Disrupt MCH 500mg and 1000mg XR (Extended Release) Strips, Douglas-fir and Spruce Beetle Repellent, Hercon

Timing: Place dispensers in the field before beetle flight. Expected longevity of the dispensers is 50-60 days depending on weather conditions. Apply product before beetles begin to fly and attack trees in the Spring for maximum effect. If it is applied early in the flight season, but after beetles have initiated attacks on a few trees, it may still reduce the number of trees that are killed within the treated area. Beetle flight in a typical year occurs late April to early May. Hercon Disrupt MCH applied by the third week in April should be effective in protecting trees and will last throughout the beetle flight. A second treatment is recommended during an extended beetle flight.

Application Rates

Individual Trees: For individual trees and areas 1 acre or less, place two 500 mg dispensers on opposite sides of each tree. For trees larger than 24 inches dbh, place four 500mg dispensers per tree equidistantly around the bole at a height easy to reach (i.e. 6-8 feet).

Tree stands less than 2 acres: Place dispensers evenly around the perimeter of the treated area. Space the dispensers approximately 15 feet apart. This will result in a dose close to 30 dispensers/acre.

Tree stands more than 2 acres: Rate of application is 30-40 dispensers per acre. Place the dispensers in a grid pattern about 17.5-20 feet apart. Dispensers are usually placed on a tree, but if there are breaks in the tree stand, dispensers can be placed on fence posts, snags, shrubs or other objects such as stumps or logs as low as 1-2 feet above the ground to maintain proper spacing for the treatment area.

Place at a height that applicators can easily reach (i.e. 6-8 feet).

For best results when using this product, remove and destroy all beetle-infested trees in treatment area before application.

In most cases 40 dispensers/acre (75/hectare) is sufficient. However, if it is deemed necessary to increase the number of dispensers, 80 dispensers/acre (250/hectare) is the maximum dose. Use a second treatment as needed. Re-treat each year when Douglas-fir beetle infestations are likely.

Because there are many considerations when using this product (population densities, proximity, size and rate of growth of an infestation, stand age and compositions, elevation, climate, local weather) inexperienced users are advised to consult a professional forest entomologist or their State Forestry Agency for guidance. Monitor for infestations by visual inspection of the tree trunks.

Application Rates

Individual Trees: For individual trees and areas 1 acre or less, place one 1000 mg dispensers on opposite sides of each tree. For trees larger than 24 inches dbh, place two 1000mg dispensers per tree equidistantly around the bole at a height easy to reach (i.e. 6-8 feet).

Tree stands less than 2 acres: Place dispensers evenly around the perimeter of the treated area. Space the dispensers approximately 30 feet apart. This will result in a dose close to 15 dispensers/acre.

Tree stands more than 2 acres: Rate of application is 15-20 dispensers per acre. Place the dispensers in a grid pattern about 35-40 feet apart. Dispensers are usually placed on a tree, but if there are breaks in the tree stand, dispensers can be placed on fence posts, snags, shrubs or other objects such as stumps or logs as low as 1-2 feet above the ground to maintain proper spacing for the treatment area. Place at a height that applicators can easily reach (i.e. 6-8 feet).

For best results when using this product, remove and destroy all beetle-infested trees in treatment area before application.
In most cases 20 dispensers/acre (36/hectare) is sufficient. However, if it is deemed necessary to increase the number of dispensers, 40 dispensers/acre (125/hectare) is the maximum dose. Use a second treatment as needed. Re-treat each year when Douglas-fir beetle infestations are likely.

Because there are many considerations when using this product (population densities, proximity, size and rate of growth of an infestation, stand age and compositions, elevation, climate, local weather) inexperienced users are advised to consult a professional forest entomologist or their State Forestry Agency for guidance. Monitor for infestations by visual inspection of the tree trunks.