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Growing Degree Days @ Peach Ridge from
1st Green tissue: Base
42 = 1077 Base 50 = 609
Apple Pests
Oblique Banded Leafroller
Most larvae are getting large and pupae can
be found. Some reports of small overwintering larvae still showing up.
These may be delayed in their development particularly if B.t. was applied.
Adults have been flying for about a week. Expect adult flight to continue
and trap numbers will rise. Biofix at first adult flight and look ahead
to 400 to 450 DD43 for first hatch – approximately 6/23 with first sprays
on around 7/4.
Apple Maggot
None reported. Expect we might see 1st
trap catches from abandoned blocks in the next 7 to 14 days. Trap catches
from commercial sprayed blocks will be delayed.
Codling Moth
Egg hatch began about a week ago – we are
probably at peak egg hatch right now. Adult flight is just past peak and
trap numbers should start to decline. Few eggs are typically laid with
evening temps below 62 degrees, but egg-laying increases when night temps
get above 70 degrees.
Plum Curculio
Normal to low numbers of adult egg laying
scars. We are most likely past peak damage timing. Continue to monitor
for egg laying – it should taper off.
Red Banded Leafroller
4th instar larvae can be found in normal numbers.
Expect next generation adults to emerge at anytime in the next week or
so.
Spotted Tentiform Leafminer
Tissue feeders are present. Mines are found
in normal numbers for this time of year. Tissue feeding larvae to pupate
at anytime. The next flight of adults will probably be caught this week.
European Red Mite
Populations appear to be low in number for
most of the Grand Rapids area. Continue to monitor hot spots in blocks
that traditionally have ERM problems.
Rosy Apple Aphids & Green Apple Aphid
Colonies can be found in commercial blocks.
Continue to monitor for their presence. Be aware of predators that may
help control populations.
White Apple Leafhopper
Adults are starting to be seen in light to
normal numbers. No new nymphs yet. Continue to monitor for stippling damage
to leaves.
Potato Leafhoppers
Adults continue to be found in very light
numbers. 1 instar nymphs are starting to show up. Southerly-based storms
can rain them down here. PLH feeds near the edges of leaves possibly causing
the leaves to curl downwards (hopper burn).
Eye-Spotted Bud Moth
Adults continue to fly. Expect first larvae
at any time.
Tufted Apple Bud Moth
Adults continue to be caught. Expect first
larvae at any time.
Apple Rust Mite
Normal numbers present for this time of year.
Monitoring in blocks that have had problems with Rust Mites in the past.
Dogwood Borer
Larvae and pupae can be found in the burr
knots of M9 rootstocks in problem blocks. No adult flight reported. Expect
adult flight at anytime. Traps should be placed soon for first adult moth
flight. You may catch Lesser Peach Tree Borer in Dogwood Borer traps .
Tarnished Plant Bug
Nymphs and adults are active in light to normal
numbers. Finding in stone fruits, apples and strawberries. Monitor for
fruit damage. Feeding damage in apple should end at anytime. They are usually
most abundant in orchards with high broadleaf weed numbers.
Stone Fruit Pests
Green Peach Aphid
Present in normal numbers. Monitor for their
presence and population growth.
American Plum Borer
Adults are flying. Control sprays should be
going on. Control sprays are usually applied in early June with other borer
sprays.
Lesser & Greater Peach Tree Borer
Adults are present and being trapped. Expect
trap catches to level off and decline..
Cherry Fruit Fly
None reported. Expect 1st flies to show up
soon. Set traps for monitoring.
Black Cherry Aphid
Just starting to show up. Monitor blocks for
problem populations.
Oriental Fruit Moth
Flagging of terminals continues to be seen
in light to normal amounts. Monitor for damage to shoots. You may see fruit
feeding damage on small peach fruits also especially if a leaf is touching
a cluster of fruits.
Beneficial Insects
Ladybird Beetles – adults and larvae
can easily found in many orchards.
Yellow Predator Mites - Zetzellia
mali and Agistemus are present.
Lacewings - found feeding on aphids
and scales.
Syrphid Fly larvae – can be found feeding
on aphids
Continue to look for predators and consider
their effectiveness when choosing control programs for problem pests.
Growing Degree Days @ Peach Ridge from
1st Green tissue: Base
42 = 895 Base 50 = 485
Growth Stage for McIntosh:
15 mm
Apple Pests
Oblique Banded Leafroller
Various sizes can be found, but most are getting
large. Pupae can be found. Mating disruption dispensers should be in blocks
ASAP.
