Vol. 16â1962 - NorthEastern Weed Science Society
Vol. 16â1962 - NorthEastern Weed Science Society Vol. 16â1962 - NorthEastern Weed Science Society
54 DIPHEIUHID FOR PRE..Ei,ERGENTvJEE£ CONTROL IN HORTICULTURALCROPS E. F. Alder and W. L. Wright Diphenamid is the tentative common name for N,N-dimethyl-ct,ttdiphenylacetamide. Last year at the regional weed conferences we first reported the selective herbicida1.-propert:l:.esof thie compound and other substituted diphenylace,amrdes (1,2,3). Confirmatory eVidence has subsequently been'published (4). Diphenamid is an effective pre_emergent herbicide against annual weed grasses and several annual broadlea! weeds. It has shown useful selectivity in several horticultural crops. A list of crops which have been tolerant to diphenamid at rates through eight pounds per acre is presented in Table 1. Table 1. Crolls Tolerant to Diphenamid at 8.lb/A - - - ~ - - ~ - - ~ - - - - tomatoes (seeded and Peppers (seed4d and Strawberries Snapbeans Lima beans Peas ,Potatoes, Irish Potatoes, Sweet transplant) transplant) Cabbage Nustard Radishes Turnip •. l Kohlrabi Rutabaga A list of weeds classified according to their susceptibility to diphenamid at rates of four tq six pounds p,r acre is presented in Table 2. Diphenamid has given excellent control of most annual grass ~eeds tested. Broadleaf weed control has been promising but variable. Rainf.ll or irrigation'soon after treatment improved 'the broadleat weed control perto'rmance of diphenamid. 1. Contribution of Eli Lilly and Co., Gre~nfield Laboratorie~, Greenfield, Indiana 2. Head, Plant Science Research, and Plant Physiologist, respectively
~ ~_~ __ L L Table 2. Weed Susceotibility to Diphenamid at 4-6 lb/A 55 Susceptible ------ Crabgrasses Foxtails Barnyardgrass Goosegrass Stinkgrass Cheat Pigweed Lambsquarters Carpetweed Chickweed l-loderately Susceptible Wild oats Fall panicum Ragweed Smartweed Wild mustard Purslane Tolerant Jimsonweed Velvetleaf Venice mallo.r Field Tests Tomatoes Diphenamid was applied to field-seeded and transplant tomatoes in 33 experiments at Greenfield, Indiana and at other Indiana locations. A. total of ten varieties of field-seeded and transplant tomatoes were tested. Spray applications were made with either a modif~ed Hahn Hi-Boy sprayer or a ~~lky spray unit. Plot sizes varied in the different experimehts but were usually greater than 50 square feet. Weed control wa~ determined by counts or visual ratings. Table 3 presents data from a typical pre-emergent experiment on field-seeded tomatoes. Application was made immediately after seeding the tomatoes. Grass weeds were large crabgrass and yellow foxtail. Table 4 presents typical data from an experiment on transplant tomatoes. In this experiment diphenamid was applied as an overtop treatment on the transplants pre-emergence to the weeds. Grass weeds were large crabgrass and yellow foxtail; broadleaves were pigweed, lambsquarters, smartweed, and ragweed. In all tests, four pounds per acre was adequate for weed control on light soils. Six pounds per acre was needed for heavy soils. On heavy soils, field-seeded and transplant tomatoes were not d.amaged by diphenamid at rates through fifteen pounds per acre. In one experiment of the fiv~ experiments oonducted on sandy soils,.moderate early injury to the tomatoes was noted at the ten pound rate. A. month later this damage had disappeared. Final yields were not reduced in any of the experiments. It is apparent .~~+ A~_~_~~_~~ ~ __ft~_ ~_ ~ __ ~_ ~ ' __ ~ L _
- Page 3 and 4: Complete reports from 12 Nor~heaste
- Page 5 and 6: The reawakening in aquatic weed con
- Page 7 and 8: ,10.1ng -2,4.,;iD (19), 2,4~5.T (4)
- Page 9 and 10: 9 The Role of the State in Res idue
- Page 11 and 12: ,., 1'4 keep developmental work in
- Page 13 and 14: In addition to a review of field an
- Page 15 and 16: State workers have to consider resi
- Page 17 and 18: The vigorous regrowth of quackgrass
- Page 19 and 20: during t,he sUllllller.is l,ower ll
- Page 21 and 22: 5. llslapon and other chlorine,ted
- Page 23 and 24: 23 • ·i INTRODUCTION: !!'he Bear
- Page 25 and 26: Some damage to runners rssul ted fr
- Page 27 and 28: 27 CELLSTRUCTUREANDPLANTGROWTHCRMON
- Page 29 and 30: pel'fQ.,..d,-.ear17M1932. that the
- Page 31 and 32: a copious precipitate deposits afte
- Page 33 and 34: B) A general review of the subject
- Page 35 and 36: This narrative of ineptitude must b
- Page 37 and 38: does Jo run a recreational facility
- Page 39 and 40: Another pote1U:ialuse for chemicals
- Page 41 and 42: Newapproaches in the use of herbici
- Page 43 and 44: 43 sentence would bear this out". T
- Page 45 and 46: More and more each year since the a
- Page 47 and 48: 11. Rice, E. J. The effects of cUlt
- Page 49 and 50: PFSI'ICIDESUSED - - - - - - - - - -
- Page 51 and 52: __..:I whether or not these apparen
- Page 53: Dosage. Ib./acre Dimethyl tetrachlo
- Page 57 and 58: - - - - - - - - ~, - - - - --- - -
- Page 59 and 60: Table 7.. Weed Control in :l:!c,Ql1
- Page 61 and 62: Table '1. Rat.1lISstI 'Of carrot an
- Page 63 and 64: H , 'ta~l!. g,._~e~_O!~ut~• .:.:.
