General Information

For Use In Canada


Foray 76B contains the spores and insecticidal crystals of a naturally occurring strain of Bacillus thuringiensis subspecies kurstaki.

Foray 76B is highly specific to some lepidopteran larvae. It is a stomach poison only and therefore must be ingested by the larvae to be effective. After ingestion of a sufficient dose, feeding ceases and death will follow in 2-5 days.

In general, larvae should be treated when they are newly hatched.

Young larvae (early instars) are most susceptible to the effects of Bacillus thuringiensis subspecies kurstaki and less damage will have been caused by larval feeding. Larvae must be feeding actively when treatments are made since ingestion is necessary for effective results. The direct target for application is the foliage, buds, and flowers (objects of larval feeding). Thorough spray coverage with well-distributed deposits of Foray 76B is necessary to assure that the feeding larvae ingest a toxic dose.

Foray 76B is a water based formulation which may be applied undiluted or diluted with clean water. Dilute with minimal quantities of water only when required to improve deposit. Do not use petroleum-based solvents. Foray 76B does not settle out rapidly, so continual agitation is not recommended and should be avoided. Use diluted mixture of Foray 76B within 12 hours of mixing and recirculate mixture before loading and/or application.

Even though Foray 76B deposits are relatively resistant to wash-off, avoid application when significant rainfall is imminent.

For early morning applications, foliage should not be wet with dew to the point of runoff.

Consult with recognized forest pest control authority or Valent BioSciences Corporation representative regarding appropriate timing and method of application. The timing and number of applications required for effective control will depend upon foliage development and larval activity. For effective control, applications should coincide with sufficient foliage development (shoot elongation or leaf expansion) to ensure maximum spray deposit. To the extent possible, apply treatments after egg hatch has been completed to assure that the maximum number of larvae are present during the treatment period. If Foray 76B is applied to later larval instars and/or extremely high larval populations, use the higher label rates and/or additional applications.

To control Eastern Spruce Budworm, treat prior to 5th instar larval development and when bud flush/shoot development is sufficient to allow good deposit on emerging needles.

For consistently acceptable control of Western Spruce Budworm, higher rates and volumes of spray may be required to achieve satisfactory deposit in mountainous terrain.

Treat against Gypsy Moth when larvae are in 2nd and 3rd instar and when leaf expansion is 40-50%. When egg hatch is extended, 2 or more applications, 7-10 days apart, may be required. For best control of Eastern Hemlock Looper, apply when larvae are young (early instars) before extensive damage occurs and/or when a majority of buds have flushed or shed bud caps. Repeat applications at intervals to maintain control, usually 3-14 days depending on larval growth and weather. If control is sought with a single spray, wait until egg hatch is essentially complete.

To control Whitemarked Tussock Moth in softwood species, make the first application at late egg hatch and follow up with a second application 5-7 days later.

For control of Forest Tent Caterpillar apply undiluted Foray 76B at a rate of 12-20 BIU/ha (0.6 - 1.0L product/ha) when larvae are approximately 1.3 cm in length and when leaves of deciduous trees are approximately 50% expanded; apply by air or ground; if necessary repeat application in 7-10 days.

For control of Jackpine Budworms, apply undiluted at 20-30 BIU/ha to early larval instars; double applications several days apart may be considered. For consistent control of very high larval populations, one single application at higher rates up to 60 BIU/ha may be required.


With ground equipment, provide thorough coverage while minimizing runoff. Dilute Foray 76B only to provide sufficient volume for thorough coverage.

For mist blower applications, add the recommended volume of Foray 76B to water, at a mix ratio ranging from 1:20 to 1:50. Do not exceed 150 litres/hectare total mixture.

For high volume hydraulic sprayers, add the recommended volume of Foray 76B to water at a mix ratio ranging from 1:50 to 1:500. Do not exceed 1500 litres/hectare total mixture.


Apply only by fixed-wing or rotary aircraft equipment which has been functionally and operationally calibrated for the atmospheric conditions of the area and the application rates and conditions of the label.

Label rates, conditions and precautions are product specific.

Apply only at the rate recommended for aerial application on the label. Where no rate for aerial application appears for the specific use, this product cannot be applied by any type of aerial equipment.

Ensure uniform application by employing appropriate marking devices.

Use Precautions

Apply only when meteorological conditions at the treatment site allow for complete and even crop coverage. Apply only under conditions of good practice specific to aerial application as outlined in the Basic Knowledge Requirements for Pesticide Education in Canada: Applicator Core and Aerial Module, developed by CAPCO.



NOTICE TO USER: This control product is to be used only in accordance with the directions on the label. It is an offence under the Pest Control Products Act to use a control product under unsafe conditions.

NATURE OF RESTRICTION: This product is to be used only in the manner authorized. Consult local pesticide regulatory authorities about use permits which may be required.

Forestry Use: Ground/Aerial Application for sites greater than 500 ha.

Woodlands Use: Aerial Application for sites 500 ha. or less.

Residential Use: Aerial Application.

Consult local Transport Canada office regarding air regulations for aerial applications for urban and/or forestry applications.

Foray 76B may be used for aerial application in urban areas for treatment of residential areas and municipal recreational areas (including parks, parkland, vacant lots, shelterbelts, and rights of way under municipal jurisdiction).

Undiluted applications are recommended for Eastern and Western Spruce Budworm, Gypsy Moth, Jackpine Budworm, Eastern Hemlock Looper, Whitemarked Tussock Moth and Forest Tent Caterpillar. However, Foray 76B may be diluted with water and applied at the rates indicated in the dose rates table. Total volume of spray material to be applied per hectare depends upon target pest, target foliage, weather, spray equipment and droplet size.

Recommended droplet size spectra are from 30-80 microns for coniferous foliage and 50-150 microns for broadleaf foliage.


For resistance management, please note that Foray 76B contains a Group 11 insecticide. Any insect population may contain individuals naturally resistant to Foray 76B and other Group 11 insecticides. The resistant individuals may dominate the insect population if this group of insecticides are used repeatedly in the same fields. Other resistance mechanisms that are not linked to site of action but are specific for individual chemicals, such as enhanced metabolism, may also exist. Appropriate resistance-management strategies should be followed.

To delay insecticide resistance:

- Where possible, rotate the use of Foray 76B or other Group 11 insecticides with different groups that control the same pests in a field.

- Use tank mixtures with insecticides from a different group when such use is permitted.

- Insecticide use should be based on an IPM program that includes scouting, record keeping, and considers cultural, biological and other chemical control practices.

- Contact your local extension specialist or certified crop advisors for any additional pesticide resistance-management and/or IPM recommendations for the specific site and pest problems in your area.

- Monitor: Monitor efficacy of Foray 76B and other Group 11 insecticides used against the targeted pest(s) and record other factors that may influence insecticide performance and/or pest development.

- Reporting: If a Group 11 target site insecticide, such as Foray 76B, appears to be less or no longer effective against a pest that it previously controlled or suppressed, contact a Valent BioSciences Corporation representative at 1-800-323-9597 or at www.valentbiosciences.com to assist in determining the cause of reduced performance.

Limitations, Restrictions, and Exceptions

See the RESTRICTED USES section of the label for aerial application to forests, woodlands, and residential areas, and ground application to forests.