Variable tolerance of some crop species to atrazine in various soils
作者:
ReinhardtC.F.,
NelP.C.,
期刊:
South African Journal of Plant and Soil
(Taylor Available online 1993)
卷期:
Volume 10,
issue 4
页码: 183-187
ISSN:0257-1862
年代: 1993
DOI:10.1080/02571862.1993.10634668
出版商: Taylor&Francis Group
关键词: Atrazine;carry-over;crop sensitivity;tolerance
数据来源: Taylor
摘要:
The carry-over of atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-s-triazine), which occasionally causes damage to susceptible crops grown in rotation with atrazine-treated maize (Zea maysL.), calls for a refinement of the specified recropping intervals. Bioassays were conducted in a glasshouse to evaluate, with nine soils, the tolerance to atrazine shown by dry beans (Phaseolus vulgarisL. cv. Teebus), grain sorghum (Sorghum bicolor(L.) Moench cv. NK222), oats (Avena sativaL. cv. SWK001), soybeans (Glycine max(L.) Merr. cv. Forrest) and sunflower (Helianthus annuusL. cv. S0222). Significant differences between the tolerance of test species in experiments where dry beans/sunflower and oats/soybean combinations were evaluated are inconsistent with the single recrop interval that is stipulated for all four species. The amount of atrazine that was required to elicit a significant response from a particular test crop varied from soil to soil. The variable availability of atrazine in different soils for uptake by crop species needs to be considered to limit the risk when a sensitive follow-up crop is selected for a soil in which the amounts of toxic atrazine residues are known.
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