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Grasshopper Biology and Management (continued)

E-272 (Revised), February 1997

Insecticidal Control Recommendations

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Insecticidal Control Recommendations

Corn (grain, fodder, ensilage)

INSECTICIDE DOSAGE IN
LB AI/ACRE		 PRODUCT
PER ACRE		 RESTRICTIONS
ON USE
Asana XL* 0.03-0.05 5.8 - 9.6 fl oz Do not apply within 21 days of harvest.
Carbaryl
(Sevin)		 1/2 - 1-1/2 varies by formulation No limitations on forage. The lower rate (� lb.) is suggested for nymphs on  small plants or sparse vegetation. The higher rate is suggested for mature grasshoppers or when application is made to crops requiring greater coverage.
Dimethoate 400
Dimethoate 4EC		 1/2 1 pt Do not harvest, feed or graze within 14 days of last application. Do not apply to corn during the pollen-shed period. Do not enter treated   fields within 4 days of last application.
Ethyl
parathion 4E*		 3/8 3/4 pt Aerial application only. Do not apply within 12 days of harvest, cutting or foraging. Do not enter treated fields within 3 days after application. Fields must be posted.
Furadan 4F* 1/8 - 1/4 4 - 8 fl oz Use a minimum of 2 gals. of finished spray per acre with aerial equipment or 10 gals. of finished spray per acre with ground equipment. Do not forage, cut or harvest within 30 days of last application. Do not apply on seed corn less than 14 days prior to detasseling or rogueing. If prolonged intimate contact will result, do not re-enter treated field within 14 days of application without wearing proper protective clothing.
Lorsban 4E 1/4 - 1/2 1/2 - 1 pt. Do not allow livestock to graze in treated areas within 14 days nor feed treated corn silage, fodder or grain to meat or dairy
animals within 35 days after treatment.
Malathion
57 EC		 0.9 1.5 pt Do not apply within 5 days of harvest or forage use.  Injury may occur in the whorl and silk stage using this type malathion.
Methyl
parathion 4E*		 1/2 1 pt. Aerial application only.  Do not apply within 12 days of harvest. Do not enter treated fields within 48 hours after application.   Fields must be posted.
Penncap-M* 1/2 - 3/4 2 to 3 pt. Do not apply within 12 days of harvest or forage use. Do not enter treated fields within 48 hours after application. Fields must be posted.
Warrior* 0.015 - 0.03 1.92 - 3.84 fl oz Do not apply more than 0.96 pt/acre per season. Do not apply within 21 days of harvest.
* EPA has classified this insecticide as a restricted use pesticide.

 

Forage Hay (alfalfa, sweetclover)

INSECTICIDE DOSAGE IN
LB AI/ACRE		 PRODUCT
PER ACRE		 RESTRICTIONS
ON USE
Baythroid* 0.044 2.8 fl oz One application may be made per cutting. A total of 11.2 fl.oz./acre may be applied per crop season.
Carbaryl
(Sevin)		 1/2-1� varies by formulation No time limitation for   grazing or cutting of sweetclover. Do not cut or graze alfalfa within 7 days of application.
Dimethoate 400
Dimethoate 4EC
(alfalfa only)		 1/4 - 1/2 1/2 to 1 pt Do not apply to alfalfa in bloom. Do not apply within 10 days of harvest or pasturing. Make only 1 application per cutting. Do not enter treated fields within 4 days after application. Fields must be posted.
Furadan 4F*
(alfalfa only)		 1/8 - 1/4 4 to 8 fl oz Do not cut or graze for 7 days after treatment. Do not apply more than twice per season or more than once per cutting. Do not move bees into alfalfa field within 7 days of application.
Lorsban 4E
(alfalfa only)		 1/4 - 1/2 1/2 to 1 pt Do not cut or graze alfalfa within 7 days after application of � lb. per acre or within 14 days after application of � lb. per acre. Do not apply more than once per cutting.
Malathion
57 EC		 0.9-1.25 1.5 to 2 pts No time limitation on cutting or grazing. Read label for bee precautions.
Malathion
(95% ULV)		 0.6 8 fl oz Aerial application. No time limitation on cutting or grazing. Do not apply to alfalfa or clover in bloom or seed alfalfa.
Methyl
parathion 4E*		 1/4 - 1/2 1/2 to 1 pt Do not treat closer than 15
days before harvest, cutting, or grazing. Do not apply to alfalfa or clover if the crop or weeds in the treatment area are in bloom.
Penncap-M*
(alfalfa only)		 1/2 - 3/4 2 to 3 pts Do not apply within 15 days of harvest or grazing. Read label for bee precautions.  Do not enter treated fields within 48 hours after application. Fields must be posted.
*EPA has classified this insecticide as a restricted use pesticide.

