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 Twospotted Spider Mite. This mite overwinters as
an adult on perennial plants (weeds) and orchard trees.
Dormant oil sprays are not effective for controlling this
species, however, most other miticides are satisfactory. In
spring, two-spots serve as food for the predator mite,
Amblyseius fallacisand Stethorus punctum(lady bird
beetles) before they climb trees in search of European red
mites.
White Apple Leafhopper. The white apple
leafhopper has become resistant to commonly used cover
spray insecticides such as Guthion and Imidan. Carzol,
Lannate, Thiodan, Provado, and Vydate 2L are labeled for
leafhopper control. Overwintered eggs begin hatching at
pink, and hatching is usually over by petal fall. Whitish
nymphs and adults feed on the lower leaf surface, which
causes the leaves to appear a mottled yellow to white.
Sticky honeydew secretions from leafhopper feeding
frequently cover lower fruits. In orchards where
leafhoppers have become troublesome, it is important to
include an effective leafhopper control in the petal-fall to
first-cover period. Carzol, Provado or Thiodan are
suggested at this time because they are the least toxic to
European red mite predators. Later leafhopper generations
can be suppressed with Vydate, Carzol, or Provado.
Agrimek (abamectin) (0.15 EC)is a
miticide/insecticide labeled for control of mites and
tentiform leafminer on apple and mites and pear psylla on
pears. It is very effective when timed properly. Agrimek
penetrates quickly into leaves to form a reservoir of active
material. Agrimek should be applied with a minimum
1% or 1 gallon of oil per acre or a silicone-based surfactant
before leaves harden-off.
Ambush(see permethrin)
Apollo (clofentizine) (42SC). Apollo is a tetrazine
compound for mite control on apples, pears, peaches,
nectarines, cherries, and apricots. It is primarily an
ovicide but also controls young motile stages. It has no
direct effect on adult pest mites but is safe against natural
enemies. On apple, Apollo can only be used at or before
the tight-cluster stage. On the remaining tree fruit, it is
used during the foliar season. Best results are achieved in
spring when red mite eggs are hatching and before adults
are present. If many adult mites are present, Apollo can
be combined with other adulticides. Thorough coverage
is essential for control. Apply only once per year.
Rotating between Savey and Apollo may delay resistance
development to these products.
Asana (esfenvalerate)(XL-0.66EC) is a pyrethroid
insecticide labeled for control of many insects on pome
and stone fruit. On pears, it is frequently used prebloom
against pear psylla. It can also be used against several
stone fruit pests including oriental fruit moth, plum
curculio, periodical cicada, plant bugs, tufted apple
budmoth and as a trunk spray for controlling peach tree
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and lesser peach tree borers. It is also effective against
pests of apple including oblique banded leafroller, codling
moth, variegated leafroller, white apple leafhopper,
tentiform leafminer, apple aphid (green), tufted apple
budmoth, plum curculio, apple maggot, red-banded
leafroller, green fruitworm, rosy apple aphid, and plant
bugs. Asana, like other pyrethroids, is toxic to mite
predators and its use probably will encourage mite build
up. Therefore, Asana is not generally recommended for
post-bloom application. Do not apply Asana closer than
21 days before harvest for apples, 28 days for pears, and
14 days for peaches. See the label for other restrictions.
Bacillus thuringensis(B.t.)(Biobit, Dipel,
Javelin, MVP, SOK, Thuricide, and Xentari)
(wettable powder) are safe, biological insecticides labeled
for control of cankerworms, gypsy moth, variegated and
red-banded leafrollers, tufted apple bud moth, and tent
caterpillars at the rate of 0.5 to 1 pound. These materials
are nontoxic to bees and mite predators and may be
applied up to harvest.
Carzol (formetanate hydrochloride) (92SP)is a
carbamate insecticide/miticide registered for control of
mites, plum curculio, and plant bugs on peaches; mites
and thrips on nectarines; and mites, leafhoppers,
leafminers, and thrips on apple. Carzol is recommended
at 12.0 to 20.0 ounces per acre. Apply no more than 4
pounds of Carzol per acre in one crop season. This
material is most effective on European red mite and least
damaging to predator mites when applied during pink and
petal fall. Carzol seems to be less effective in summer
when eggs, nymphs, and adults are equally abundant.
Diazinon (50WP) is an organophosphate insecticide
with broad spectrum insecticidal activity labeled for pests
of stone and pome fruit. Do not apply within 21 days of
harvest. Diazinon is moderately toxic to Stethorus
punctumlarvae and adults.
Dimethoate (2.67EC and 4EC) is marketed as
Dimethoate E267, Cygon, De-Fend, and Rebelate. It is a
systemic, organophosphate insecticide recommended
primarily for sucking insect control on apple and pear.
Dimethoate is also labeled for white apple leafhopper,
codling moth, plant bugs, and apple maggot control.
This material is highly toxic to bees so do not apply to
blooming trees or flowering ground cover. Do not apply
within 28 days before harvest.
Guthion (Azinphosmethyl) (50WP) is an
organophosphorous insecticide with broad-spectrum
activity against many tree fruit pests. It is recommended
for use in IPM programs because it is not highly toxic to
mite predators when applied according to label directions.
Imidan (phosmet) (50WP) is an organophosphate
insecticide recommended in several cover sprays for
control of codling moth, plum curculio, apple maggot,
red-banded leafroller, and Oriental fruit moth. It is not
effective against mites, aphids, or leafhoppers. White
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