BLACK VINE WEEVIL

DAMAGE

Crescent-shaped notches along leaf margin mostly occuring on Yew (Taxus), Hemlock (Tsuga) and Rhododendrons.

TIMING

June-July

CONTROL METHOD(S)

Bonide Systemic Insect Control
Use June 10th, 20th, 30th, foliar spray, preventative & curative

Bayer Systemic Tree & Shrub Insect Control
Use June 10th, 20th, 30th; foliar spray; preventative & curative

BRONZE BIRCH BORER

DAMAGE

Top of the tree suddenly dies and wilts; gouting of the branches; D-shaped holes found in bark most commonly on Birch (Betula)

TIMING

May-June

CONTROL METHOD(S)

Bonide’s Captain Jacks Deadbug Brew 
Use May 1, 15 & 30; Soil drench, spray lower 4-5′ of trunk, preventative

Bayer Systemic Tree & Shrub Insect Control 
Use April 1, soil drench, spray lower 4-5′ of trunk, preventative

DOGWOOD BORER

DAMAGE

Damaged area of trunk/branch swells and bark falls off; leaves turn red prematurely in mid-summer on lone branches; infested branch dies mainly on Dogwood (Cornus)

TIMING

May-June

CONTROL METHOD(S)

Bonide’s Captain Jack’s Deadbug Brew –
Apply May 1st, May 15th & May 30th, spray lower trunk and branches, preventative

Bayer Tree & Shrub Systemic Insect Control –
Apply April 1st, soil drench and lower trunk and branches, preventative

RHODODENDRON BORER

DAMAGE

Appears to be drought stress – foliage loses color and dies, entry holes close to ground

TIMING

May-June

CONTROL METHOD(S)

Bonide’s Captain Jack’s Deadbug Brew –
Apply May 1st, May 15th & May 30th, spray lower trunk and branches, preventative

PINE TIP SHOOT MOTH

DAMAGE

Web spun on current years growth; yellow/brown needles, dead top of tree usually on Pine species

TIMING

June

CONTROL METHOD(S)

Bayer Systemic Tree & Shrub Insect Control
Apply April 1st for trees 1-15′ tall or apply October 15th for plants over 15′ tall for control for the next season, preventative

CATERPILLARS

DAMAGE

Defoliation of trees and shrubs occuring on numerous plant species

TIMING

May-June

CONTROL METHOD(S)

Bonide’s Captain Jack’s Deadbug Brew
Use in 10-14 day intervals, spray entire plant, curative

GYPSY MOTH

DAMAGE

Defoliation of trees and shrubs on many tree species in Ohio.

TIMING

June

CONTROL METHOD(S)

Bonide’s Captain Jack’s Deadbug Brew
Use late April or early May in 10-14 day intervals, spray underneath leaves, curative

SAWFLY

DAMAGE

Needles wilt, turn brown and appear somewhat straw-like, surface of needle is eaten or entire needle is eaten.  Mainly occurs on Mugo Pines.

TIMING

May-June

CONTROL METHOD(S)

Malathion, Sevin or Eight
3 sprays at 7-10 day intervals, spray entire plant, curative

 

MAGNOLIA SCALE

DAMAGE

Branch usually totally encrusted in scales; branch dies; under-developed leaves mainly on Magnolia species

TIMING

May-August

CONTROL METHOD(S)

Dormant Oil or Bayer Tree & Shrub Systemic Insect Control 
Apply late March to entire trunk and branches, preventative

Alternate sprays of All Seasons Spray Oil & Eight
6 total sprays at 7-10 day intervals, spray entire trunk and branches, curative, product is most effective while scale is in crawler stage

Bonide Systemic Insect Control 
6 total sprays at 7-10 day intervals, spray entire trunk and branches, curative, product is most effective while scale is in crawler stage

 

PINE NEEDLE SCALE

DAMAGE

Yellow needles.  From a distance trees appear frosted or silvery.  Twigs and branches may die mainly on conifers.

TIMING

May-July

CONTROL METHOD(S)

Dormant Oil or Bayer Systemic Tree & Shrub
Apply late March to entire plant, preventative

Alternate Sprays of All Seasons Oil & Eight
Apply 6 total sprays at 7-10 day intervals, spray entire trunk and branches, curative

EUONYMUS SCALE

DAMAGE

Branch usually totally encrusted in scales, branch may die or under-developed leaves on Euonymus plants.

TIMING

May-July

CONTROL METHOD(S)

Dormant Oil
Apply late March to entire plant, preventative

Alternate Sprays of All Seasons Oil & Eight
Apply 6 total sprays at 7-10 day intervals, spray entire trunk and branches, curative, most effective while scale is in crawler stage

MITES

DAMAGE

Tiny yellow or white speckles on leaf; foliage takes on a yellow or bronzed cast; foliage drops prematurely on numerous plant species.

