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STORED PRODUCT INSECTS 
Burning pea fields soon after harvest aids in weevil control.— 
A.O. Larson, Corvallis, Oreg., reports as follows on the value of burning 
stubble and threshed vines as a means of killing adult pea weevils (Bruch- 
us pisorum L.): "On March 2 we examined approximately 3500 fence posts 
about two pea fields at Hillsboro and Orenco. Only one pea weevil was 
found about one field and only four about the other. Both fields had been 
burned as soon after harvest as possible. Both fields were surrounded 
by woods so that plenty of nearby hibernating quarters were available, 
but apparently very few weevils had escaped." 
Harvest loss in relation to pea weevil control.——Tom Brindley, Mos— 
cow, Idaho, summarizes a 2-years' study of harvest loss as compared with 
weevil infestation. He states: "This study was carried on in 1932 in the 
Same manner as in 1931, Six plots 10 feet square were picked at random 
about each of the fields studied. Nineteen fields were examined, 12 of 
which were harvested by the combine; 5 were mowed and threshed by a sta-— 
tionary thresher; and 2 were harvested by miscellaneous methods. * * * 
The harvest loss for 1932 was much less than for 1931 * * * 9 fields 
were examined each year. In 1931, the average loss for these fields was 
28 percent, and only 11 percent in 1932. * * * much of the loss is due 
to the way the peas are harvested, for the same farmers had the heaviest 
loss each year. The smaller loss in 1932 may be due to the greater 
length of the vines in that year. Some of the decrease in loss may also 
be due to the education of the farmers against loss. The decrease in 
harvest loss automatically decreased the number of weevils escaping from 
shattered peas. The average loss for 9 fields in 1931 was 477 pounds, 
and the average infestation was 28 percent, while in 1932 the average 
loss in the same 9 fields was 183 pounds per acre and the average in- 
festation was ll percent." 
Relative abundance of Ephestia larvae overwintering under grape- 
vine bark.--On March 3 D. F. Barnes and H. C. Donohoe, Fresno, Calif., 
completed examinations of the same 18 vineyards that were visited in 
1932. "The average infestation by Ephestia spp. was 128 larvae per acre. 
In 1932 the population was 922 per acre and in 1931 113 per acre. * * * 
The above data show that Ephestia larvae under bark are present in about 
the same numbers this year as in 1931; however, in 8 vineyards out of 18 
examined in 1933 no larvae were found, whereas in 1931 no larvae were 
found in 3 of the 16 vineyards examined, indicating a more uneven distri- 
bution of infestation in 1933. With our present knowledge it is not pos— 
sible to predict what the developments will be, since weather conditions 
and prevalence of parasites later in the season appear to influence the 
damage done to figs and raisins by Ephestia figulilella Greg., the domi- 
nant species." 
Life history of Nemeritis canescens Grav.--Mr. Donohoe reports 
that he has "completed the rearing from egg deposition to adult emer-— 
