Table 1.3-2. Products registered for insect control in on-farm stored grain
| Treatment site | Insecticide | Amount to Use¹ | Comments |
|---|---|---|---|
| Fumigation |
Aluminum phosphide |
Seek professional assistance |
Restricted-use pesticide-extremely toxic and potentially explosived. Strict application procedures are required. |
| ¹Be sure to read labels to confirm details. ²Storcide II replaced Storcide and Reldan 4E. Use of Reidan 4E is illegal. |
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| Residual spray on floor and sides of storage facility | Beta-cyfluthrin (Tempo SC Ultra) | 0.27–0.54 fl oz per 1 gal water | For general surface spot, mist, or crack and crevice application. Use higher rate for longer residual. Avoid contact with treated surfaces until dry. Some reports say that this product may not protect fully against weevils. |
| Chloropyrifos-methyl and deltamethrin (Storicide II²) | 1.8 fl oz per 1 gal water | Clear bins thoroughly before use. Apply only to empty grain bins using automated spray equipment. Use a downward spray from outside the bin. Apply finished spray mixture to equipment, walls, and floor surfaces at 1 gal per 1,000 sq ft prior to storing or handling grain. | |
| Deltamethrin (Suspend SC) | 0.25–1.25 fl oz per 1 gal water | Clear bins thoroughly before use. Apply finished spray mixture to equipment, walls, and floor surfaces of grain bins at 1 gal per 1,000 sq ft prior to storing or handling grain. Do not allow runoff to occur. |
|
| Malathion | Many trade names are sold; check rates | Many stored grain insect pest species are resistant to malathion. | |
| Pyrethrins + piperonyl butoxide | Several trade names are sold; check rates | Barley, corn, oats, rye, and wheat. | |
| Spinosad (Contain) |
5.9-10.5 fl oz per 1,000 bushels depending on commodity |
Barley, oats, sorghum, triticale, and wheat. Some formulations are approved for organic use. |
|
| Grain protectants | Chloropyrifos-methyl and deltamethrin (Storicide II²) | Barley: 9.9 oz per 1,000 bushels | Dilute the labeled rate in 5 gal of water. The final spray is 5 gal liquid per 1,000 bushels. See oil manufacturers’ rates for oil solutions. |
| Oats: 6.6 oz per 1,000 bushels | |||
| Sorghum: 11.6 oz per 1,000 bushels | |||
| Wheat 12.4 oz per 1,000 bushels | |||
| Pirimiphos-methyl (Actellic 5E) | 9.2–12.3 oz per 5 gal water per 30 tons of grain | Labeled on corn and sorghum. | |
| Methoprene (Diacon II) | 1–14 fl oz per 5 gal water | Insect growth regulator; does not kill adults but prevents the development of larvae into adults, stopping cycling of generations. | |
| Surface treatments or topdressing after the bin is filled | Pirimiphos-methyl (Actellic 5E) | 3.0 oz per 2 gal of water per 1,000 sq ft of surface area | Helps prevent establishment of migrating insects if grain cannot be moved. |
| Diatomaceous earth | Several trade names are sold (Insecto, Protect-It, etc.); check rates. | Cover all interior wall surfaces of empty storage area. | |
| Bacillus thuringiensis | Many trade names are sold (Dipel, Biobit,Javelin, etc.); check rates. | For Indian meal moth and almond moth control. Does not control weevils or other beetles. | |
| Methoprene (Diacon II) | 0.034 fl oz (1ml) per 1 gal water per 1,000 sq ft of surface area; see label for further details | Insect growth regulator; does not kill adults but prevents the development of larvae into adults, stopping cycling of generations. | |
| pyrethrins + piperonyl butoxide | Several trade names sold; check rates | Approved for barley, corn, oats, rye, sorghum, and wheat | |
| Bin headspace | Dichlofos resin strips | Hang one strip per 1,000 cu ft of bin headspace | Barley, corn, rye, oats, sorghum, and wheat. Protects against Indian meal moths. |
