| Rutabaga and Turnip - Insect Control |
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Insect ControlNonchemical control: Flea beetles, leafminers and the cabbage maggot can be controlled in spring crops with spunbonded row covers. Cover at seeding and seal the edges with soil to exclude the cabbage maggot fly, which lays eggs at the base of the young turnip or rutabaga seedlings. Rotate fields so that flies do not emerge under row covers. Row covers are most effective for spring crops. Row cover used to protect fall turnips and rutabegas from cabbage maggot during August and early September may cause reduced yield and root quality. Aphids are generally kept below damaging levels by natural enemies. If using row cover, do not place over crops with aphids present as the cover will exclude natural enemies and cause outbreaks of aphids under the cover. NOTE: For the insecticides listed below, one product trade name and formulation is provided for each active ingredient (common name) as an example of rates, days to harvest (dh), REI, and special instructions. In many cases there are other products available with the same active ingredient. Please see Table 20 and Alphabetical Listing by Trade Name for more information on products with the same active ingredients. Aphids and LeafminersLeafminers generally are controlled by natural enemies unless disrupted by broad-spectrum insecticide applications. Some species may be transported on transplants from southern or western locations. Control broadleaf weeds in and around the planting. Rotate insecticide groups to slow resistance. Systemic insecticides may control larvae within leaves. See Cabbage Section for more information. dimethoate (Dimethoate 4EC): 8 oz/A (14 dh, REI 48h, Group 1B). For turnip greens and roots only. permethrin (Pounce* 25WP): 3.2 to 9.6 oz/A (1 dh, REI 12h, Group 3A). Turnip only. pymetrozine (Fulfill): 2.75 oz/A (7 dh, REI 12h, Group 9A). For aphids on turnip greens only. spinetoram (Radiant SC): 6 to 10 oz/A (1 dh, REI 4h, Group 5). For leafminers only. Efficacy improves with the addition of an adjuvant. spinosad (Entrust): 1.25 to 3 dry oz/A (1 dh, REI 4h, Group 5). For leafminers on turnip greens only. Efficacy improves with the addition of an adjuvant. OMRI listed. Cabbage MaggotSee Cabbage Section for more information on cabbage maggot. Both spring and fall crops are susceptible to maggot damage. Cooler soils in early fall allow survival of eggs from late season maggot fly. Use drop nozzles directed to base of plant. Use at least 100 gal water/A. |
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