 

Pasture or Rangeland

INSECTICIDE DOSAGE IN
LB AI/ACRE		 PRODUCT
PER ACRE		 RESTRICTIONS
ON USE
Carbaryl
(Sevin)		 1/2 - 1 1/2 varies by formulation Pastures: Pre-harvest  interval is 0 days for aerial application and 14 days for ground application.  Rangeland: Aerial application only. Pre-harvest interval is 0 days.  The lower rate (� lb.) is suggested for nymphs on small plants or sparse vegetation. The higher rate (1� lb.) is suggested for mature grasshoppers or when material is applied to crops requiring greater coverage.
Malathion
57 EC		 0.9 - 1.25 1.5 to 2 pts No time limitation on grazing or cutting.
Malathion
(95% ULV)		 0.6 8 fl oz Aerial application. Applied alone or dissolved in 1 pint diesel oil per acre. No time limitation on cutting or grazing.
Orthene 75S 1/8 0.166 lb. (or 2.66 oz., dry wt.) Do not make more than one application per season. Do not apply when lactating dairy cattle are present. Do not pasture or feed treated hay to lactating dairy within 21 days after application. Remove meat animals from treated areas at least one day before slaughter if they were present at application or grazed treated areas within 21 days after application.
Penncap-M* 1/2 - 3/4 2 to 3 pts Do not apply within 15 days of harvest or grazing. Do not enter treated fields within 48 hours after application. Fields must be posted.
*EPA has classified this insecticide as a restricted use pesticide.

 

Potatoes

INSECTICIDE DOSAGE IN
LB AI/ACRE		 PRODUCT
PER ACRE		 RESTRICTIONS
ON USE
Asana XL* 0.03 - 0.05 5.8 - 9.6 fl oz Do not apply within 7 days of harvest. Do not feed vines to livestock. Do not exceed 0.35 lbs.  AI/acre/season.
Dimethoate
4EC		 1/4 - 1/2 1/2 - 1 pt Potatoes may be harvested on day of application.
Penncap-M* 1/2 - 3/4 2 - 3 pts Do not apply within 5 days of harvest
*EPA has classified this insecticide as a restricted use pesticide.

 

Small Grain (wheat, barley, rye, oats)

INSECTICIDE DOSAGE IN
LB AI/ACRE		 PRODUCT
PER ACRE		 RESTRICTIONS
ON USE
Carbaryl
(Sevin)
(wheat only)		 1/2 - 1 1/2 varies by formulation Do not apply within 21 days of harvest. Do not make more than 2 applications after the boot stage. No limitations on forage.
Dimethoate 400
Dimethoate 4EC
(wheat only)		 3/8 3/4 pt Do not harvest wheat within 35 days of last application. Do not feed or graze within 14 days of last application. Do not enter treated fields treated fields within 4 days after application. Fields must be posted.
Ethyl
parathion 4E*
(wheat and barley)		 3/4 1/5 pt Aerial application. Do not apply within 15 days of harvest. Do not enter treated fields within 3 days after application. Fields must be posted.
Furadan 4F* 1/8 - 1/4 4 to 8 fl oz Do not make more than 2 applications at 1/8 lb. rate or t   application at 1/4 lb. rate per season. Do not apply within 21 days of harvest.**   Use a minimum of 10 gals. finished spray per acre with ground equipment and 2 gals. per acre with aerial equipment. Apply before heads emerge from boot. Do not feed treated forage to livestock. Do not apply near waterfowl areas.
Malathion
57 EC		 0.9-1.25 1.5 to 2 pts. Wait 7 days before harvest. No time limitation on grazing or straw for dairy or slaughter animals.
Methyl
parathion 4E*		 3/8 - 1/2 3/4 - 1 pt Aerial application only. Do not apply within 15 days harvest. Do not enter treated fields within 48 hours after application. Fields must be posted.
Penncap-M* 1/2 - 3/4 2 - 3 pts Do not apply within 15 days of harvest. Do not enter treated fields within 48 hours after application.  Fields must be posted.
Thimet 20G*
(wheat field border treatment only)		 0.24 oz. IA/1000 ft. of row 1/2 oz/1000 ft or row (min. 8" spacing at planting) Apply granules in the seed furrow at planting time.  Do not graze or feed foliage within 45 days of treatment.  Do not make any later applications after planting time treatment.
Warrior*
(wheat only)		 0.02 - 0.03 2.56 - 3.84 fl oz Do not apply within 30 days of harvest. Do not apply more than 0.06 lb. ai (0.48 pts) per acre per season.
*  EPA has classified this insecticide as a restricted use pesticide.
** Allowable under North Dakota state label #86002, issued 6123189.



