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stunted, curled, and discolored (yellow) by June.  Aphids
normally disperse to other host plants by mid-June. For
best results, Thiodan or Lannate should be applied dilute
at pink bud and again at petal fall. Lannate will provide
fair control of oriental fruit moth and catfacing insects.
Make applications before leaves become curled and
discolored.
Leafrollers. There are several species of leafrollers in
New Jersey orchards. Tufted apple bud moth and
variegated leafroller (see TABM and VL this section) are
two that are somewhat resistant to Guthion and Imidan.
The red-banded leafroller with three generations per year
and the fruit tree leafroller with one generation per year are
still susceptible to most insecticides. Lorsban 50W is
labeled for leafroller control. The most important times
to control these latter two pests are in the petal-fall and
first cover sprays.
Lesser Peach Tree Borer. This borer attacks weak
and injured trees, winter-damaged orchards, and diseased
trees Adult borers (moths) are attracted to injured trees
and deposit eggs in wounds from May through early July
and again in September. Insecticide protection is
recommended primarily for the control of the second
brood in early September, and slightly later in northern
counties. Applications should be made with a hand gun
to the point of run off, making sure to cover all cankers.
Lorsban 4E, Thiodan, Asana, or Pounce should be
applied post-harvest with a handgun. See labels for dosage
rates.
Oriental Fruit Moth. This pest attacks both stone
and pome friuit.There are normally four generations of
this insect each year but a fifth generation may occur in
the southern two-thirds of the state during a warm year.
First generation larvae bore into succulent twigs usually
about the time when shucks split. Later generations
attack developing fruit, often boring into the fruit as tiny
larvae, close to the stem. First brood larval control is
timed to degree day accumulations and usually
commences about the time shucks split. Insecticides
effective for oriental fruit moth control are
Ambush/Pounce, Asana, Diazinon, Guthion, Imidan,
Penncap-M, and Sevin. Lannate and malathion are also
labeled.
Peach Silver Mite. This is a very tiny mite that
feeds on leaf surfaces causing them to become silvery. In
orchards where sulfur is used, they are not a problem.
This mite is unlikely to cause injury. Thiodan and
Vendex are labeled for control.
Peach Tree Borer. Peach tree borers usually fly from
mid-June on but most of the larvae are present in the trees
by early September. Control can be achieved by
drenching the tree trunk and scaffold limbs with Thiodan
50WP at the 1.5 pounds per 100-gallon rate, Lorsban 4E
at the 1.5 quarts per 100-gallon rate, Asana XL at 4 oz per
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100 gallon-rate, or Penncap-M at the 1.5 to 2 pints per
100-gallon rate after harvest Trees should be treated for
peach tree borers the same time that the scaffold limbs are
treated for lesser peach tree borers. The fumigating action
of the insecticide, along with its residual action, should
give good kill for those larvae already in the tree, if
applied by early to mid-September. The residual action
should also provide control for those young larvae still
hatching from eggs. For best results, apply 0.5 to 1
gallon of spray to each trunk, preferably with a handgun.
Airblast sprayers are not suited for borer control because
not enough spray reaches the target area. Protect young
trees before planting with a Thiodan root dip. To prepare
dip, mix 1 pound of Endosulfan 50WSP with every 10
gallons of water. This solution must be agitated to
prevent settling out of the wettable powder. Endosulfan
3EC can also be used at the rate of 2-2/3 qts/40 gallons of
water. Lorsban 4E may be used as a pre-planting root dip
at the equivalent rate of 3 qts/100 gallons of water. Dip
trees to a point several inches above the bud scar and
allow them to dry. Dip trees several days before planting.
Note. Wear rubber gloves while making the treatment
and dispose of excess dip in area where people, pets, fish,
and wildlife will not be harmed.
Pear Leaf Blister Mitecauses brownish blisters
beneath the leaves. By late summer blisters may nearly
cover the entire under leaf. In spring as buds develop,
tiny (1/125-inch long) mites commence feeding on leaves,
forming blisters. Blister mites can be controlled at cluster
bud through first or second cover with Carzol SC (1.0-1.5
lb/A), Mitac 1.5 EC (2-3 Qt/A), OR Morestan 25WP
(4.0-5.0 lb/A). Do not use oil or spreader-stickers with
Morestan because of possible phytotoxicity. Allow at
least 7 days after an oil application before applying
Morestan.
Pear Psylla.This tiny insect has developed
resistance to practically all insecticides used for its control
since the 1960's. Psylla adults become active and start
laying eggs in spring as outdoor temperatures reach 45oF.
Yellowish-white eggs are laid on bud scales, bark cracks,
and crevices of fruiting spurs. Nymphs soon hatch and
commence sucking sap from tender young leaves. For
best results commence control early in the growing
season. Thorough spray coverage is absolutely essential
for control. A dilute spray application invariably results
in better, more lasting control than a concentrate
application. Pre-bloom Superior oil, plus a pyrethroid
insecticide (Asana, Ambush, or Pounce) applied dilute
during the dormant period when eggs are first laid, is still
one of the most effective means of delaying psylla build-
up. In problem blocks, a second oil application plus a
pyrethroid is advised during the green cluster bud stage.
Be sure to read the labels for restrictions when using
pyrethroids before bloom. Morestan can be added during
an early pink spray but do use in combination with oil, or
shortly before or after an oil application because of
phytotoxicity. There are other precautions, so consult the
Morestan label before using. Post-bloom use of any
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