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New England Pest Monitoring and Management Checklist Number 2
Late March- Late April
50 - 99 GROWING DEGREE DAYS

BEGIN BLOOM
Acer platanoides (norway maple)
Amelanchier spp. (shadbush, serviceberry)
Magnolia soulangiana (saucer magnolia)
Pieris floribunda (mountain pieris)
Prunus serrulata (Japanese flowering cherry)
Pyrus calleryana (callery pear)

FULL BLOOM
Acer saccharum (sugar maple)
Forsythia spp.
Fraxinus americana (white ash)
Pieris japonica (Japanese pieris)
Rhododendron mucronulatum (Korean rhododendron)
Rhododendron 'P.J.M.'

END BLOOM
Acer rubrum (red maple)
Rhododendron mucronulatum (Korean rhododendron)
Magnolia stellata (star magnolia)

PLANT PEST ACTION
Birch Birch Leafminer Install yellow sticky traps. Examine traps or leaves for small black adult sawflies.
Cherry Eastern Tent Caterpillar Look for and remove egg masses and early tents.
Crabapple Eastern Tent Caterpillar Look for and remove egg masses and early tents.
Elm Elm Bark Beetle Inspect pheromone traps. Wait until beetles are caught before treating.
Fir Balsam Twig Aphid Inspect tips for green nymphs. If found, treat with registered insecticide.
Hardwoods Gypsy Moth Last chance to remove egg masses before hatch
Hemlock Hemlock Eriophyid Mite Inspect upper surface of needles for tiny, white, cigar-shaped mites. Treat with oil as needed.
Inkberry Inkberry Leafminer Inspect leaves for last years damage. Install yellow sticky traps. Examine traps or leaves for small gray-black flies.
Maple Maple Bladdergall Mite Apply dormant oil before leaf buds expand.
  Pear Thrips Pear Thrips Inspect traps periodically for tiny yellow-brown thrips.
Pine European Pine Sawfly Look for clusters of small, dark green larvae on newest needles. See Checklist 1.
  European Pine Shoot Moth Inspect for brown larvae in damaged buds and tips. Treat with registered insecticide if needed.
 

Pine Bark Adelgid

 Vulnerable to dormant oil.
  Pine Needle Miner Somewhat vulnerable to dormant oil.
  White Pine Aphid Look for brown nymphs along stems. Check for natural enemies before deciding to treat.
Turf White Grubs Sample root zone (see current UMass Extension Professional Guide for IPM in Turf), identify species and treat with registered insecticide if needed.


END: White Pine Weevil

50-99 GDD
Late March-Late April

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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