- Page 65 and 66: 65 plant press and dried in a f~ced
- Page 67 and 68: 67 Tablet. 'lIi! EFFECT'or AN'INO'l
- Page 69 and 70: 69 THE INFLUENCE JIt P.I!ll'ROLEUM
- Page 71 and 72: 71 1 CDEC(Ee) 2 " " 3 4 " 5 " " 6 7
- Page 73 and 74: !a~l~ 1._ ~!:.c!: :!!1~hJl!:e.::m~d
- Page 75 and 76: 75 EFFECT;OFCOMPOSITIONANDVOLUMEOF
- Page 77 and 78: A LOGARITHMICSPRAlERFORSMALLPLCflSY
- Page 79 and 80: 79 Do~ Calculations The actual init
- Page 81 and 82: Selective Herbicides for Several Cr
- Page 83 and 84: 83 Susceptible weeds Tolerant weeds
- Page 85 and 86: 85 Marion Market 9 9 9 9 9 9 9 9 Da
- Page 87 and 88: Table 5. Bai
- Page 89 and 90: weeding of Lima Bean. With Chemical
- Page 91 and 92: EFFECTOF HERBICIDESONQUALITYANDYIEL
- Page 93 and 94: Results Date treated: 9/6/61 Soil m
- Page 95 and 96: 95 Date planted: 915/61 Date treate
- Page 97 and 98: Table 3. Yield Data on Hanover and
- Page 99 and 100: Weeding of Carrots With 'pre-lilanU
- Page 101 and 102: 101 WEEDCONTROLSTUDIESIN SEElED ONI
- Page 103 and 104: Weather conditions at the two locat
54<br />
DIPHEIUHID FOR PRE..Ei,ERGENTvJEE£ CONTROL<br />
IN HORTICULTURALCROPS<br />
E. F. Alder and W. L. Wright<br />
Diphenamid is the tentative common name for N,N-dimethyl-ct,ttdiphenylacetamide.<br />
Last year at the regional weed conferences<br />
we first reported the selective herbicida1.-propert:l:.esof thie<br />
compound and other substituted diphenylace,amrdes (1,2,3).<br />
Confirmatory eVidence has subsequently been'published (4).<br />
Diphenamid is an effective pre_emergent herbicide against annual<br />
weed grasses and several annual broadlea! weeds. It has shown<br />
useful selectivity in several horticultural crops. A list of<br />
crops which have been tolerant to diphenamid at rates through<br />
eight pounds per acre is presented in Table 1.<br />
Table 1. Crolls Tolerant to Diphenamid at 8.lb/A<br />
- - - ~ - - ~ - - ~ - - - -<br />
tomatoes (seeded and<br />
Peppers (seed4d and<br />
Strawberries<br />
Snapbeans<br />
Lima beans<br />
Peas<br />
,Potatoes, Irish<br />
Potatoes, Sweet<br />
transplant)<br />
transplant)<br />
Cabbage<br />
Nustard<br />
Radishes<br />
Turnip •. l<br />
Kohlrabi<br />
Rutabaga<br />
A list of weeds classified according to their susceptibility to<br />
diphenamid at rates of four tq six pounds p,r acre is presented<br />
in Table 2. Diphenamid has given excellent control of most<br />
annual grass ~eeds tested. Broadleaf weed control has been<br />
promising but variable. Rainf.ll or irrigation'soon after treatment<br />
improved 'the broadleat weed control perto'rmance of diphenamid.<br />
1. Contribution of Eli Lilly and Co., Gre~nfield Laboratorie~,<br />
Greenfield, Indiana<br />
2. Head, Plant <strong>Science</strong> Research, and Plant Physiologist,<br />
respectively
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