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Title: Toxicity, absorption, translocation, and metabolism of chlorimuron in yellow and purple nutsedge (Cyperus esculentus and C. rotundus)

Abstract

Greenhouse, laboratory, and field studies were conducted to investigate the activity of soil and foliar applied chlorimuron on yellow and purple nutsedge. Soil-applied chlorimuron (10 to 60 g/ha) significantly decreased tuber sprouting, shoot emergence, and shoot growth in both yellow and purple nutsedge. Previous exposure to soil-applied chlorimuron was not effective in reducing parent tuber sprouting at any rate in yellow nutsedge, while in purple nutsedge parent tuber sprouting was reduced significantly at 60 g/ha. Shoots of both yellow and purple nutsedge propagules absorbed greater amounts of /sup 14/C than did roots and tubers. However, translocation of /sup 14/C was greater from the roots and tuber than from the shoot. Toxicity of foliar-applied chlorimuron (5 to 30 g/ha) was evident by stunted growth, leaf discoloration, and death in both species. Application of chlorimuron at 20 g/ha gave 84% control in yellow nutsedge and 100% control in purple nutsedge. Chlorimuron treatments reduced shoot dry weight, inhibited secondary shoot production, and killed parent tubers attached to treated plants, regardless of rats, in both species. Over 13% of the foliar-applied /sup 14/C recovered was absorbed and over 15% of that absorbed was translocated at 1 day after application in both species. This increasedmore » two-fold by 8 days after application. /sup 14/C translocation was both acropetal and basipetal. Over 68% of the absorbed /sup 14/C in yellow nutsedge and 63% in purple nutsedge was retained in the treated area at 8 days after application. Overall, the basal bulb, rhizomes, and tuber had the least amounts of /sup 14/C in both species.« less

Authors:
Publication Date:
Research Org.:
Ohio State Univ., Columbus (USA)
OSTI Identifier:
6999930
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; HERBICIDES; FOLIAR UPTAKE; ROOT ABSORPTION; TOXICITY; TRANSLOCATION; BENCH-SCALE EXPERIMENTS; CARBON 14 COMPOUNDS; FIELD TESTS; GREENHOUSES; INHIBITION; PLANT GROWTH; SOILS; SPROUTING; TRACER TECHNIQUES; WEEDS; ABSORPTION; BUILDINGS; GROWTH; ISOTOPE APPLICATIONS; LABELLED COMPOUNDS; PESTICIDES; PLANTS; TESTING; UPTAKE; 551001* - Physiological Systems- Tracer Techniques

Citation Formats

Reddy, K.N. Toxicity, absorption, translocation, and metabolism of chlorimuron in yellow and purple nutsedge (Cyperus esculentus and C. rotundus). United States: N. p., 1987. Web.
Reddy, K.N. Toxicity, absorption, translocation, and metabolism of chlorimuron in yellow and purple nutsedge (Cyperus esculentus and C. rotundus). United States.
Reddy, K.N. Thu . "Toxicity, absorption, translocation, and metabolism of chlorimuron in yellow and purple nutsedge (Cyperus esculentus and C. rotundus)". United States.
@article{osti_6999930,
title = {Toxicity, absorption, translocation, and metabolism of chlorimuron in yellow and purple nutsedge (Cyperus esculentus and C. rotundus)},
author = {Reddy, K.N.},
abstractNote = {Greenhouse, laboratory, and field studies were conducted to investigate the activity of soil and foliar applied chlorimuron on yellow and purple nutsedge. Soil-applied chlorimuron (10 to 60 g/ha) significantly decreased tuber sprouting, shoot emergence, and shoot growth in both yellow and purple nutsedge. Previous exposure to soil-applied chlorimuron was not effective in reducing parent tuber sprouting at any rate in yellow nutsedge, while in purple nutsedge parent tuber sprouting was reduced significantly at 60 g/ha. Shoots of both yellow and purple nutsedge propagules absorbed greater amounts of /sup 14/C than did roots and tubers. However, translocation of /sup 14/C was greater from the roots and tuber than from the shoot. Toxicity of foliar-applied chlorimuron (5 to 30 g/ha) was evident by stunted growth, leaf discoloration, and death in both species. Application of chlorimuron at 20 g/ha gave 84% control in yellow nutsedge and 100% control in purple nutsedge. Chlorimuron treatments reduced shoot dry weight, inhibited secondary shoot production, and killed parent tubers attached to treated plants, regardless of rats, in both species. Over 13% of the foliar-applied /sup 14/C recovered was absorbed and over 15% of that absorbed was translocated at 1 day after application in both species. This increased two-fold by 8 days after application. /sup 14/C translocation was both acropetal and basipetal. Over 68% of the absorbed /sup 14/C in yellow nutsedge and 63% in purple nutsedge was retained in the treated area at 8 days after application. Overall, the basal bulb, rhizomes, and tuber had the least amounts of /sup 14/C in both species.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Thesis/Dissertation:
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