DDT for chestnut weevils, American Fruit Grower 67: 28.
1946) This spray, which we have used on the ground as well as on the
young burs, kills Japanese beetles as well as the weevils. This fall I
have seen very few weevils in our whole crop of nuts.

The louse, _Callaphis castaneae_, appeared on July 5, 1947, at least the
leaves became so much curled that its presence was then noticed. Two
spraying on successive days with nicotine sulphate ("Black Leaf 40")
were sufficient to control it. With us this insect attacks leaves of
American stock only. Japanese-American hybrids are also susceptible, but
not Chinese-American or American-Chinese. The lice, of an orange color,
congregate in great numbers along the midrib of the leaf, sucking out
its juices.

This summer, perhaps on account of the unusual almost tropical weather
conditions--hot and humid with continually recurring showers--we have
been harassed by a new pest which has appeared in one of our plantations
only sparingly for five or six years--a mite, which Connecticut
Agricultural Experiment Station authorities say is _Paratetranychus
bicolor_. Affected leaves have a whitish or grayish color chiefly along
midrib and principal veins, due partly to the deposit of the creature's
shells on molting, and partly to injury to the tissues of the leaf.
Hexa-ethyl tetraphosphate, known in the trade as "Killex 100," was used
effectually twice as a spray. Unfortunately this chemical has no
ovicidal properties, so that a second spraying was necessary to kill the
mites newly hatched out from thousands of eggs. We are informed that DN
111 will kill the eggs as well as the mites and will kill aphids at the
same time. The mites seem to prefer Chinese chestnut leaves, but this
summer they didn't seem particular and spread from one badly infested
tree as a center.

[Illustration: Fig. 1--Japanese-American hybrid chestnut (Hammond 86-31)
34-1/2 feet in height, 16 years old. This is the same tree three years
later as that shown in figures 1 and 2, in 35th Ann. Rept. of Northern
Nut Growers Assoc. for 1944. Note healthy development, as shown by
foliage and long yearly growth. Hamden, Conn. Photo. Sept. 13, 1947 by
Louis Buhle.]

_Chinese Chestnuts._ I am enthusiastic about Chinese chestnuts as a nut
substitute for our old native chestnuts. The Chinese are quite blight
resistant. They are attacked by the blight fungus--at least most
individuals suffer at some time in their lives, and y