injury is caused by the young bugs (nymphs) sucking the sap from the small green
berries. The adult bug overwinters in the adult stage and is present in berry
1 patches at blooming time.
Contrgh Fairly good control of this insect on other crops has been secured
with 5% DDT dust applied at the rate of 30 pounds per acre. Chlordan by itself
is ineffective but mixed dusts containing 10% chlordan and 5% DDT have given
control superior to that obtained with DDT alone. Other materials which have
given good control of plant bugs in experimental tests in other states are 2 /2
parathion, 20% chlorinated camphene and benzene hexachloride (3% gamma isomer
Injury. Plants wilt suddenly and die. Digging shows large white grubs
(Fig. 9) of l\/lay beetles have eaten off the large roots or gouged out the crowns
(Fig. 8). .
Qontrci. Grow a cultivated crop for at least 2 years before setting
strawberries. Plants set on land infested with grubs can be protected from
attack by putting 1-1/Z ounces of a mixture of 1 part of lead arsenate and 20
parts of fine, dry sand on the roots and in each hole when plants are set. When
plants are found wilted because of grub attack, dig out the grubs and destroy
them before they can move to other plants.
lnjjgirh Folded leaves turn brown and clie. Damage caused by a small
Control If severe damage has been caused to new plantings, spray or 3
dust three times at weekly intervals in the fall to destroy the overwintering
population. Use a cryolite dust made of 1 part cryolite, 2 parts talc, and Z
parts of flour; or spray with 3 pounds of lead arsenate in 100 gallons of water;
or spray with 5 pounds of cryolitein 100 gallons of water, using some good *
spreader, If treatment is delayed until spring, treat before blossom time.
lijury. Newlyset plants are cut off at or just below the ground
Qgntrol, Use poison bait prepared from 1 pound paris green mixed
with Z5 pounds of bran. Add just enough water to moisten all the particles
but not enough tomake the mash sloppy, Scatter the bait evenly over the
patch at dusk, using 10 to 15 pounds per acre.