Lentils
Joe Yenish
Reviewed December 2, 2008

LENTILS—Wild Oat
Preplant or preemergence
•  triallate (Far-Go)
Rate  1.5 lb ai/A
Time  Apply preplant or postplant; incorporate thoroughly 1 to 2 inches deep.
Remarks  Do not graze treated areas.
Site of action  Group 8: lipid synthesis inhibitor but not an ACCase inhibitor
Chemical family  Thiocarbamate
LENTILS—Annual Grass and Broadleaf Weeds
Preplant incorporated
•  trifluralin (Trilin)
Rate  0.5 to 0.875 lb ai/A
Time  Apply preplant and incorporate. May be fall applied.
Remarks  Incorporate thoroughly 1 to 2 inches deep immediately after applying. Use lower rate on coarse soil.
Caution  May injure stressed crop seedlings.
Site of action  Group 3: microtubule assembly inhibitor
Chemical family  Dinitroaniline
Preplant incorporated or preemergence
•  S-metolachlor (Dual Magnum)
Rate  0.95 to 1.91 lb ai/A (1 to 2 pints/A Dual Magnum)
Time  Apply preplant incorporated or preemergence.
Remarks  Application rate depends on soil type and organic-matter content.
Caution  Do not cut for hay within 120 days after application.
Site of action  Group 15: inhibits very long chain fatty acid synthesis
Chemical family  Chloroacetamide
Preplant or preemergence or early postemergence
•  dimethenamid-P (Outlook)
Rate  Outlook—0.56 to 0.98 lb ai/A (12 to 21 oz/A)
Time  Apply preplant or preemergence or early postemergence.
Remarks  Consult label for application rate in relation to soil type. Use lower rate on coarse soils with low organic matter or low cation exchange capacity (CEC). Control is best if incorporated into soil by overhead moisture or a light tillage (1 to 2 inches deep) before weed seedlings emerge. Do not apply Outlook early postemergence.
Caution  Do not apply through any type of irrigation system. To avoid injuring sensitive varieties, before applying Outlook consult your local seed company supplier about your variety’s sensitivity.
Site of action  Group 15: inhibits very long chain fatty acid synthesis
Chemical family  Chloroacetamide
LENTILS—Annual Grasses
Preplant 
•  pendimethalin (Prowl 3.3EC or Prowl H2O)
Rate  0.5 to 1.5 lb ai/A (1.2 to 3.6 pints/A Prowl 3.3EC; 1.5 to 3 pints/A Prowl H2O). Use lower rate on coarse soils, higher rate on fine soils.
Time  Apply up to 60 days preplant and incorporate by following label instructions.
Remarks  Incorporate thoroughly 1 to 2 inches deep. Apply in at least 10 gal/A water or in 20 gal/A or more liquid fertilizer. Also controls several broadleaf weed species.
Caution  Do not apply to pea or lentil forage, silage, hay, or straw grown for feed.
Site of action  Group 3: microtubule assembly inhibitor
Chemical family  Dinitroaniline
Postemergence
•  sethoxydim (Poast)
Rate  0.19 to 0.47 lb ai/A (1 to 2.5 pints/A Poast)
Time  Apply to wild oat  and volunteer cereals up to 4 inches tall and to other grasses according to label.
Remarks  Refer to label for specific herbicide rates, weed species, and weed size. Always add a nonphytotoxic oil concentrate at 2 pints/A.
Caution  Control is erratic on grasses stressed by drought, temperature extremes, herbicide injury, or other factors. Do not apply if rain is expected within 1 hr of application. Do not mix with other pesticides. Do not exceed 0.75 lb ai/A in one season. Preharvest interval is 50 days.
Site of action  Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family  Cyclohexanedione
•  quizalofop P-ethyl  (Assure II)
Rate  0.04 to 0.08 lb ai/A (6 to 12 fl oz/A Assure II)
Time  Postemergence to grasses. See label for details.
Remarks  Controls both annual and perennial grasses. Always use either a nonionic surfactant at 1 quart/100 gal or a petroleum-based crop oil at 1 gal/100 gal.
Caution  Do not exceed 14 fl oz/A per season. Preharvest interval is 60 days. Do not feed vines or hay.
Site of action  Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family  Aryloxyphenoxy propionate
•  clethodim (several trade names) 
Rate  Annual grasses—use 0.068 to 0.121 lb ai/A (9 to 16 fl oz/A Select Max); perennial grasses—use 0.091 to 0.242 lb ai/A 
(12 to 32 fl oz/A Select Max)
Time  Apply postemergence to actively growing grasses. See label for details.
Remarks  Apply with an approved nonionic surfactant at 0.25% v/v.
