Control of barley grass

Thompson, F.B.

doi:10.30843/nzpp.1964.17.10288

Cited by 2 publications

(2 citation statements)

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“…At application rates between 0-12 and 0-5 lb/ac, however, response was inversely proportional to the amount of top growth present when the sprays were applied. This response parallels the experience of Merry (1960) and Thompson (1962) who consider grazing before spraying with daiapon an essential feature ofa control programme. Top growth was removed before spraying in the 1962 experiments because of these results.…”

Section: Effect On Hordeum Leporinumsupporting

confidence: 73%

“…Recendy, however, promising eontrol of barley grass has been obtained with paraquat (Thompson, 1962;Squires, 1963) which has been reported also to eliminate Poa trivialis L. from lucerne stands (Jones, 1962a). The ability to suppress grass, together with absence of residual activity (Cronshey, 1961;Jones, 1962) suggest paraquat as an alternative to daiapon on southern Australian pastures.…”

Section: Introductionmentioning

confidence: 99%

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Selective Herbicidal Control of Barley Grass in Pasture and Lucerne

Cuthbertson

1964

Weed Research

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Comparative experimental re.sults with dalapon-sodium and paraquat for the control of barley grass {Hordeum leporinum Link) in lucerne and subterranean clover pasture are reported. Sprays were applied 3-4 days after a simulated grazing..\t all rates tested (1-4 Ib/ac), dalapon provided satisfactory control of, but did not eradicate, barley grass. Subterranean clover productivity was reduced substantially whether application was in May or July; lucerne growth was retarded by 4 Ib/ac applieti in July.Paraquat applied at 0-06-0-25 Ib/ac in May gave similar bul somewhat less effective control than did dalapon. Some re-establishment of barley grass occurred as a result of late germinations following the May applications. Paraquat applied in July ai 0-06 Ib/ae gave unsatisfactory results, bui at 0-12 and 0-25 Ib/ac the control was comparable with that given by dalapon. Subterranean clover was damaged slightly by the May treatments but recovered quickly, after initial scorching, following applications in July. Lucerne was neither damaged nor retarded by paraquat.The addition of a wetting agent increased the efficacy of paraquat in controlling certain more tolerant annual grasses, but not barley grass. Dhherbage sHeclif des pdtures el des luzerrus: lutU conlre I'orge des liivresResume. L'auteur rapporte les rdsultats obtenus dans des experiences mettant en comparaison le dalapon sel de sodium et le paraquat pour la luite contre I'orge des liivres {Hordeum leporinum Link] dans la luzenie et des paturages de trifle souterrain. Les traitements ont ^te appHqu^s 3-4 jours apr^s une pature simul^e.A toutes les doses essayees (1,1^,4 kg/ha) le dalapon a donnd un d^sherbage satisfaisant mais pas une destruction complete de I'orge des iievres. La productivite du trcfle souterrain fut notablement r^uite, que le traitement ait 6i6 effectu^ en mai ou en juillet; la croissance de la luzeme fut relardee par une dose de 4,4 kg/ha appliquie en juillet.La paraquat appHqu^ de 0,07 k 0,28 kg/ha en mai, donna des rtsultats similaires bien que l^g^rement infdrieurs a ceux obtenus avec le dalapon.Une r^infestation d'orge des Iievres fut observ^e, resultant des germinations apr^s les traitements de mai. Le paraquat appliqu^ en juillet a 0,07 kg/ha ne donna pas de r^sultats satisfaisants, mais & 0,13 et 0,28 kg/ha le d^sherbage fut comparable k celui obtenu avec le dalapon.Le trefle souterrain fut endommage Increment par les traitements de mai; il r^cuptfra rapidement apr^s une reaction initiate, a la suite des applications en juillet. La luzerne ne fut ni endommag^e ni retardde par le paraquat.L'addition d'un mouillant aecrut I'efficacild du paraquat contre certaines gramin^es annuelles moins sensibles, mais pas contre I'orge des Iievres. Bekampfung von Hordeum leporinum auf Weiden und in Luzeme Zusammenfassung. Es wird tiber Versuche zur Bekampfung von Hordeum leporinum Link in Luzerne und auf Weiden mit Paraquat und dem Natriumsalz des Dalapon berichtet. Gespritzt wurde drei bis vier Tage nach simulierter Beweidung. Bei alien untersucbten Au...

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Section: Effect On Hordeum Leporinumsupporting

confidence: 73%