Insect Control

NOTES:  For the insecticides listed below, one product trade name and formulation is provided for each active ingredient (AI) as an example of rates, days to harvest (dh), restricted entry interval (REI), and special instructions. In many cases, there are other products available with the same AI. Please see Table 27 and Insecticides Alphabetical Listing by Trade Name for more information on these insecticides.

The designation (Bee: L, M, or H) indicates a bee toxicity rating of low, moderate, or high. See the Protecting Honeybees and Native Pollinators section for more details.

The symbol * indicates a product is a restricted use pesticide. See Pesticide Safety and Use for more details.

The symbol OG   indicates a product is listed by the Organic Materials Review Institute (OMRI) as approved for use in organic production. See Organic Certification section for more details.

Cabbage Maggot (Delia radicum)

The cabbage maggot can be controlled 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 young radish seedlings. Do not plant into land that was planted to a cole crop the previous year as this pest overwinters as pupae in soils where larvae infested plants.

See the Cabbage section for more information about cabbage maggot and for more on cultural controls.

chlorpyrifos (Lorsban 4E): Pre-plant: 5.5 pint/A ; At or post-plant: 1 oz/1000 row ft (30 dh, REI 24h, Bee: H, Group 1B). Apply pre-plant as a broadcast spray and incorporate same day into top 2 to 4" of soil, or apply as a water-based drench in seed furrows with the seed at planting in a minimum of 40 gal/A total drench.

cyantraniliprole (Verimark):  10 to 13.5  oz/A (0 dh, REI 4h, Bee: H, Group 28). For soil applications at planting. Supplemental label.

Cutworms

See cutworms in the Pepper and Tomato (Outdoor) sections for more information on the black and variegated cutworms.

alpha-cypermethrin (Fastac* EC): 1.3 to 3.8 oz/A (1 dh, REI 12h, Bee: H, Group 3A).

Bacillus thuringiensis aizawai (XenTariOG): 0.5 to 1.5 lb/A (0 dh, REI 4h, Bee: L, Group 11). Must be ingested; apply in evening or early morning, before larvae are actively feeding. Adherence and weather-fastness will improve with use of an approved spreader-sticker. Use high rate at cool temperatures. For resistance management, may be rotated with Bt kurstaki products (Dipel).

Bacillus thuringiensis kurstaki (Dipel DFOG): 0.5 to 2 lb/A (0 dh, REI 4h, Bee: L, Group 11). Must be ingested; apply in evening or early morning, before larvae are actively feeding. Adherence and weather-fastness will improve with use of an approved spreader-sticker. Use high rate at cool temperatures. For resistance management, may be rotated with Bt aizawai products (XenTari).

beta-cyfluthrin (Baythroid* XL): 1.6 to 2.8 oz/A (0 dh, REI 12h, Bee: H, Group 3A).

bifenthrin (Brigade* 2EC): 5.1 to 6.4 oz/A (21 dh, REI 12h, Bee: H, Group 3A). Apply as foliar spray.

carbaryl (10% Sevin Granules): 20 lb/A (7dh, REI 12h, Bee: H, Group 1A). Apply evenly over soil surface.

deltamethrin (Delta Gold*): 1 to 2.4 oz/A (3 dh, REI 12h, Bee: H, Group 3A).

methoxyfenozide (Intrepid 2F): 8 to 16 oz/A (14 dh, REI 4h, Bee:L, Group 18). Suppression only.

spinosad (SeduceOG): 20 to 44 lb/A or 0.5 to1 lb/1000 sq ft. (3 dh, REI 4h, Bee: M, Group 5). Spread bait on soil around plants.

Flea Beetle, Crucifer (Phyllotreta cruciferae) and Striped (P. striolata)

See the Cabbage section for more details on flea beetles that attack brassica crops.

Nonchemical control: Row covers provide protection. See Cabbage Maggot section, above, and Slitted and Floating Row Covers section.

alpha-cypermethrin (Fastac* EC): 1.8 to 3.8 oz/A (1 dh, REI 12h, Bee: H, Group 3A).

beta-cyfluthrin (Baythroid* XL): 1.6 to 2.8 oz/A (0 dh, REI 12h, Bee: H, Group 3A).

bifenthrin (Brigade* 2EC): 5.1 to 6.4 oz/A (21 dh, REI 12h, Bee: H, Group 3A). Apply as foliar spray.

carbaryl (Sevin XLR Plus): 0.5 to 1 qt/A (7 dh, REI 12h, Bee: H, Group 1A).

deltamethrin (Delta Gold*): 1.5 to 2.4 oz/A (3 dh, REI 12h, Bee: H, Group 3A).

esfenvalerate (Asana* XL): 5.8 to 9.6 oz/A (7 dh, REI 12h, Bee: H, Group 3A).

imidacloprid (Admire Pro): 4.4 to 10.5 (21 dh soil, REI 12h, Bee: H, Group 4A). For soil applications only.

kaolin (Surround WPOG): 25 to 50 lb/A or 0.25 to 0.5 lb/gal (0 dh, REI 4h, Bee: L). Suppression/repellence only. Generally compatible as a tank mix with other insecticides.

petroleum oil (Suffoil XOG): 1 to 2 gal/100 gal water (0 dh, REI 4h, Bee: L). Apply as needed. For beetle larvae only.

pyrethrin (PyGanic EC5.0OG): 4.5 to 17 oz/A; 0.25 to 0.50 oz/gal, 3 gal/1000 sq ft in greenhouse for backpack sprayers (0 dh, REI 12h, Bee: M, Group 3A).

spinetoram (Radiant SC): 6 to 8 oz/A (3 dh, REI 4h, Bee: M, Group 5). Suppression only.

spinosad (Entrust SCOG): 3 to 6 oz/A (3 dh, REI 4h, Bee: M, Group 5).

thiamethoxam (Actara): 1.5 to 3 oz/A (7 dh, REI 12h, Bee: H, Group 4A).

thiamethoxam (Platinum): 5 to 6.5 oz/A (REI 12h, Bee: H, Group 4A). Use at seeding or within 24 hours of seeding as an in-furrow or narrow surface band with sufficient water for incorporation, or in drip irrigation.