Agent Answers: A few good ways to eliminate Japanese beetles
-- Jake P., Athens
Japanese beetles are rather frustrating pests that consume a variety of ornamental plants, flowers and fruits including crape myrtle, roses, Japanese maples, many fruit trees, grapes, hollyhock, sassafras and more. Japanese beetles are approximately 1 centimeter in length and brown with a green metallic tint. These beetles have clusters of white "hairs" protruding from under the sides of their upper wings.
Japanese beetles can defoliate host plants, but rarely kill established plants. Most gardeners control these insects by hand, picking and placing the beetles in a cup of soapy water. The insects cannot escape and drown in the water. Other gardeners place a bucket of soapy water under an infested plant and shake the branches so large numbers of the insects fall into the bucket. Both methods are best when done in the early morning when the insects are sluggish and less likely to fly when disturbed. These methods often are good controls, since the beetles release pheromones, which in turn attract other beetles. If you can keep populations as low as possible, fewer insects will be drawn to your garden.
There also are traps for Japanese beetles that utilize pheromones and a food scent to attract beetles. While these traps are effective, beetles often are attracted by the hundreds, and not all enter the trap. Any susceptible plants in the path of the beetles or in the vicinity of the trap could be defoliated. If you still would like to use these traps, place them away from any beloved plants.
Chemical controls include both organic (Neem or pyrethrin) and inorganic (imidacloprid or carbaryl) options. Insecticidal soaps are not effective for Japanese beetle control. Follow label directions for any chemical controls used.
• Send your agricultural or natural resources questions to Amanda Tedrow, Athens-Clarke County Extension agent, at atedrow@uga.edu or call (706) 613-3640.
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Ways To Kill Japanese Beetles - News
These beetles have clusters of white "hairs" protruding from under the sides of their upper wings. Japanese beetles can defoliate host plants, but rarely kill established plants. Most gardeners control these insects by hand, picking and placing the
We are having an invasion of Japanese beetles. They are eating the leaves off the trees. The newspapers are coming so tightly rolled up that it's like trying to unfurl a party favor. It very difficult. It's taking the fun out of the paper.
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Japanese Beetles are a pest that were accidentally introduced to the eastern U.S. in the early 1900′s. Now they are sprouting up everywhere including in Minnesota. This year in the twin cities metro area they are as bad as they’ve ever been and they are devouring everything in their path. Japanese Beetles cause damage in multiple ways.
GRUBS- Grubs are present in your lawn during spring and early summer from eggs that were laid and hatched the previous fall. The grubs devour roots of plants (including: trees, grass, plants, flowers and ornamental shrubs). They cause stress on your lawn by not allowing roots to establish causing large patches of grass to die in the heat of summer. Pull up the dead turf and roll it up until you reach the edge of the green. If it is grubs you will find them here at the edge of the green turf eating away at the roots. Another issue that may arise out of having these grubs in your turf is the fact that other pests eat these grubs. Grubs in your turf will attract moles, shrews, and even skunks that all feed on the larva.
ADULT JAPANESE BEETLE -From about the beginning June through the end of August they mature into the beetle and they emerge hungry. They attack plants of all kinds but they seem to like roses, ornamental shrubs, and fruit trees. The beetle emits a pheromone that attracts other beetles to the spot resulting in an infestation on a single tree or garden.
They retreat to the grass in the evening to lay eggs in your lawn/garden. The eggs will hatch in the late summer and the larva will immediately begin the cycle again feeding on roots before winter arrives.
TREATMENT - There are a number of products out on the market that will help control Japanese Beetles. You can attack them in a few different ways. The first is to use a systemic treatment for your trees and shrubs. Infuse by Bonide is a systemic treatment for trees that will help protect them from a number of different insects including Japanese Beetles and Emerald Ash Borer. To kill grubs it’s best to apply a granular insecticide with a spreader from July-September. At this point in the grubs life-cycle they are weak and can be killed off easily.
To kill adult Japanese beetles proves to be a little more difficult. Removing the Japanese Beetles as soon as they are present is key due to the fact that having beetles present attracts more beetles. Use a spray insecticide and thoroughly treat the infested area. ou may need more than one treatment to completely kill off an invasion. Be careful to use an approved insecticide when treating a fruit producing plant and follow the instructions on the bottle.
Ways To Kill Japanese Beetles - Bookshelf
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