When dry soil conditions exist, watering before treatment causes grubs to move nearer the soil surface. Water thoroughly again after treatment is applied. Milky spore bacteria at best work only on Japanese beetle grubs to suppress populations over time. Insecticide control of Japanese beetle adults is difficult because of their mobility. Hand collecting beetles may not be the most effective method of control but can be used in areas where beetles are less numerous.
Japanese beetles are pests in parts of northern and east central Alabama.
Japanese beetle adult flights peak most years in June. Japanese beetle traps in home landscapes may do more harm than good. Beetle presence on plants attracts more beetles. Beetles that are attracted into the area may not make it to traps. Planting less susceptible plants, such as boxwood, dogwood, holly, or lilac, may be an alternative.