|
|
|
Common Pests and Problems for
June
|
Indoor plants moved outside for the summer are very susceptible to scorch. Acclimate plants gradually to avoid setting them back.
|
|
|
|
|
Early in the month scout for bagworms. If found, treat while the caterpillars are still small and most vulnerable.
|
Bagworms
Bagworm (Lepidoptera) on lilyturf (Liriope)
|
|
|
Dethatch zoysia lawns as new growth begins to keep the lawn vigorous and reduce disease problems. Stop fertilizing cool-season grasses until fall.
|
|
|
|
|
Complete pruning of spring-flowering shrubs early so you don’t reduce flowering for next year.
|
|
|
|
|
Monitor for plant bugs on phlox and treat at the earliest signs to reduce ongoing problems. Mildew is another common problem of phlox and many other ornamentals.
|
Phlox Bugs
Phlox bug damage (Hemiptera) on phlox (Phlox)
|
|
|
Scout for Japanese beetles and lacebugs.
|
Japanese Beetle
Japanese beetles (Coleoptera) feed on over 300 species of plants
|
Lacebugs
White flecking on upper leaf surface on azalea (Rhododendron) caused by feeding of lace bugs (Hemiptera); heavy infestation
|
Lacebugs
Adult oak lace bug (Hemiptera ) on underside of bur oak leaf (Quercus macrocarpa)
|
Continue to treat for black spot of roses on susceptible varieties. You may also find damage from rose slugs and leaf cutter bees. Usually both are minor and don’t require treatment.
|
Black Spot of Rose
Yellowing rose (Rosa) leaves with black spots are characteristic of black spot of rose
|
|
|
Scout for damage from thrips and leafhoppers.
|
Thrips - Outdoors
Close-up of damage from thrips (Thysanoptera) on privet (Ligustrum)
|
|
Leafhoppers and Planthoppers
The damage on this silver maple leaf (Acer saccharinum) is typical of feeding by leafhoppers (Hemiptera) but it could be caused by a true bug
|
Common pests in the vegetable garden this time of year are cucumber beetles, squash vine borer, and squash bugs. Flea beetles can be a problem on eggplants and many other plants.
|
Squash Bug
Squash bug (Hemiptera) on yellow squash (Cucurbita)
|
Flea Beetles
Flea beetle damage (Coleoptera) to leaves of eggplant (Solanum melongena)
|
|
The mimosa webworm may cause damage to mimosa and honeylocust trees.
|
|
|
|
|
Apply controls for apple maggot now.
|
|
|
|
|
Watch for clematis wilt, vinca stem blight, and peony blotch.
|
|
|
|
|
© Missouri Botanical
Garden, 2001-2009
|
