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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 13 
of calyx entrants also increases. The very marked difference between 
the figures obtained on the check trees as compared to both dusted 
and sprayed indicate the influences that are brought to bear in calyx 
worm control. Experiment 2 (dust) gave the best calyx worm control 
during 1917 where the ratio was found to be 92.99 to 7.01, side and 
calyx worms respectively. Experiment 4 (rods) followed with a 80 
to 20 ratio. The gun was not tested in this orchard in 1917. These 
blocks as has been stated were sprayed extra in September. The 
rods in the heavier infestation gave slightly better calyx control, 73.55 
per cent being side entrants as compared to 71.6 per cent in the dust 
block. 
Dusting work was not continued in the Arkansas Black orchard in 
1918 but was continued in a block of Newtowns in a different orchard. 
As will be noted in Experiment 6 the check block for this series of 
experiments developed a 17.64 per cent infestation. During this 
season throughout the district a greater percentage of side worms 
entered than calyx worms. The unsprayed (Exp. 8) checks developed 
73.29 per cent side worms as compared to but 26.7 per cent calyx worms. 
However, regardless of this rather small percentage of calyx worms the 
difference of amount in calyx worm control is again pointed out in the 
results obtained. During this season calyx entrants were cut down 
to 5.2 per cent in the dust block. These results were checked against 
a block sprayed with a gun in the same orchard which developed but 
.44 per cent wormy fruit (Exp. 7), and perfect control as far as calyx 
worm control is concerned. This work was continued in these same 
blocks in 1919, and though not presented on the chart gave the fol¬ 
lowing results. The check trees developed 80. per cent side and 20 
per cent calyx infestation. The figures in the dust block are 96.77 
per cent side worms and 3.22 per cent calyx worms. Unfortunately 
the gun block upheld the 1918 performance and developed not a 
single calyx worm in the apples counted. The figures look too good 
but nevertheless these are the ones obtained. At this point I might 
add that this orchard, outside of the experimental work that has been 
conducted with dust, has been sprayed with a gun only since 1917. 
Before being too firmly convinced of the relative merits of calyx 
worm control with dust and with spray gun a series of experiments were 
arranged in 1919 to compare the merits of the gun and rod in an 
orchard which had been quite wormy for several years. The orchard 
which was chosen for this work suffered a loss of 20 to 30 per cent dam¬ 
age in 1918. In 1917 the loss was even greater. In the spring of 1919 
many worms were found on the trunks of trees so there was no doubt 
but that there would be plenty of insects with which to work. Three 
blocks were chosen through the center of the orchard. One was 