Caution  Do not exceed 32 fl oz/A per application or 64 fl oz/A per year. Preharvest interval is 30 days. Allow at least 14 days between retreatments.
Site of action  Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family  Cyclohexanedione
LENTILS—Annual Broadleaf Weeds
Preplant
•  pendimethalin (Prowl)
Rate  0.5 to 1.5 lb ai/A (1.2 to 3.6 pints/A Prowl)
Time  Apply preplant and incorporate.
Remarks  Incorporate thoroughly 1 to 2 inches deep after applying. Use lower rate on coarse soil.
Caution  Do not apply to pea or lentil forage, silage, hay, or straw grown for feed.
Site of action  Group 3: microtubule assembly inhibitor
Chemical family  Dinitroaniline
Preplant incorporated or preemergence
•  imazethapyr (Pursuit)
Rate  0.047 Ib ai/A (3 oz/A Pursuit or 1.08 oz/A of the 70% DG)
Time  Apply preplant incorporated within 1 wk of planting. Do not incorporate more than 3 inches deep. Apply preemergence after planting but before crop emerges. Application may be followed by shallow incorporation to improve control.
Remarks  May be tank-mixed with metribuzin to help control lambsquarters or mayweed. Rain required to move surface applications into weed germination zone. If adequate moisture is not received within 7 days of application, control escaped weeds with rotary hoeing or cultivation.
Caution  Wheat and barley may be planted 4 mo after last application. Do not feed treated lentil hay or straw to livestock.
Site of action  Group 2: acetolactate synthase (ALS) inhibitor
Chemical family  Imidazolinone
Preemergence
•  metribuzin (Sencor)
Rate  0.19 to 0.38 lb ai/A (4 to 8 oz/A of the 75% DF)
Time  Apply after seeding but before lentils germinate. Metribuzin may be incorporated 1 to 2 inches deep if soil is dry. If moisture is present or expected, preemergence treatment is best. 
Remarks  Will not control nightshade.
Caution  Determine your lentil variety’s tolerance before applying metribuzin. See other label precautions. Do not use on coarse soils or on any soil with less than 1.5% organic matter. Do not use on clay knobs or poorly covered subsoils. Crop may be injured if it becomes stressed. Follow label regarding crop rotations. Do not exceed one application or 0.66 lb/A Sencor 75DF per season. Do not apply on seeds planted less than 2 inches deep. Preharvest interval is 75 days.
Site of action  Group 5: photosystem II inhibitor
Chemical family   Triazine
Postemergence
•  metribuzin (Sencor)
Rate  0.15 to 0.25 lb/A (2.67 to 5.3 oz/A of the 75% DF)
Time  Apply to weeds less than 2 inches high and before lentils are 6 inches high.
Remarks  Will not control nightshade.
Caution  Do not use on coarse soils or on soils with less than 1.5% organic matter. Do not use on clay knobs or poorly covered subsoils. Crop symptoms may appear, especially under moist conditions. Use the low rate when conditions are moist. Do not apply more than once preemergence and once postemergence per season. Do not apply over moist soils, wet foliage, or within 3 days of cool, wet weather. Do not exceed 0.66 lb/A Sencor 75 DF per year. Preharvest interval is 75 days.
Site of action  Group 5: photosystem II inhibitor
Chemical family  Triazine
Harvest aid
•  paraquat (Gramoxone Inteon)
Rate  0.3 to 0.5 lb ai/A (1.2 to 2 pints/A)
Time  Apply when crop is mature; i.e., at least 80% of pods are yellowing and mostly ripe 
Remarks  Use with a nonionic surfactant, crop oil concentrate, or methylated seed oil.
Caution  A restricted-use herbicide. Do not allow to drift from target site.
Site of action  Group 22: photosystem I electron diversion
Chemical family  Bipyridilium
•  glyphosate (several trade names) 
Rate  Up to 2.25 glyphosate ae/A (product rate will vary)
Time  Apply to mature crop
Remarks  Preharvest interval is 7 day for broadcast treatments, 14 days for spot treatments.
Caution  Only certain formulations are labeled. See label. See label for adjuvant use.
Site of action  Group 9: inhibits EPSP synthase 
Chemical family  None generally accepted

Garbanzo Beans (Chickpeas)
Joe Yenish
Revised December 2, 2008
GARBANZO BEANS—Wild Oat
Preplant or preemergence
•  triallate (Far-Go)
Rate  1.25 lb ai/A (1.25 quarts/A Far-Go)
Time  Apply preplant or postplant; incorporate thoroughly 1 to 2 inches deep.
Remarks  Do not graze treated area.
