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The Pest Management Regulatory Agency (PMRA) recently approved 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 |
For a copy of the new minor use label contact your local vegetable 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
Source: Josh Mosiondz, provincial minor use coordinator, OMAFRA.
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