu laboratory, confirm the previous 
ft ndings that the treatment of avoceéos with high temperatures does not 
Give satisfactory results. Mr. McBride states, however, that "pineapple 
Tey nie heated for one-half hour after the inside temperature of the 
plants reaches 50° C. give 100 per cent kill of the pineapple sealybug 
(Peeudococcus brevipes Cu11.)" 

TRUCK CROP INSECTS 
i+ "The tacinid Phorocer2 claripenpnis Wacg. appeared early in the 
Beason as 4 parasite of larvae of the Mexican bean beetle (Epilachna cor 
tupta Muls.),” according to B. J. Landis, of Columbus, Ohio. “Approzxi- 
mately 2 per cent parasitism occurred during August and September among 
deld-collected larvae. The life cycle of this tachinid is slightly 
oxy than that of Paradexodes epilachnze Ald. Bean-beetle larvae para- 
sitized by these two tachinids have different appearances. 4A larva hatch- 
from the white egg of P. claripennis leaves a black sunken scar in 
the host exoskeleton after it has entered. A dzy previous to emergence, 
the mature maggot of P. claripennis appears surrounded by <2 dull, muddy 
4. On emerging, the maggot eats 2 large, ragged hole in the interior 
ventral part of the host wall; the posterior end of the maggot does not 
laper, but ends abruptly and the two anal spiracles areseparated. The 
‘puparius is generally lighter in color than that of P. epilachnae and is 
narrower toward the posterior end. A larva hatching from the transpar- 
it egg of P. epilachnaze enters and 4 comical mass of cried yellow ex- 
ola = 