Site of action  Group 8: lipid synthesis inhibitor but not an ACCase inhibitor
Chemical family  Thiocarbamate
GARBANZO BEANS—Annual Grass and Broadleaf Weeds
Preplant incorporated or preemergence
•  S-metolachlor (Dual Magnum)
Rate  0.95 to 1.91 lb ai/A (1 to 2 pints/A Dual Magnum)
Time  Apply preplant incorporated or preemergence.
Remarks  Application rate depends on soil type and organic-matter content.
Caution  Do not cut for hay within 120 days after application.
Site of action  Group 15: inhibits very long chain fatty acid synthesis
Chemical family  Chloroacetamide
•  imazethapyr (Pursuit)
Rate  0.047 lb ai/A (3 oz/A Pursuit or 1.08 oz/A of the 70% DG)
Time  Apply preplant incorporated within 1 wk of planting. Do not incorporate more than 3 inches deep. Apply preemergence after planting but before crop emerges. Application may be followed by shallow incorporation to improve control.
Remarks  May be tank-mixed with metribuzin to help control lambsquarters or mayweed. Rain required to move surface applications into weed germination zone. If adequate moisture is not received within 7 days of application, control escaped weeds with rotary hoeing or cultivation.
Caution  Wheat and barley may be planted 4 mo after last application. Do not feed treated garbanzo bean hay or straw to livestock.
Site of action  Group 2: acetolactate synthase (ALS) inhibitor
Chemical family  Imidazolinone
•  pendimethalin (Prowl 3.3EC or Prowl H2O)
Rate  0.5 to 1.5 lb ai/A (1.2 to 3.6 pints/A Prowl 3.3EC or 1.5 to 3 pints/A Prowl H2O). Use lower rate on coarse soils, higher rate on fine soils.
Time  Apply up to 60 days preplant and incorporate as label instructs. May be applied preplant incorporated only to garbanzo beans.
Remarks  Incorporate thoroughly 1 to 2 inches deep. Apply in at least 10 gal/A water or in 20 gal/A or more liquid fertilizer.
Caution  Do not apply to pea, lentil, or garbanzo bean forage, silage, hay, or straw grown for feed.
Site of action  Group 3: microtubule assembly inhibitor
Chemical family  Dinitroaniline
•  trifluralin (Treflan, Trilin, or others)
Rate  0.5 to 0.875 lb ai/A 
Time  Apply preplant and incorporate. May be applied in fall.
Remarks  Incorporate thoroughly 2 to 3 inches deep immediately after applying. Use lower rate on coarse soils.
Caution  May injure stressed crop seedlings.
Site of action  Group 3: microtubule assembly inhibitor
Chemical family  Dinitroaniline
 GARBANZO BEANS—Annual Broadleaf Weeds
Preplant or preemergence
•  sulfentrazone (Spartan 4F)
Rate  0.07 to 0.25 lb ai/A (2.25 to 8 fl oz/A Spartan 4F)
Time  Apply fall or spring as preplant, preemergence, or preplant incorporated. 
Remarks  Consult label to determine rate for soil pH, percentage of organic matter, and texture.
Caution  Do not exceed 8 fl oz/A Spartan 4F per 12-mo period. Do not apply after crop emerges or if seedlings are near soil surface. 
Site of action  Group 14: protoporphyrinogen oxidase inhibitor
Chemical family  Triazinone
•  flumioxazin  (Valor SX)
Rate  0.048 lbs ai/A (1.5 oz/A Valor SX)
Time  Apply before planting or within 2 days after planting but before crop emerges.
Remarks  Preplant incorporation applications may result in reduced weed control. Valor is labeled for weed suppression in garbanzo, not control.
Caution  Do not exceed 1.5 oz/A in a single application or 1.5 oz/A in a single growing season.
Site of action  Group 14: protoporphyrinogen oxidase inhibitor
Chemical family  N-phenylphthalimide
Preemergence
•  metribuzin (Sencor)
Rate  0.25 to 0.38 lb ai/A (5.3 to 8 oz/A of the 75% DF Sencor)
Time  Apply after planting but before crop germinates.
Remarks  Will not control nightshade.
Caution  Determine your chickpea variety’s tolerance before applying metribuzin. See other label precautions. Do not use on coarse soils or if organic matter is less than 1.5%. Do not use on clay knobs or poorly covered subsoils. Crop may be injured if stressed. Follow label about crop rotations. Do not apply more than once per season. Do not apply if seeding depth is less than 2 inches.
Site of action  Group 5: photosystem II inhibitor
Chemical family  Triazine
•  dimethenamid-P (Outlook)
Rate   0.56 to 0.98 lb ai/A (12 to 21 oz Outlook/A).
