Using Melon Herbicides

Effectively

Barry Tickes

University of Arizona

Yuma Agricultural Center

0

5

10

15

20

19601970

19801990

20002010

Year

Acre

sHerbicide Registrations

Alfalfa

Head Lettuce

Leaf Lettuce

Cole Crops

WheatCotton

Melons

Melon Herbicides

Treflan trifluralin 1967

Prefar bensulide 1968

Dacthal DCPA 1970

Curbit ethafluralin 1994

Poast sethoxydim 1988

Select clethodim 1997

Sandea halosulfuron 2004

Melon Herbicides

Arizona and California

Melon Herbicides

Arizona and California

Dacthal

• 1958 – Registered by Fermenta

• 1990 – Acquired by ISK Biotech Corp.

• 1997 – Manufacturing discontinued

• 2000 – Acquired by Amvac Chemical Corp.

Dacthal

6F 75W

Broadleaf Grass

Seed coat hypocotyl

Primary

root

coleoptile

radicle

Herbicide Adsorption(Koc)

0 2000 4000 6000 8000 10000

Eptam

Kerb

Prefar

Dacthal

Treflan

Balan

Furrow Irrigated Sprinkler Irrigated

Dacthal 8lbs.

Untreated

UntreatedUntreated

0

2

4

6

8

10

12

14

16

0.25 0.325 0.5 0.67 0.75

Weeds (

per

3ft

.)

Water (in.)

Prefar- Water interaction

MON12000 1994

Halosulfuron-methyl

• Sandea(Alfalfa,asperagus,melons,rice,beans,to

matoes,peppers,tree

nuts,sorghum,cotton,corn,sugarcane)

• Permit(corn,fallow,rice,sugarcane,beans)

• Yukon(with dicamba)-corn,sorghum,sugarcane

• SedgeHammer(Turfgrass,landscape)

Sandea 1.0oz.

Untreated

Sandea-Weeds Controlled

Preemergent

Only

Postemergent

Only

Both

Purslane Nutsedge Pigweed

Lambsquarters Sesbania Sunflower

Common Groundsel Nightshade Wild Mustard

Shepardspurse Corn Spurry

Datura Nettleleaf

Goosefoot

No Plastic

Select Max 32 oz. (2X) + 0.25% NIS 4 DAT

End