Japanese Beetles were first identified around the turn of the century as being a problem pest in the United States. They probably arrived in our country by being transported in the root system of some plant. Once planted in our soil, this pest quickly took advantage of the luscious plants, shrubs and trees gardeners and homeowners like to grow.
JAPANESE BEETLE BIOLOGY
Today, this beetle emerges in early summer and will eat just about anything we like to grow around the home. The end result will hurt the tree or plant they are feeding on and may lead to it’s death if left untreated. This article will provide some basic information about Japanese Beetles and then explain the best methods and materials to use for controlling them. Since these pests are stubborn and persistent, we will present the quickest and most acute methods for control.
Japanese beetles live around one year. Eggs hatch in the fall, feed before winter and then overwinter by going deep into the soil below the frost line. In the spring, they will come back up to the top of the soil, pupate to adults and then emerge as the flying pest we all love to hate. Initially, the adults will seek just about any plant on which to feed. They love roses, birch trees, purple plums, crepe myrtle’s, dogwoods and cherry trees. However, no plant with succulent leaves is safe. This feeding will lead to massive destruction of leaves within a short period of time. The loss of leaves can be devastating to certain plants making them more vulnerable to fungus and drought. It is important to identify which plants the beetles prefer on your property and then make an effort to minimize the loss these plants suffer during the feeding time. Japanese beetles will feed for several weeks. After they have their full, they will mate and lay eggs. Females will lay 50-100 eggs in the grass and turf around your home. These eggs will emerge in late summer to early fall and begin the cycle again.
JAPANESE BEETLE YARD SPRAY
So when Japanese Beetles are active, its important to spray the plants where they are nesting and mating. Our PROTHOR is best as a foliage spray and systemic providing several months of protection when applied quarterly throughout the year.
As a surface spray, it will kill them within 1- 2 days and since its non repelling, they won’t know anything there can harm them. This stealthiness will lead to their quick demise.
ORGANIC GARDEN SPRAY FOR JAPANESE BEETLES
A stronger organic option we like is MULTI PURPOSE INSECT KILLER. It seems to work the best on hard shelled insects like Japanese Beetles. Both Soap and Multipurpose Insect Killer are certified by NOP and approved for use for organic gardening so you can use them with confidence. Most importantly, they really do work well. The only drawback with the organic products is that they won’t provide a long term residual so expect to use the Soap several times as week in extreme cases; the Multi Purpose spray less often since it seems to last longer.
Organic Insect Killer: https://bugspray.com/organic/liquid/multi-purpose-insect-killer-24-oz
JAPANESE BEETLE GRUB LAWN GRANULES
The third priority deals with stopping the cycle. This is done by using a grub control product in the fall. One of the best is a product called MERIT. It is both easy to apply and lasts a long time. Apply it with one of our GRANULE SPREADERS to get equal coverage around the yard. Remember, the grubs will be feeding through late fall and as the ground frosts they will simply move deep. Merit will penetrate the soil, kill active adults before they move deep and then stay in the soil throughout the winter. The following spring the Merit will still be active when adults rise back up. Though the product is designed to last for the whole year, you will get much better results if you treat in the fall and then again in the spring. This insures you won’t have any break in the residual due to excessive water or other weather conditions.
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