Time  Apply preplant, preemergence, or early postemergence.
Remarks  Consult label for application rate in relation to soil type. Use lower rate on coarse soils with low organic matter or low cation exchange capacity (CEC). Control is best if incorporated into soil by overhead moisture or a light tillage (1 to 2 inches deep) before weed seedlings emerge. Do not apply Outlook early postemergence.
Caution  Do not apply through any irrigation system. To avoid injuring sensitive varieties, before applying Outlook consult your local seed company supplier about your variety’s sensitivity.
Site of action  Group 15: inhibits very long chain fatty acid synthesis
Chemical family  Chloroacetamide
GARBANZO BEANS—Annual Grass Weeds
Postemergence
•  clethodim (several trade names) 
Rate  Annual grasses—use 0.068 to 0.121 lb ai/A (9 to 16 fl oz/A Select Max); perennial grasses—use 0.091 to 0.242 lb ai/A (12 to 32 fl oz/A Select Max)
Time  Apply postemergence to actively growing grasses. See label for details.
Remarks  Apply with an approved nonionic surfactant at 0.25% v/v.
Caution  Do not exceed 32 fl oz/A per application or 64 fl oz/A per year. Preharvest interval is 30 days. Allow at least 14 days between retreatments.
Site of action  Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family  Cyclohexanedione
•  quizalofop P-ethyl  (Assure II)
Rate  0.04 to 0.08 lb ai/A (6 to 12 fl oz/A Assure II)
Time  After grasses emerge; see label for details.
Remarks  Controls both annual and perennial grasses. Always use either a nonionic surfactant at 1 quart/100 gal or a petroleum-based crop oil at 1 gal/100 gal.
Caution  Do not exceed 14 fl oz/A per season. Preharvest interval is 60 days. Do not feed vines or hay.
Site of action  Group 1: acetyl CoA carboxylase (ACCase) inhibitor
Chemical family  Aryloxyphenoxy propionate
GARBANZO BEANS—Harvest Aid
•  paraquat (Gramoxone Inteon) 
Rate  0.3 to 0.5 lb ai/A (1.2 to 2 pints/A)
Time  Apply when crop is mature; i.e., at least 80% of pods are yellowing and mostly ripe, and no more than 40% (bush-type) or 30% (vine-type) of leaves still green.
Remarks  Apply in 20 to 40 gal/A water by ground or in at least 5 gal/A water by air. Add a nonionic surfactant at 1 quart/100 gal spray mix. On vine-type or bush-type beans with lush and vigorous growth, use a single application at the higher rate. May also be applied as a split application to improve vine coverage. Do not exceed two applications or a total of 2 pints/A.
Caution  A restricted-use herbicide. Do not use on fava beans or faba beans. Do not exceed two applications or 0.47 lb ai/A (1.5 pints/A). Follow all safety precautions on label. Preharvest interval is 7 days.
Site of action  Group 22: photosystem I electron diversion
Chemical family  Bipyridilium
•  glyphosate (several trade names) 
Rate  Up to 2.25 glyphosate ae/A (product rate will vary)
Time  Apply to mature crop
Remarks  Preharvest interval is 7 days for broadcast treatments, 14 days for spot treatments.
Caution  Only certain formulations are labeled. See label. See label for adjuvant use.
Site of action  Group 9: inhibits EPSP synthase 
Chemical family  None generally accepted
•  flumioxazin  (Valor SX)
Rate  Up to 0.096 lb/A flumioxazin (3 oz/A Valor)
Time  Apply to mature crop
Remarks   Preharvest interval is 5 days. To ensure thorough coveragem use 15 to 30 gal/A spray solution. Select a nozzle that meets manufacturer’s gallonage and pressure recommendations for postemergence application. Desiccation from Valor requires adding an agronomically approved adjuvant to the spray mixture, either a crop oil concentrate or methylated seed oil that contains at least 15% emulsifiers and 80% oil at 2% v/v. A spray-grade nitrogen source (either ammonium sulfate at 2 to 2.5 lb/A or a 28% to 32% nitrogen solution at 1 to 2 quarts/A) may be added to the spray mixture along with either a crop oil concentrate or methylated seed oil to enhance desiccation. Adding a nitrogen source does not replace the need for a crop oil concentrate or a methylated seed oil. Tank-mixing Valor with glyphosate increases control of emerged weeds and aids in harvest.
Caution  Do not exceed 3 oz/A during a single growing season.
Site of action  Group 14: protoporphyrinogen oxidase inhibitor
Chemical family  N-phenylphthalimide
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