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White Grub Management in Ornamental Plantings
Management of infestations of white grub larvae (such as Japanese beetle larvae, chafers, Phyllophaga spp., Asiatic garden beetle, oriental beetle) may be achieved by applying registered formulations of imidacloprid (Merit 0.5 G, Merit 2, Merit 75 WP, and Merit 75 WSP) made according to label directions. These products are for use only in and around industrial and commercial buildings and residential areas.
White grubs may also be managed in ornamentals (preplant incorporation treatment of field-grown nursery stock) with Dursban 50W insecticide. Dursban 50W is to be applied to soil and incorporate before transplanting or planting to control white grubs during transplant or seedling establishment.
Chlorpyrifos Pro 4 is labeled to treat potted, containerized, or balled and burlapped nursery stock in ornamental nurseries to control white grubs attached to the roots of these plants.
Discus Nursery Insecticide (supplemental label) can be used for the control of soil-inhabiting pests of grassy areas of nurseries, such as northern and southern masked chafers, Cyclocephala borealis, C. immaculata, and/or C. lurida; Asiatic garden beetle, Maladera castanea; European chafer, Rhizotrogus majalis; green June beetle, Cotinis nitida; May or June beetle, Phyllophaga spp.; Japanese beetle, Popillia japonica; oriental beetle, Anomala orientalis; billbugs, Spherophorus spp.; black turfgrass ataenius, Ataenius spretulus and Aphodius spp. and mole crickets, Scapteriscus spp. Discus Nursery Insecticide can also be used for suppression of cutworms. Discus Nursery Insecticide can be used as directed on nursery grass in sites such as under or around field- or container-grown plants, on roadways, or on other grassy areas in or around nurseries. Discus Nursery Insecticide cannot be used on commercial sod farms.
Flagship 25WG is recommended for application to soil or other growing media of ornamental plants grown in greenhouses, lath and shadehouses, containers, field nurseries (including nonbearing fruit and nut trees), and as Christmas trees. Flagship 25WG is labeled for larvae of Japanese beetle, Popillia japonica; northern masked chafer, southern masked chafer, European chafer, Rhizotrogus majalis; May or June beetle, Maladera castanea; oriental beetle, Exomala orientalis; and green June beetle, black turfgrass ataenius, Aphodius spp.