By Josh Mosiondz, Minor Use Coordinator, OMAFA
& Cassie Russell, Nursery and Landscape Specialist, OMAFA

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a  minor use label expansion registration for ACELEPRYN^® insecticide for control of Box Tree Moth (BTM) on Outdoor Ornamentals (boxwood) in Canada. This use is only approved for OUTDOOR grown boxwood and cannot be used in the greenhouse. This product registration is for commercial facilities only. ACELEPRYN^® is also not approved for landscape or cosmetic uses in Ontario.

ACELEPRYN^® insecticide was already labeled for management of insects on a wide range of crops in Canada. This minor use proposal was submitted by the Ontario Ministry of Agriculture, Food, and Agribusiness, OMAFA, as a result of minor use priorities established by growers and extension personnel.

The following is provided as an abbreviated, general outline only. Users should be making insect management decisions within a robust integrated insect management program and should consult the complete label before using ACELEPRYN^® insecticide.

Crop(s)	Target	Rate (g product / ha)	Application Information
Outdoor Ornamentals (Boxwood), Container and Field grown	Box Tree Moth (BTM)	0.375 L per ha Or 3.75 mL per 100 m2 (75 g ai/ha)	Apply up to 3 foliar applications per year with a minimum re-application interval of 7 days in a minimum of 100 L of water per ha.   Do not exceed 1.125 L product per ha per year (225 g ai/ha per year)   Application should be made as soon as the larvae hatch or signs of pest presence is detected. Repeat treatment if necessary.   Plant safety has been found to be acceptable for many ornamental plants, however, not all possible plant species and varieties have been tested under all conditions. It is recommended to test ACELEPRYN Insecticide on a small portion of the crop to ensure that a phytotoxic response will not occur.

Important Reminders:

Be careful not to exceed the max allowed per year

For facilities on a Japanese beetle (JB) certification program that utilize ACELEPRYN^® (a.i. chlorantraniliprole), you should be aware that utilizing a high rate for JB control and also making a foliar application for BTM will EXCEED the max rate of product per year of 1.125 L/ha. (For example, an application for JB of 0.88 L/ha + an application for BTM at 0.375 L/ha = 1.255 L/ha.

In order to utilize both a foliar application of ACELEPRYN^® for BTM with a drench application for JB, you must only use a low rate for a JB beetle drench to ensure you’re not exceeding the amount of active ingredient per year (1 low-rate drench application + 1 foliar per ha per season).

If you do not use ACELEPRYN^® or a product containing chlorantraniliprole as a drench against Japanese beetles, the max number of applications for a foliar spay would be 3 per year ( 3 x 0.375 L = 1.125).

Optimal timing for Acelepryn and Box Tree Moth

ACELEPRYN^® has shown some efficacy against egg hatch. Therefore, this tool is best utilized during the summer when BTM adults are actively laying eggs for the next generation (July – September) according to pheromone trap captures and scouting.

Applications of ACELEPRYN^®  will not be effective against pupal stages of BTM, nor should they be used when Box tree moth are still in their hibernaria in the spring.

Disclaimers: ACELEPRYN^®  is toxic to aquatic organisms. Observe spray buffer zones specified under DIRECTIONS FOR USE. Toxic to certain beneficial arthropods (which may include predatory and parasitic insects, spiders, and mites). Minimize spray drift to reduce harmful effects on beneficial arthropods in habitats next to the application site such as hedgerows and woodland.  Toxic to certain beneficial arthropods (which may include predatory and parasitic insects, spiders, and mites). Avoid application when beneficial arthropods are in the treatment area. Chlorantraniliprole is persistent and may carryover. It is recommended that this product not be used in areas treated with any products containing chlorantraniliprole during the previous season. This product demonstrates the properties and characteristics associated with chemicals detected in groundwater. The use of this product in areas where soils are permeable, particularly where the water table is shallow, may result in groundwater contamination.  To reduce runoff from treated areas into aquatic habitats, avoid application to areas with a moderate to steep slope, compacted soil, or clay. Avoid application when heavy rain is forecast. Contamination of aquatic areas as a result of runoff may be reduced by including a vegetative filter strip between the treated area and the edge of the water body.

Follow all other precautions, restrictions, and directions for use on the ACELEPRYN^® insecticide label carefully.

For a copy of the new minor use label contact your local crops specialist, local regional supply outlet, or visit the PMRA label site http://www.hc-sc.gc.ca/cps-spc/pest/registrant-titulaire/tools-outils/label-etiq-eng.php

Note:  This article is not intended to be an endorsement or recommendation for this particular product, but rather a notice of registration activity.