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Signs and symptoms of a codling moth larvae infested apple. Note the brown material (frass) being pushed out from larval entry holes and the dark discolouration around each hole.
Signs and symptoms of a codling moth larvae infested apple. Note the brown material (frass) being pushed out from larval entry holes and the dark discolouration around each hole.
August 22, 2022

The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for Purespray Green spray oil for management of numerous insects and powdery mildew on various crops and crop groups in Canada. Purespray Green spray oil was already labeled for management of insects and powdery mildew on a wide range of crops in Canada. These minor use proposals were submitted by the British Columbia Ministry of Agriculture, Food and Fisheries (BCMAFF); Ontario Ministry of Agriculture, Food, and Rural Affairs (OMAFRA); and Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec (MAPAQ), and Agriculture and Agri-Food Canada’s Pest Management Centre (AAFC-PMC) 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 and disease management decisions within a robust integrated pest management program and should consult the complete label before using Purespray Green spray oil.

 

Crop(s)

Target

Rate (L product / specified L of water)

Application Information

Crop Group 4-13 (Leafy Vegetables) ***

Deterrence of feeding by Aphids

10L in 1000L of water

Ground application only. Begin when aphids appear. Apply at 7-14 day intervals. Maximum 8 applications per year. 1 day PHI

Crop Group 13-07 (Small fruit and berries) ***

Control of Scale

20L in 1000L of water

Dormant to Green tip up to 1 cm green or first leaf. Foliar spray using ground application equipment only. For Lecanium Scale in highbush blueberry, apply one application as dormant spray in late winter. Use 1000L/ha for small bushes –1500L/ha for large bushes. Maximum of two dormant applications per year if summer spray applications are expected during the growing season. Apply at 7 – 14 day intervals.

Croup Group 25 (Herbs) (field and greenhouse) **

Suppression of powdery mildew (Podosphaera spp.) on crops that are susceptible to these diseases; suppression of mites; deter the feeding of aphids

10L in 1000L of water

Mites, aphids: begin when mites and/or aphids appear. Minimum reapplication interval of 7 days. Powdery mildew: begin when conditions are favourable for disease development and/or when first symptoms appear. Reapplication interval of 7 – 14 days.

Crop Group 26 (Spices) (field and greenhouse) **

Apples *

Control of Codling Moth

10L in 1000L of water

For codling moth overwintering, 1st summer and 2nd summer generations: apply at or just prior to first egg hatch and during egg laying. Apply every 7-14 days depending upon level of pest pressure. Do not exceed more than 10 L oil per ha per application for summer treatments. For apples and pears do not use oil within 14 days before or after captan fungicide. Do not apply as dormant spray.

Pears *

Grapes *

Suppression of Leafhopper Nymphs

10L in 1000L of water

Eight (8) summer spray applications with a 10-14 day interval. Begin applications when eggs or small nymphs are present. Thorough coverage is essential. PHI is 14 days for table grapes as oil will remove bloom on grapes. On grapes, do not tank mix oil and copper more than once per season. Do not use copper and oil together with fruit present. Do not use oil within 14 days before or after captan fungicide. 

Wasabi ****

Aphids

6.8 – 9L in 900L of water

Begin when aphids appear.  Apply at 7 day interval. Pre-Harvest Interval (PHI): 14 days

* - submitted by BCMAFF, ** - submitted by OMAFRA, *** - submitted by MAPAQ, **** - submitted by AAFC-PMC

 

TOXIC to aquatic organisms. 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. For terrestrial uses: Do not apply directly to water, or to areas where surface water is present or to intertidal areas below the mean high-water mark. Do not contaminate water when disposing of equipment washwater or rinsate. Drift and runoff may be hazardous to aquatic organisms in water adjacent to treated areas.

 

Follow all other precautions, restrictions, and directions for use on the Purespray Green spray oil label carefully.

 

For a copy of the new minor use label your local crop specialist, 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

 

 

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Submitted by Karen Davidson on 22 August 2022