TIMING

All Summer

CONTROL METHOD(S)

Disease & Mite Control or Bonide Systemic Insect Control or Neem Oil or Bonide Rose Shield or Bonide Fruit Tree & Plant Guard
Spray in 7-10 day intervals, apply spray when blooms fade and again in 10 days, spray underneath leaves, curative

LACE BUGS

DAMAGE

Yellow or whitish spots on upper leaf surface; totally yellow leaves; early leaf drop; dark spots underneath leaf most commonly on Azalea, Pieris, Rhododendron and Mountain Laurels.

TIMING

All Summer

CONTROL METHOD(S)

Bonide Systemic Insect Control or Neem Oil or Bonide Rose Shield or Bonide Fruit Tree & Plant Guard
Spray 7-10 day intervals after flowers fade, spray underneath leaves, curative.  Do NOT apply while plants are in bloom.

THRIPS

DAMAGE

Leaves will turn brown and curl; defoliation on numerous plant species, especially annuals and tropicals

TIMING

All Summer

CONTROL METHOD(S)

Eight
Spray in 10-14 day intervals, spray entire plant, curative

Bonide’s Captain Jack’s Deadbug Brew
Spray in 5-7 day intervals, spray entire plant, curative

APHIDS

DAMAGE

Distorted leaves and stems, plants covered in honeydew or black sooty mold on numberous plant species

TIMING

May-August

CONTROL METHOD(S)

Eight or Neem Oil
Spray in 10 day intervals, spray entire plant, curative

Bayer Systemic Tree & Shrub Insect Control 
Spray late April and late June, soil application, preventative

LEAF MINER

DAMAGE

Upper and lower layer of leaves are eaten; tree looks dead with wilted brown leaves most commonly on Birch, Holly and Inkberry plants

TIMING

June-July

CONTROL METHOD(S)

Bayer Systemic Tree & Shrub Insect Control
Apply in June, foliar spray, curative

ROSE MIDGE

DAMAGE

Bent or misshapen buds and withering stem tips; buds and growing shoots turn brown and finally black typically on rose plants

TIMING

July

CONTROL METHOD(S)

Bonide Systemic Insect Control
Apply at 10-14 day intervals, foliar spray, curative

BAG WORM

DAMAGE

Defoliation of trees and shrubs; brown foliage; foliage loss; “sacks” visible with caterpillars inside on numerous plant species, especiallly Arborvitaes

TIMING

July-August

CONTROL METHOD(S)

Bonide Systemic Insect Control or Bonide’s Captain Jacks Deadbug Brew 
Apply 3 sprays 10-14 days apart beginning late April and early May, foliar spray, curative

 

JAPANESE BEETLES

DAMAGE

Skeletonized leaves; beetles present on numerous plant species, especially Roses & Prunus species

TIMING

Late June to July

CONTROL METHOD(S)

Bonide Systemic Insect Control or Bonide Rose Shield or Bonide FruitTree & Plant Guard
Apply in 7-10 day intervals, spray entire plant, curative

 

GRUBS

DAMAGE

Appears first as drought stress; dead grass in irregular patches; grubs present when turf is rolled back on lawn turf

TIMING

Noticed in the fall

CONTROL METHOD(S)

Scott’s Grub-Ex
Apply June 15th to August 15th, apply to entire lawn, preventative

Bayer’s 24-Hour Grub Killer 
Apply in September or early spring, apply to entire lawn, curative

More information

FLEAS

DAMAGE

Present on pets or in home

TIMING

Summer

CONTROL METHOD(S)

Powerforce Multi-Insect Killer or Hi-Yield Turf Ranger
Can use all summer, apply to entire lawn, curative

CHINCH BUGS

DAMAGE

Irregular patches of turf begin to turn yellow and straw-colored; patches continue to become larger in spite of watering in the lawn

TIMING

June-July

CONTROL METHOD(S)

Ortho Bug-B-Gon Max or Hi-Yield Turf Ranger
Use anytime during summer, apply to entire lawn, curative

SOD WEBWORM

DAMAGE

Often mistaken for heat and drought stress; small dead patches of grass among normally growing grass; turf thinning in the lawn

TIMING

June-July

CONTROL METHOD(S)

Hi-Yield Turf Ranger
Apply anytime in summer, apply to entire lawn, curative

SLUGS

DAMAGE

Chewed leaves, mainly on Hosta plants

TIMING

April-June

CONTROL METHOD(S)

Sluggo 
Apply during wet periods, curative

ANTS

DAMAGE

Present around the home or garden

TIMING

All Year

CONTROL METHOD(S)

Eight or Fertilome Broad Spectrum Insect Control or Powerforce Multi-Insect Killer
Use May through September, apply around home perimeter, preventative and curative

ROSE SLUG

DAMAGE

Translucent/skeletonized leaf tissue, leaves turn brown, large holes may develop occuring mainly on rose plants

TIMING

May-June

CONTROL METHOD(S)

Hand Picking
If only a few are seen, they can be picked off by hand then disposed of.  Dispose of infested leaves.

Eight or Bonide’s Rose Shield
Apply when damage is noticed or, if usually present, apply as a preventative.