Herbicides
257
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Safety - page 25 • First aid - page 33 • Resistance management - page 41
conditions, such as heavy rainfall, prolonged cool weather, frost or wide fluctuations in day/night temperatures,
temporary lightening in crop colour and occasionally, a slight reduction in crop height may occur.
Restrictions
Rainfall
:
Rainfall within 4 hours of application of Retain will result in reduced weed control.
Grazing
:
Wheat or spring barley may not be grazed or fed to livestock or to lactating dairy animals within 7 days of
application. Do not harvest forage or cut hay within 30 days after application. Withdraw meat animals from treated
fields at least 3 days prior to slaughter.
Pre-harvest Interval
:
Do not harvest the treated mature crop within 60 days after application.
Re-cropping Restrictions
:
Canola, flax, lentils and alfalfa may be planted two months after an application of Retain.
Any crop may be planted in the year following the use of Retain.
Environmental Precautions
This product contains a petroleum distillate which is moderately to highly toxic to aquatic organisms. Avoid
contamination of aquatic systems. Toxic to small mammals, birds, aquatic organisms and non-target terrestrial
plants. Observe buffer zones. Do not spray exposed roots of trees and ornamentals. The use of chemical may result
in contamination of the ground water particularly where soils are permeable (e.g. sandy soils) and/or the depth to the
water table is shallow.
Storage
Store product in original container. If product is frozen, bring to room temperature and agitate before use.
Reward
Group 22
Formulation
Product
Company
Active ingredient
Formulation
Container size
Reward (PCP# 26271)
Syngenta
Diquat:240 g/L
Liquid
4
x 3.78 L
Aquatic use: Weed control in still or slow moving water of farm ditches, farm dugouts, farm ponds, lakes and canals.
Weeds, Rates and Staging
Weed
Staging
Rate
Water weeds:
Canada waterweed,
coontail, duckweed, pondweeds, water
milfoil
Algae
:
Cladophora
,
Spirogyra
,
and
Pithophora
sp. (temporary control)
Apply only after weeds are visible and in an
active stage of growth which is normally
sometime in late May through June as
growth is dependent on water temperatures.
For areas less than 1.5 m (5 feet) deep:
7.4
L/acre.
For areas more than 1.5 m (5 feet) deep:
10 - 11.8
L/acre.
Calculating area to be treated: length (m) x
width (m) ÷ 10,000 m
2
x 2.47 = acres.
Application Information
How to Apply
:
For floating weeds, use surface application: Dilute one part Reward with at least four parts clean
water and spray over water surface. Apply from the banks of small bodies of water.
For submerged weeds, inject below the water surface: A suction type of boat bailer is mounted on the cavitation plate
of an outboard motor and the end of the inlet tube inserted into a solution containing one part Reward diluted with at
least 10 parts of clean water (a backpack sprayer may also be used). Make lines of travel at regular intervals through
the water (3 m or less apart) over the area to be treated until the whole area has received a uniform application.
Application Tips
Do not apply to muddy water and do not agitate water excessively during one or two days after treatment as the
effectiveness of the chemical will be reduced. Use clean water for diluting the chemical. Do not use wetting agents
Retain (cont’d)