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Differential Tolerance of Clones of Eucalyptus grandis Exposed to Drift of the Herbicides Carfentrazone-Ethyl and Glyphosate Planta Daninha
SANTOS,S.A.; TUFFI-SANTOS,L.D.; ALFENAS,A.C.; FARIA,A.T.; SANT’ANNA-SANTOS,B.F..
ABSTRACT: Drift of the herbicides carfentrazone-ethyl and glyphosate may affect the initial growth of eucalyptus. This study aimed to assess the effect of carfentrazone-ethyl and glyphosate drift on photosynthesis, leaf morphoanatomy, and initial growth of two clones of Eucalyptus grandis. Two experiments were carried out in a 2 x 4 factorial scheme, in which factor 1 was represented by two clones of E. grandis and factor 2 by four herbicide underdoses (control, 86.4 g a.e. ha-1 of glyphosate, 3.0 g a.e. ha-1 of carfentrazone-ethyl, and the mixture of 86.4 g a.e. ha-1 of glyphosate + 3.0 g a.e. ha-1 of carfentrazone-ethyl). Herbicide application was carried out by simulating the drift in the lower third of seedling canopy. Assessments were performed 23...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eucalyptus; Photosynthesis; Leaf morphoanatomy; Phytointoxication.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100223
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Economic Injury Level of Canjiqueira in Native Pastures in Pantanal of Nhecolândia Planta Daninha
BERSELI,C.; BONO,J.A.M.; SANTOS,S.A.; PEREIRA,F.A.R.; REIS NETO,J.F..
ABSTRACT: Pantanal plain has large extensions of land formed by many types of landscapes suitable to extensive livestock system. Open grasslands and lowlands are formed by forage such as grasses and forbs widely consumed by cattle. However, climatic and human factors can promote the dissemination of invasive shrub species such as canjiqueira (Byrsonima cydoniifolia A. Juss) making it necessary, in many cases, the human intervention to control the invasion. The present work had as objective to determine the economic threshold level to control canjiqueira through two methods: tractor driven blade and link chains pulled by tractor in different invasion levels plants per hectare. Economic Threshold proved to be a tool for efficient and effective management for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Byrsonim cydoniifolia A. Juss; Cost control; Beef cattle; Economic threshold.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100192
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