General Information

Insecticide Resistance Management (IRM)

Nufos 15G contains a Group 1B insecticide. Insect/mite biotypes with acquired resistance to Group 1B may eventually dominate the insect/mite population if Group 1B insecticides are used repeatedly in the same field or in successive years as the primary method of control for targeted species. This may result in partial or total loss of control of those species by Nufos 15G or other Group 1B insecticides.

To delay development of insecticide resistance, the following practices are recommended:

- Avoid consecutive use of insecticides with the same mode of action (same insecticide group) on the same insect species.

- Use tank mixtures or premix products containing insecticides with different modes of action (different insecticide groups) provided the products are registered for the intended use.

- Base insecticide use on comprehensive Integrated Pest Management (IPM) programs.

- Monitor treated insect populations in the field for loss of effectiveness.

- Contact your local extension specialist, certified crop advisor, and or manufacturer for insecticide resistance management and/or IPM recommendations for the specific site and resistant pest problems.

For further information or to report suspected resistance, you may contact Cheminova, Inc. by calling 1-800-548-6113 or over the internet at

Application Rates

Do not apply by aircraft at a rate greater than 1 lb. ai chlorpyrifos per acre.

Limitations, Restrictions, and Exceptions


Apply as an at-plant T-band in a 4-to 10-inch band over an open seed furrow in front of the press wheel and incorporate into the top 1/2 to 1 inch of soil using suitable equipment. For postplant application, incorporate the granules in a 4-to 10-inch band to a depth of 1/2 to 1 inch using a suitable cultivator. Apply Nufos 15G with equipment that provides uniform distribution of the granules over the row. Equivalent rates of Nufos 15G per acre for various row spacing are given in Table 1 in the label.

Specific Use Precautions:

- Do not apply as an in-furrow treatment.

Specific Use Restrictions:

- Do not make more than 1 application of Nufos 15G per season or apply more than 2 applications of other products containing chlorpyrifos.

- The maximum single application rate is 2 lb ai chlorpyrifos per acre for preplant/atplant incorporation and 1 lb ai chlorpyrifos per acre for foliar and postharvest application.

- Do not make a foliar application of Nufos 4E or other product containing chlorpyrifos within 10 days of an at-plant application of Nufos 15G.

Pre-Harvest Interval

28 days

Restricted Entry Interval

24 hours

Exception: If the product is soil-injected or soil-incorporated, the Worker Protection Standard, under certain circumstances, allows workers to enter the treated area if there will be no contact with anything that has been treated.