Some Insects Attacking the Peach. ii 
faded out, pallid appearance of the foliage, dotted here and there 
with little black specks of excreta. Plate I Fig. 3 shows two peach 
leaves which have been attacked and two which are normal from 
the same tree, and gives a good idea of their appearance after this 
pest has been feeding upon them. 
Control Measures .—Experiments recorded in Bulletin 152 
show that tobacco preparations are of little value in controlling this 
mite; that they will kill the mites, but not the eggs. As the latter 
are almost always present on a tree where the mites are feeding, 
such sprays can only be effective when repeated applications are 
made. The sulfur spray was again tested this season, this time at 
Palisade, Colorado. Some badly infested pear trees were treated, 
using 10 pounds of sulfur to 50 gallons of water. Results of this 
test were perfect, and a week after the trees had been sprayed it was 
hard to find a living mite on them. 
An interesting point in connection with the sulfur treatment 
for brown mite is: The adult mites are not immediately affected 
by the spray, but those newly hatched die shortly after the applica¬ 
tion. An examination of a tree the day after spraying with sulfur 
is usually disappointing, for the adult mites may be alive and abun¬ 
dant. In all the tests made a very few newly hatched, six-legged 
mites have been found, 24 hours after spraying, and in a week’s 
time neither adult nor newly hatched mites can be found. The sul¬ 
fur adhering to the bark and leaves, undoubtedly kills the young 
mites as they hatch from the eggs. Whether the older ones are 
killed by the sulfur or simply die a natural death is a point that has 
not been determined definitely. As there are probably only three 
broods of this mite, and they are quite long lived, it would seem that 
the sulfur really kills the adults, but that it takes some days to do 
so. The important fact remains that the young mites never develop 
after the sulfur treatment, whether hatched or in the egg stage at 
the time of treatment, and that the adult mites are either killed by 
the sulfur or die a natural death within 7 or 8 days after treatment, 
thus ridding infested trees of the pest. 
Lime and Sulfur an Efficient Remedy .—In Bulletin 152 the 
following statement was made: “Trees may be treated while dor¬ 
mant with lime and sulfur. This spray has no effect upon the eggs, 
but probably kills the young mites as they hatch.” The fact that the 
lime and sulfur kills the young mites as they hatch was definitely 
established last spring at Palisade, Colorado. 
Three adjoining peach orchards, each containing a great many 
brown mite eggs—two of them sprayed with Rex lime and sulfur 
1-10, and one not sprayed—were chosen as observation places to de¬ 
termine this point. The eggs were found hatching in all three or¬ 
chards at the same time; in the orchards which were sprayed a great 
