By Josh Mosiondz, Minor Use Coordinator, OMAFRA
The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration amending ETHREL® Liquid Plant Growth Regulator to differentiate PHI values between mechanical- and hand-harvesting methods used on field tomatoes in Canada. ETHREL® Liquid Plant Growth Regulator was already registered for use on field tomatoes with the same use pattern in Canada. This minor use proposal was submitted by the Ontario Ministry of Agriculture, Food, and Rural Affairs 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 harvest decisions within a robust, integrated pest management program and should consult the complete label before using ETHREL® Liquid Plant Growth Regulator.
| Crop(s) | Target | Rate (L of product / ha) | Application Information | PHI (days) |
| Field Tomatoes | Promotion of earlier uniformity, and concentrated tomato ripening | 3.75 | Mix 3.75 litres of ETHREL Plant Growth Regulator in 30 to 500 litres of water and broadcast spray uniformly over 1 hectare of foliage and fruit. When temperatures are expected to average less than 18˚C and vegetative growth is dense, mix 6.4 litres of ETHREL Plant Growth Regulator in 30 to 500 litres of water and broadcast spray uniformly over 1 hectare of foliage and fruit. HARVEST FRUIT AT PROPER MATURITY, generally 14 to 21 days after treatment. Observe treated fruit frequently for condition of crop. Cool temperatures can slow colour development and extend the period between treatment and harvest. Some defoliation or yellowing of foliage following treatment will be observed. | 3 Days for Mechanical Harvest 9 Days for Hand-Harvest |
TOXIC to aquatic organisms, birds, small mammals and non-target terrestrial plants. Observe buffer zones specified under DIRECTIONS FOR USE. 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 strip between the treated area and the edge of the water body.
Follow all other precautions, restrictions, and directions for use on the ETHREL® Liquid Plant Growth Regulator label carefully.
For a copy of the new minor use label contact Amanda Tracey, Vegetable Crops Specialist, OMAFRA, Ridgetown (519) 350-7134, your regional supply outlet, 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
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