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New England Pest Monitoring and Management Checklist Number 15
Late July-Early August
1400 - 1699 GROWING DEGREE DAYS

BEGIN BLOOM
Ailanthus altissima (seed color)

FULL BLOOM
Clethra alnifolia (sweet pepperbush)
Hibiscus syriacus (rose-of-Sharon)
Vitex agnus-castus (chaste tree)

END BLOOM
Hypericum patulum (goldencup)

PLANT PEST ACTION
Andromeda Andromeda Lacebug (2nd gen.) Inspect underside of new growth for nymphs. Treat with registered pesticide if needed.
Azalea Azalea Bark Scale Inspect twig crotches for white, waxy females, pinkish eggs and crawlers. Treat with registered pesticide if needed
Birch Bronze Birch Borer Inspect for fresh D-shaped emergence holes and overall health. Treat trunk and branches with registered pesticide if needed.
Catalpa Catalpa Aphid Inspect underside of leaves for green-yellow nymphs. Look for lacewing eggs, ladybugs, and other natural enemies.
Cherry Cherry Scallop Shell Moth Inspect foliage for silken nests and yellowish caterpillars. Prune out or treat with registered pesticide.
Crabapple Eastern Tent Caterpillar Examine branch tips for shiny black egg masses and remove.
Dogwood Dogwood Borer Inspect trunk and large branches for holes and fresh sawdust. Destroy by hand or treat with nematodes.
Euonymus Glover Scale Look for white crawlers on underside of leaves. Treat with registered pesticide if needed.
Fir Cooley Spruce Gall Adelgid Look for waxy nymphs on bent needles. Treat with registered pesticide if needed.
Hardwoods Fall Webworm Check tip leaves for eggs and larvae. Prune or treat with B.T. or other registered pesticide.
  Japanese Beetle Examine leaves for adults and skeletonizing. Treat with registered pesticide if needed.
  Two-Spotted Spider

Mite Strike branch on white surface. Check for white mites.

Hemlock Hemlock Scale Look for white crawlers on underside of needles. Treat with registered pesticide if needed.
Honeylocust Honeylocust Mite Shake branch over white surface. Look for reddish-brown mites and treat with registered pesticide if needed.
Mimosa Webworm Small, gray-brown larvae webbing leaflets near tips. Prune out or treat with B.T. or other reg. pesticide
Juniper Juniper Webworm Inspect interior foliage for early mines and silken tubes. Treat with B.T. or other reg. pesticide.
Linden Aphids Check foliage for nymphs, honeydew, and natural enemies before making treatment decision.
Pine (Hard) Pine Needle Scale Look for reddish-orange crawlers on needles. Treat with registered pesticide if needed.
 

Red-headed Pine Sawfly

Examine needles for clusters of yellow larvae. Pick off or treat with registered pesticide if needed.
Rhododendron Rhododendron Borer Inspect large lower branches for holes and fresh sawdust. Destroy by hand or treat with nematodes.
Sharpshooter Leafhopper Check new growth for large, green and orange leafhoppers. Treat with registered pesticide if needed.
Spruce Cooley Spruce Gall Adelgid Treat with registered pesticide if galls are open.
Tulip Poplar Aphids Check foliage for nymphs, honeydew, and natural enemies before making treatment decision.
Tupelo Tupelo Leafminer Inspect leaves for eggs and early mines. Treat with registered systemic pesticide if needed.
Yew Black Vine Weevil Check burlap traps for adult weevils. Treat with registered pesticide if needed.

END: European Fruit Lecanium, Fletcher Scale, Green Peach Aphids, Lacebug (hardwoods), Lilac Leafminer

1400-1699 GDD
Late July-Early August

Additional Information:
Bacillus thuringiensis (B.t.)
Beneficial Nematodes
Bio-Rational Pesticides
Current Growing Degree Day Accumulations
Filing a School IPM Plan in Massachusetts Adobe PDF icon
Fundamentals of An Insect and Mite IPM Program
Horticultural Oils
Managing Insects Using Superior or Horticultural Oils
Monitoring: Growing Degree Days and Plant Phenology
Monitoring and Management Checklists
New Insect Products and How They Work

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