Title:	Persistence of picloran in Brazilian soil.
Authors:	CERDEIRA, A. L. FORSTER, R.
Affiliation:	ANTONIO LUIZ CERDEIRA, CNPMA; REINALDO FORSTER, CNPMA.
Date Issued:	1992
Citation:	In: INTERNATIONAL WEED CONTROL CONGRESS, 1., 1992, Melbourne. Proceedings. Melbourne: Monash University, 1992.
Pages:	p.117
Description:	The persistence of the herbicide picloran (4-amino - 3,5,6 - trichloropicolinic acid) was studied in "Latossolo vermelho" soil (36% clay, 2% organic matter) in Jaguariuna county, Sao Paulo, Brazil. The herbicide was sprayed on plowed soil in March, 1989, at rates of 0.0; 0.56 and 1.12 g/ha. Picloran persistence was evaluated using bioassay with bean (Phaseolus vulagris L.). The data showed that the herbicide was very persistent up to 180 days, just at the raining season, October to December. At the same interval, from 180 to 240 days, typical visual symptoms disappeared, although there were still effects on height of plants, length of leaves and dry weight. No effect of the herbicide was detected after 300 days.
NAL Thesaurus:	chemical control beans picloram weeds soil
Keywords:	Herbicide Persistence
Type of Material:	Resumo em anais e proceedings
Access:	openAccess
Appears in Collections:	Resumo em anais de congresso (CNPMA)