Soybeans and Dry Beans

INSECTICIDE DOSAGE IN
LB AI/ACRE		 PRODUCT
PER ACRE		 RESTRICTIONS
ON USE
Asana XL* 0.03-0.05 5.8 - 9.6 fl oz Do not apply within 21 days of harvest. Do not exceed. 2 lb. active (soy and dry beans) ingredient per acre per season. Do not feed or graze livestock on treated plants.
Carbaryl
(Sevin)		 1/2 - 1 1/2 varies by formulation Preharvest interval is 0 days.
Dimethoate 400
Dimethoate 4EC		 1/4 - 1/2 1/2 - 1 pt Do not apply to soybeans within 21 days of harvest. Dry beans may be (soy and dry beans) harvested on day of application. Do not feed or graze livestock within 5 days of last application (soybeans). Do not feed treated vines to livestock (dry beans).
Furadan 4F*
(soybeans only)		 1/8 - 1/4 4 - 8 fl oz Do not use Furadan 4F as a foliar treatment if any formulation of Furadan was applied at planting time. Do not make more than 2 foliar applications per season. Do not apply within 21 days of harvest. Do not graze or feed foliar-treated forage to livestock or cut for silage or hay.
Lorsban 4E
(soybeans only)		 1/4 - 1/2 1/2 - 1 pt Do not apply last treatment within 28 days after harvest nor apply last 2 treatments closer than 14 days apart. Do not allow livestock to graze in treated area or feed treated soybean foliage, hay, and straw to meat or dairy animals.
Malathion
95% ULV
(soybeans only)		 0.6 8 oz Aerial application only. Do not apply within 7 days of harvest.
Orthene 75S
(dry beans)		 1/4 - 1/2 1/3 - 2/3 lb, dry wt. Do not apply within 14 days of harvest. Do not graze or cut vines for livestock forage.
Penncap-M*
(soybeans only)		 1/2 - 3/4 2 - 3 pts Do not apply within 20 days of harvest or grazing. Do not apply more than twice per season. Do not enter treated fields within 48 hours after application. Fields must be posted.
Scout X-TRA*
(soybeans only)		 0.016-0.024 2.28-3.41 fl oz Do not apply within 21 days of harvest. Do not graze or harvest treated soybean forage, straw or hay for livestock feed. Do not apply more than 27 fl. oz. per acre on soybeans in one growing season.
Warrior* (soybeans only) 0.025-0.03 3.2-3.84 fl oz Do not apply within 45 days of harvest. Do not apply more than 0.06lb. ai (0.48 pts.) per acre per season.
*EPA has classified this insecticide as a restricted use pesticide.

 

Sugarbeets

INSECTICIDE DOSAGE IN
LB AI/ACRE		 PRODUCT
PER ACRE		 RESTRICTIONS
ON USE
Carbaryl (Sevin) 1/2 - 1 1/2 Varies by formulation Do not apply within 14 days of harvest. The lower rate (� lb.) is suggested for nymphs on small plants or sparse vegetation. The higher rate (1� lbs.) is suggested for mature grasshoppers or when material is applied to crops requiring greater coverage.
Diazinon AG500 1/2 1 pt Tops may be fed to beef and dairy animals.
Lorsban 4E 1/4 - 1/2 1/2 - 1 pt Do not apply within 30 days before harvest. Do not allow livestock to graze in treated areas nor harvest treated beet tops as feed for meat or dairy animals within 30 days after last treatment.
Malathion 57EC 1.8 3 pts Do not apply within 3 days of harvest.
Malathion
95% ULV		 0.6 8 oz Do not apply within 7 days of harvest if tops are to be used as feed.
Methyl
parathion 4E*		 1/4 - 3/8 8 - 12 fl oz Do not apply within 20 days of harvest; 60 days if tops are to be fed to animals. Do not enter treated fields within 48 hours after application. Fields must be posted.
* EPA has classified this insecticide as a restricted use pesticide.

