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Milky spore japanese beetles12/5/2023 ![]() Spraying and killing the adult beetles prior to them laying their eggs to start the cycle all over again is of great importance as well. Even if your rose beds are heavily under attack, the milky spore seems worth a try. Killing the grubs that eat the milky spore slows up or stops the spread of the milky spore and, thus, can negate its impact upon the beetles you are trying to gain control over. If going this route, it is extremely important to use an insecticide to kill the adult beetles that will not kill the grubs as well. This method can take three to four years to spread enough through the garden areas, depending upon the size of the garden, to make the impact desired on these bullies. Upon killing the grubs, even more of the milky spore is generated, thus helping to kill even more grubs. This spore is eaten by the Japanese Beetle Grubs and has a bacterium that kills the grubs. At the very first signs of any Japanese beetles entering your area, not even necessarily your rose beds or gardens, buy a product called Milky Spore. I have read about various methods to try to control and be rid of them from covering all the roses with a tight woven mesh netting to hanging Bounce dryer sheets in the rose bushes.Īfter all the reading I have done about Japanese beetles and rose damage, it appears that one of the best ways to attack them is a two pronged approach. How to Get Rid of Japanese Beetles on Roses ![]() Let’s look at some ways on how to control Japanese beetles on roses. A beautiful rose bed one day can be turned into a field of tears in just moments by an attack of these garden bullies. I try to discourage people from this practice because traps with pheromone lures will bring beetles in from five miles away, meaning that you have more beetles.There is nothing more frustrating to the rose loving gardener than this nasty pest from the land of the rising sun known as the Japanese beetle. Some people will use traps to kill Japanese beetles. Using milky spore to kill the grubs doesn’t mean that you won’t have any Japanese beetles the following year, but you can significantly reduce the population that is present in your area. It only works on grubs, so applying it while the beetles are out eating leaves won’t kill any Japanese beetles. The grubs must ingest the milky spore for it to be work. Soil temperatures need to be over 65 for milky spore to be effective. The third time to control Japanese beetles would be in the spring with another milky spore application. September is the optimal time to make a milky spore application. It’s a bacteria that feeds on Japanese beetle grubs after they ingest it. Milky spore is an organic product that can be used to kill grubs in the ground. Even as grubs they can do damage to turf by feeding on the roots. By that time of year all the Japanese beetles are grubs living in the soil. The second time to control Japanese beetles is in September. Knock Japanese beetles off plants into the cup and they will drown. If you don’t have a heavy infestation you can also use a cup with soapy water in it. You can use carbaryl, which is the active ingredient in Sevin to control adults. The most obvious is when they are adults and are out feeding on leaves. There are three times a year that are most ideal for controlling Japanese beetles. After hatching, the beetles live in the soil until they come back out as adults in May. The females will lay eggs for most of their adult life. Usually the adults, which are the beetles that we see flying around eating leaves, will begin to appear in May – June. Thankfully, Japanese beetles only have a single generation each year. ![]() They’ll eat everything between the leaf vein, but leave the veins. The damage that you see from them looks like skeletonizing of the leaves. Japanese beetles also have a row of five white dots along the side of the abdomen that can be used to differentiate them from other beetles. June beetles are typically about 1.5 to twice as large as Japanese beetles. They have a metallic green color on their abdomen. Feeding on such a wide range of plants means that your yard may look like an all you can eat buffet to them. They will feed on a wide range of ornamentals, fruit trees, vegetables, and shade trees. They have spread to much of the East coast and across the Mississippi River. ![]() Let’s talk about some strategies for lessening their impact. Controlling them can be challenging because they are such voracious eaters. They are a huge pest as they munch their way through your yard. ![]() They are in west Georgia and will begin emerging here soon. The Japanese beetles will soon be out in full force. ![]()
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