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New England Pest Monitoring and Management Checklist Number 4
May
150 - 199 GROWING DEGREE DAYS

BEGIN BLOOM
Aesculus hippocastanum (horsechestnut)
Crataegus spp. (hawthorn)
Spiraea x vanhouttei (Van Houtte spirea)
Syringa vulgaris (common lilac)

FULL BLOOM
Cornus florida (flowering dogwood)
Cytissus scoparius (Scotch broom)
Prunus x cistena (purpleleaf sand cherry)
Prunus maritima (beach plum)
Spiraea prunifolia (bridalwreath spirea)

END BLOOM
Forsythia spp. (golden bells)
Prunus subhirtella (Higan cherry)
Rhododendron carolinianum (Carolina rhododendron)
Rhododendron 'PJM'

PLANT PEST ACTION
Birch Birch Leafminer Inspect sticky traps for black adults. Treat with registered pesticide if needed.
Cherry Eastern Tent Caterpillar Inspect for larvae webs and plant injury
Crabapple Eastern Tent Caterpillar Inspect for larvae webs and plant injury.
Dogwood Dogwood Borer Inspect trunk and large branches for holes and fresh sawdust. Destroy by hand or treat with nematodes
Euonymus (deciduous) Euonymus caterpillar Inspect tips for yellow larvae and silk. Young larvae vulnerable to B.T. or other registered pesticide
Hardwoods Cankerworms Inspect leaves for holes and looper larvae. Young larvae vulnerable to B.T. or other registered pesticides.
  Forest Tent Caterpillar Inspect leaves for caterpillars. Young larvae vulnerable to B.T. Treat with registered pesticide if needed.
 

Gypsy Moth

Inspect leaves for holes and larvae. Young larvae vulnerable to B.T. or other registered pesticides.

Hemlock Hemlock Woolly Adelgid Inspect for cottony masses at base of needles and crawlers on twigs. Treat with registered pesticide
Inkberry Inkberry Leafminer Check yellow traps for small gray flies and treat if needed with registered pesticide.
Lilac Lilac borer Inspect trunk and large branches for holes and fresh sawdust. Destroy by hand or treat with nematodes.
Honeylocust Honeylocust Pod Gall Midge Install yellow sticky traps. Inspect traps for small orange flies. Treat with registered pesticide if needed.
Needled Spruce Spider Mite Shake branch over white surface. Look for tiny reddish Evergreens mites. Treat with registered pesticide if needed.
Pine (Hard) European Pine Sawfly Inspect needles for dark green larvae. Handpick or treat with registered pesticide if needed.
  White Pine Weevil Inspect leaders for holes, sap flow and tip curl. Prune out infested leaders.
Pine (Soft) Pine Bark Adelgid Inspect trunk and branches for white, cottony masses. Increase vigor, reduce stress. Treat with registered pesticide.
  Pine Spittlebug Inspect for spittle masses along branch tips. Ignore, remove by hand or treat with registered pesticide.
  White Pine Aphid Inspect tips for brown nymphs. Check for ladybugs and treat if needed with registered pesticide.
  White Pine Weevil

Inspect leaders for holes, sap flow and tip curl. Prune out infested leaders.

Willow Imported Willow Leaf Beetle Inspect for small bluish-black beetles. Treat with registered pesticide if needed.


END: Cooley Spruce Gall Adelgid (fir), Hemlock Eriophyid Mites, Pear Thrips

150-199 GDD
May

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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