 

Sunflowers

INSECTICIDE DOSAGE IN
LB AI/ACRE		 PRODUCT
PER ACRE		 RESTRICTIONS
ON USE
Asana XL* 0.03-0.05 5.8 - 9.6 fl oz Do not apply within 28 days of harvest.
Furadan 4F* 1/8 - 1/2 4 - 8 fl oz Restrictions same as indicated in seed weevil section.
Lorsban 4E 1/2 1 pt Do not apply within 42 days of harvest. Do not allow livestock to graze in treated areas. Do not apply more than 9 pints per acre per season.
6-3-methyl parathion* 1 14 fl oz Do not apply within 30 days of harvesting, pasturing, cutting or foraging. Do not apply more than 3 times at 5 day intervals per season. Do not feed seeds to birds. Do not enter treated fields within 48 hours after application. Fields must be posted.
Sevin XLR 1/2 - 1 1/2 1/2 - 1 1/2 qts Do not apply within 60 days of harvest. Do not allow animals to graze on treated crops.
Scout X-TRA* 0.014-0.0164 2.0-2.33 fl oz Do not apply within 21 days  of harvest.
Warrior* 0.02-0.03 2.56-3.84 fl oz Do not apply within 45 days of harvest.
* EPA has cassified this insecticide as a restricted use pesticide.

 

Non-Cropland (including roadsides):
Vegetation treated with these insecticides cannot be fed to livestock

SITE INSECTICIDE DOSAGE IN LB IA/ACRE PRODUCT PER ACRE RESTRICTIONS
ON USE
Non-crop land (exclusing public land such as forests, parks or recreation areas) Asana XL* 0.015-0.03 2.9-5.8 fl oz Spray non-crop lands adjacent to tilled areas to control migrating insects (grasshoppers, armyworms) which are a threat to crops. Repeat as necessary to maintain control but do not exceed 0.5 lbs.
active ingredient per acre per year. Do not feed treated crop to livestock.  Do not spray ditch banks or areas adjacent to water.
Non-crop areas (field borders, ditchbanks and borrow pits) Orthene 75S 1/4 1/3 lb For early to mid-season application to grasshoppers in field borders, fencerows, roadsides, ditchbanks, and borrow pits. Apply in 1 to 5 gals. of water by air, or in 10 to 20 gals. of water with ground equipment. Use the higher volumes when spraying heavier foliage. Do not graze of feed vegetation cut from treated areas.
*Restricted Use Pesticide

 

Non-Cropland (including roadsides): Allows for livestock feeding.

SITE INSECTICIDE DOSAGE IN LB IA/ACRE PRODUCT PER ACRE RESTRICTIONS
ON USE
Wasteland, rights-of-way, hedgerows, ditch banks, roadsides Sevin XLR Plus 1/2-1 1/2 1/2-1 1/2 qts

Apply a maximum of 2 applications per year.  Allow at least 14 days between applications. Do not allow foraging or cut for hay within 14 days of last application by ground. Aerially treated areas may be grazed or cut for hay on day of treatment. Carefully mark swath to avoid over-application.
Rangeland, pasture, grass grown for seed production, and roadside areas Penncap-M* 1/2-3/4 2-3 pts

Do not apply within 15 days of harvest or grazing. Do not enter treated areas within 48 hours after application. Areas must be posted.
       

Non-agricultural lands Malathion 57 EC 0.9-2 1 1/2 - 3 pts

No time limitation on grazing or cutting.
Clover, pasture, and range grass, grass, grass hay non-agricultural land (watelands, roadsides) Malathion 95% ULV 0.6 8 fl oz

No time limitation on grazing or cutting. Do not apply to clover in bloom.
* Restricted Use Pesticide


CRP

All of the insecticides listed for non-cropland use (previous two tables) can be used on CRP (with applicable restrictions) except Asana. Orthene would be allowable on CRP at rates of 1/8 to 1/6 lb. (0.094 to 0.125 lb. active ingredient) per acre. These rates are lower than the rate shown for non-cropland areas. Orthene has a 21 day preharvest and livestock feeding restriction interval when the 1/8 to 1/6 lb. rates are used.

References

Kemp, W. P. and B. Dennis. 1991. Towards a general model of rangeland grasshopper (Orthoptera: Acrididae) phenology in the steppe region of Montana. Env. Entomol. 20: 1504-1515.

Pfadt, R. E. 1994. Field guide to common western grasshoppers. Wyoming Agric. Exp. Sta. Bulletin 912.

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[ Life Cycle ] [ Damage ] [ Natural Enemies ]
[ Estimating Grasshopper Infestations ] [ Monitoring Hatch Population Development ]
[ Planning Mangement Programs ]
[Cultural Control Methods] [Chemical Control]
[Descriptions of Economically Important Grasshoppers]
[Necessary Precautions in Controlling Grasshoppers]

[ Back to Contents ]

E-272 (Revised), February 1997

 

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