Insects that affect roses are often considered pests. Cultivation requirements of individual rose species and cultivars, when observed, often assist in the prevention of pests, diseases and disorders. Some varieties of roses are naturally more resistant or immune than others to certain pests and diseases. Many of the problems affecting roses are seasonal and climatic. ![]() Roses ( Rosa species) are susceptible to a number of pests, diseases and disorders. As with all pesticides, be sure to read all product labeling carefully before use.Rose aphid ( Macrosiphum rosae) feeding on buds and shoots Rose rust ( Phragmidium) Two-spotted mite ( Tetranychus urticae) on Gardenia Yellow tea thrips ( Scirtothrips dorsalis) Bristly roseslug ( Cladius difformis) on the underside of a leaf Cottony cushion scale ( Icerya purchasi) Leaf damage caused by a leafcutting bee ( Megachile sp.) Root-knot nematode ( Meloidogyne sp.) nodule damage to roots Flea beetle ( Aphthona flava).Holes should also not be drilled in more than two consecutive years. Holes should not be drilled in a tree more than once a year. Even though Multi-Insect Killer Tree Injection calls for very small holes to be drilled, all holes are wounds. ![]() ![]() Injections to conifers may be either slow in uptake or have no uptake at all.This treatment should NOT be applied to food-bearing plants.Treatments are more effective early in the growing season.Adelgid (such as Hemlock Woolly Adelgid).One Multi-Insect Killer Tree Injection Kit contains enough insecticide for 15 application sites and can treat from fifteen 4" circumference trees to one 60" tree. Inject prescribed amount of insecticide into each hole. Evenly space holes around the tree every 4-6 inches. Measure the circumference of the tree within 12 inches of the ground.ĭrill 1/2-inch-deep holes into the tree at the flare of the roots. Use the syringe to deposit insecticide into holes drilled around the base of the tree. The active ingredient is Merit ® (Imidacloprid). To kill insects already on a tree, apply in spring through fall more than one application may be needed depending on the infestation. As a preventative, apply in early spring prior to insect activity in the tree one application provides full-season control. Treatments earlier in the growing season are more successful. Treat trees anytime during the growing season. ![]() Also, damage to the tree is minimized due to the needle-like design of the ampules. This simple application method is both easy and convenient. Multi-Insect Killer contains an insecticide that is deposited into holes drilled into the tree trunk at the root flares (where the trunk begins to 'flare out' at ground level). In general, one application gives season-long control and control of pests can start to be seen within two weeks. Controls Adelgids (including Hemlock Woolly Adelgids), Aphids, Asiatic Garden Beetles, Black Vine Weevil Larvae, Chafers, Elm Leaf Beetles, Eucalyptus Longhorned Beetles, flathead borers (such as Alder-Birch Borers, Bronze Birch Borers and Emerald Ash Borers), Japanese beetles, Lacebugs, Leafhoppers, Leafminers, Mealybugs, Oriental Beetles, Psyllids, Royal Palm Bugs, Soft Scale Insects, Thrips (suppression) and Whiteflies on all types of ornamental trees. It is especially useful in situations where foliar spraying is not feasible. Multi-Insect Killer Tree Injection Kit (formerly Pointer) is designed to allow homeowners to effectively treat trees of any size with systemic insecticide. Treats 1 large tree (60" in circumference) or numerous smaller trees. (15mL) vial of injectible insecticide, one syringe and one syringe tip.
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