Sa Sree 
and loosen or bend the foundation, causing imperfect combs to be built. 
Possibly the faults of these sections can be overcome, as the faults 
originally present in the ‘wooden sections have been overcome. Although 
these sections are cheap in first cost, the extra labor required in 
preparing them for use, the imperfect combs built, to say nothing of 
the inferior appearance of the sections, would rule them out for practi- 
cal use." 
FRUIT AND SHADE TREE INSECTS 
Control of cloudy-winged whitefly with sulphur sprays and dusts.—— 
Ralph L. Miller, Orlando, Fla., reports that "In order to determine the 
effect of sulphur on the hatching and mortality of eggs and larvae of 
Dialeurodes citrifolii Morg., leaves heavily infested with eggs were 
sprayed and dusted with lime-sulphur and water, 1 to 50; lime-sulphur, 
iron sulphate, and water, 1~1-50; lime-sulphur, calcium caseinate, and 
water, 1-1/2-50; a wettable sulphur, 5-50; and sulphur dusts, wet and dry. 
Three weeks later counts were made of the numbers of eggshells and dead 
and live whitefly larvae on 20 1/4-inch squares on each plot. The re— 
sults * * * show that sulphur has a considerable toxic effect on the eggs 
and larvae of the cloudy—winged whitefly. * * * Several very interesting 
and important points have shown up, as follows: (1) All forms of sulphur 
gave some control of the whitefly; (2) both iron sulphate and calcium 
caseinate increased the effectiveness of liquid lime-—sulphur; (3) the 
wettable sulphur was not so effective (60 percent control) as lime-sulphur 
(69 percent control), but was more effective than a (dry) dust; (4) sul- 
phur dust gave a fair degree of control (28.2 percent of eggs and larvae) 
when applied to dry foliage; (5) sulphur dust applied to wet leaves gave 
better control (71.5 percent of eggs and larvae) than did liquid lime— 
Sulphur spray used 1 to 50 (69.0 percent)." 
Bordeaux mixture on pecan trees increases infestation by black 
pecan aphid.--—"In July there was a decided increase in the infestation 
of the pecan black aphid in pecan orchards generally, and especially in 
orchards where trees were sprayed with Bordeaux mixture alone," reports 
G. F. Moznette, Albany, Ga. "Actual counts made during the month in ex-— 
perimental areas under observation show that where Bordeaux mixture has 
been applied for pecan scab control the population showed on an average 
10 times as many aphids per compound leaf as where no spray was applied. 
Apparently the environmental conditions in pecan trees are changed, fol- 
lowing Bordeaux applications favorable to aphid increase. It may be that 
photosynthesis is altered, CO2 assimilation changed, etc., producing this 
condition. Observations made to date do not indicate that the color of 
Bordeaux mixture on the foliage attracts the aphids to sprayed trees. 
Predators, such as ladybird beetles, lacewing flies, etc., have been 
about as numerous on the trees under observation before Spraying as 
after, and at no time have they been sufficient in numbers to keep aphids 
down." 
_———— a 
porting on meteorological conditions as influencing fruit-moth activity, 
Ger. steiner, Cornelia, Ga... Says, "Apparently light in excess of 25 or 
eS Ee eS eee a a ee 
