Introduction

646
Oats – See small grain cereals
Grasshopper Management on Pastures, Rangelands, Hay, Headlands, and Roadsides
Note: Insects for biological control of weeds such as leafy spurge may be introduced and established in some areas of
Manitoba and Saskatchewan. If grasshopper numbers become high, consider using control strategies and insecticides that
will minimize harm to these biological control agents.
Application LD
Insecticide
Preharvest
50
Rate/Acre
(A=aerial; (Mammalian
(and insecticide group 1 )
interval (days)
G=ground) Toxicity) 2
Reduced Agent and Area Treatments (RAATs): Grasshoppers on rangelands may be managed by applying
certain insecticides in treated swaths, which alternate with untreated swaths. This can reduce the cost of control and
amount of insecticide used by more than 50 percent, while resulting in effective control. For more information
on managing grasshoppers by this method see: http://www.grasshoppercontrol.com/_pdf/articles/raat.pdf.
Spreadable Bran Baits
Nolo Bait (Pastures, Rangelands) Minimum of 0.45 kg A or G
Eco bran (pastures, rangelands, field
borders, headlands, right-of-way, roadsides,
wastelands) (C)
0.8-1.6 kg 0-2 (see label) G N/A
Sprays
Coragen (D) (Pastures and Rangeland) 51-101 ml 0 G >5,000
Decis 5EC /Poleci (P)
(Rangeland, pastures, roadside)
Mako (P) (Roadsides, headlands, and
summerfallow) (young grasshoppers only)
UP-Cyde (P) (Roadsides, headlands, and
summerfallow) (young grasshoppers only)
Matador (P)
(Unimproved pasture, summerfallow )
(young grasshoppers only)
Silencer (P)
(Unimproved pasture)
(young grasshoppers only)
40-60 ml (Decis)
81-121 ml (Poleci)
20-28 ml
33-46 ml
25-34 ml (Ground)
34 ml (Aerial)
25-34 ml (Ground)
34 ml (Aerial)
N/A
Treated areas
must not be grazed or
cut for hay.
A or G
(Rangeland,
pastures)
G (Roadsides)
395
G 242-542
355
3 A or G 64-110
3 A or G 64-110
Malathion 500 (OP) (hay only) 0.69 L 7 A or G 4302
Malathion 85E (OP) (pastures, rangelands) 0.336 L Do not apply to
fields occupied by
dairy animals, but
may be grazed or
harvested on the day
of application.
G 5,500
Dibrom (OP)
(Rangeland, pastures, dairy and horse
paddocks)
Lagon /Cygon 480 EC /Cygon 480-AG (OP)
(pasture, wasteland)
0.21-0.33 L (young
grasshoppers)
0.27-0.39 L (adult
grasshoppers)
0.22 L (nymphs)
0.34-0.41 L (adults)
4 A or G 345
2 days – 0.22L rate
7-28 days – 0.34-0.41L
rates (see labels)
A or G 60-450
Lagon (OP) (Hay) 0.17-0.22 L 2 A or G 60-450