Japanese Beetle Damage

Japanese beetle damage

Japanese beetles have been particularly nasty this summer.  Certain areas of SE Wisconsin have been hit really hard causing many trees to look ragged and tattered.  Japanese beetle adults are slightly less than 1∕2 inch long, and are shiny, metallic green.

Plants Attacked and Damage: Japanese beetle adults do not damage turf, but are an important pest of many other plants. They feed on foliage or flowers, and are a major pest of over 300 species of plants, including fruits, vegetables, ornamentals, field and forage crops, and weeds. Norway and Japanese maple, birch, crabapple, purple-leaf plum, rose, mountain ash, and linden are highly preferred ornamental hosts. Adults feed on the upper surface of the foliage of most plants, consuming soft tissues (mesophyll) between the veins, and leaving a lace-like skeleton. Often the upper canopy is defoliated first or most severely. Trees with extensive feeding damage turn brown and become partially defoliated.

 

Japanese Beetle Damage
Japanese Beetle Damage (causes a lacy look to the leaf)

Japanese beetle grubs feed below ground and chew on the roots of turf and ornamentals. As a result, they reduce a plant's ability to take up enough water and nutrients to withstand stresses of hot, dry weather. The first evidence of grub injury in turf is the development of localized-patches of pale, dying grass that displays symptoms of drought stress. As grubs develop further and feeding increases, damaged areas rapidly enlarge and coalesce (merge) to a point where the turf is not well-anchored and can be rolled back like carpet.

 

Control for japanese beetle can be performed thru a variety of different methods.  Depending upon the timing of the year and the severity of the problem Hoppe Tree Service can provide either quick acting foliar sprays or longer lasting soil insecticide treatments to combat this troublesome Asiatic invader.

 

 
 
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