Expect that next generation adults will probably
be trapped in the next 7 to 10 days.
Apple Maggot
None reported. Expect we might see 1st
trap catches from abandoned blocks in the next 14 to 21 days. Trap catches
from commercial sprayed blocks will be delayed.
Codling Moth
Egg hatch predicted for early this week (6/2
– 6/5) based on biofixing on 5/14 – 5/17. This timing is for 3% egg hatch
and coincides with peak adult flight. Few eggs are typically laid with
evening temps below 62 degrees, but egg-laying increases when night temps
get above 70 degrees.
Plum Curculio
Reports of adult egg laying scars in the Grand
Rapids area were seen last week. Normal to low numbers. Continue to monitor
for egg laying.
Red Banded Leafroller
3rd and 4th instar larvae can be found. Larvae
will continue to develop and gain size. Expect next generation adults to
emerge mid-June.
Spotted Tentiform Leafminer
Trap catches have declined. Tissue feeders
are present. Mines are found in normal numbers for this time of year. Expect
tissue feeding larvae to pupate next week and the next flight of adults
will probably be caught in the next 10 days to 2 weeks.
European Red Mite
Hatch continues. Adults can be found and will
start laying eggs. Numbers can be high in the hot spots. Look for newly
hatched nymphs and adults in the folded leaves – especially on water sprouts
in the center of the trees. Monitor for early bronzing.
Rosy Apple Aphids & Green Apple Aphid
Colonies can be found in commercial blocks
and they are spreading. Continue to monitor for their presence. Be aware
of predators that may help control populations.
White Apple Leafhopper
1st through 4th instar nymphs can be found
in light to normal numbers. Continue to monitor for stippling damage to
leaves. Adult stage should be reached within the next week.
Potato Leafhoppers
Reports of adults being seen in very light
numbers. They travel up from overwintering sites in the southern US on
thunderheads. They arrive here as adults. Southerly-based storms can rain
them down here. PLH feeds near the edges of leaves possibly causing the
leaves to curl downwards (hopper burn).
Eye-Spotted Bud Moth
First adults are being caught. Expect adult
emergence to continue.
Tufted Apple Bud Moth
Adults just starting to be caught. Expect
trap catches to increase.
Apple Rust Mite
Normal numbers present for this time of year.
Monitoring in blocks that have had problems with Rust Mites in the past.
Dogwood Borer
Larvae can be found in the burr knots of M9
rootstocks in problem blocks. No adult flight reported. Expect adult flight
at anytime. Traps should be placed soon for first adult moth flight. You
may catch Lesser Peach Tree Borer in Dogwood Borer traps – the lures are
similar.
Tarnished Plant Bug
Nymphs and adults are active in normal numbers.
Finding in stone fruits, apples and strawberries. Monitor for fruit damage.
Feeding damage in apple should end at anytime. They are usually most abundant
in orchards with high broadleaf weed numbers.
Stone Fruit Pests
Green Peach Aphid
Present in low to normal numbers.Monitor for
their presence and population growth over the next week.
American Plum Borer
Adults are flying. Control sprays are usually
applied in early June with other borer sprays.
Lesser & Greater Peach Tree Borer
Adults are present and being trapped. Expect
trap catches to increase.
Cherry Fruit Fly
None reported. Expect 1st flies to show up
soon. Set traps for monitoring.
Black Cherry Aphid
Just starting to show up. Monitor blocks for
problem populations.
Oriental Fruit Moth
Adult flight is declining and trap numbers
are dropping off. First flagging of terminals can be seen in light to normal
amounts. Monitor for damage to shoots. You may see fruit feeding damage
on small peach fruits also especially if a leaf is touching a cluster of
fruits.
San Jose Scale
First males are flying. Monitor in problem
blocks.
Strawberry Pests
Spittlebug
Nymphs can be found feeding. Continue to monitor
for their presence.
Strawberry Clipper
Damage from adults can be seen in light to
normal amounts – especially in hot spots. Monitor for injury to flower
and fruit stems.
Tarnished Plant Bug
Reports of TPB continue in strawberries. Sprays
should be going on to prevent catfacing of new fruits. Monitor for their
presence and damage. Especially a problem in weedy fields.
Beneficial Insects
Ladybird Beetles – adults and larvae
can easily found in many orchards.
Yellow Predator Mites - Zetzellia
mali and Agistemus are present.
Lacewings - found feeding on aphids
and scales.
Syrphid Fly larvae – can be found feeding
on aphids
Continue to look for predators and consider
their effectiveness when choosing control programs for problem pests.