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Accueil du site → Master → Etats Unis → 1983 → EFFECTS OF FOUR SOIL-APPLIED HERBICIDES ON SHRUB LIVE OAK (QUERCUS-TURBINELLA GREENE) IN ARIZONA

University of Arizona (1983)

EFFECTS OF FOUR SOIL-APPLIED HERBICIDES ON SHRUB LIVE OAK (QUERCUS-TURBINELLA GREENE) IN ARIZONA

Rieger, Nicholas

Titre : EFFECTS OF FOUR SOIL-APPLIED HERBICIDES ON SHRUB LIVE OAK (QUERCUS-TURBINELLA GREENE) IN ARIZONA

Auteur : Rieger, Nicholas

Université de soutenance : University of Arizona

Grade : Master of Science (MS) 1983

Résumé
Picloram, buthidazole, karbutilate, and tebuthiuron were ap plied on one-year old fire-sprouts of shrub live oak (Quercus turbinella Greene). Picloram was applied in both a 5 and 10 percent formulation. Tebuthiuron was the most efficacious herbicide, followed in order by buthidazole, karbutilate, picloram 10 percent, and picloram 5 percent. Tebuthiuron was the only herbicide in which the low rate (2.2A kg/ha) was as effective as the two higher rates (4.48 and 8.96 kg/ha). Tebu thiuron and karbutilate were applied in summer and winter treatments on one-year old fire-sprouts and mature-brush shrubs. On fire-sprouts, karbutilate was more effective when applied in the winter versus summer applications, however, no difference occurred between seasons for tebu thiuron. On mature-brush, no difference occurred between seasons for either herbicide. Karbutilate and tebuthiuron were more effective on fire-sprouts than on mature-brush. Burning helped reduce the amount of tebuthiuron needed to control shrub live oak

Mots clés : Live oak — Toxicology — Arizona. ; Plants — Effect of herbicides on. ; Herbicides — Toxicology — Arizona. ; Chaparral ecology — Arizona.

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Page publiée le 4 février 2016, mise à jour le 16 février 2018