scholarly journals Effect of weed control with fibre mulches and herbicides on the initial development of spruce, birch and aspen seedlings on abandoned farmland

Silva Fennica ◽  
2001 ◽  
Vol 35 (4) ◽  
Author(s):  
Jouni Siipilehto
Keyword(s):  
Weed Control ◽  
Initial Development ◽  
Abandoned Farmland

Rotation and Continuous use of Dietholate, Fonofos, and SC-0058 on EPTC Persistence in Soil

Weed Science ◽  
1990 ◽  
Vol 38 (2) ◽  
pp. 179-185
Author(s):  
Brent W. Bean ◽  
Fred W. Roeth ◽  
Alex R. Martin ◽  
Robert G. Wilson
Keyword(s):  
Weed Control ◽  
Inhibitory Influence ◽  
Laboratory Studies ◽  
Initial Development ◽  
Enhanced Biodegradation ◽  
Previously Treated ◽  
Repeated Use ◽  
Continuous Use ◽  
Biodegradation In Soil

Field and laboratory studies were conducted to examine the influence of continuous use and rotation of extenders on EPTC persistence in soils from Clay Center and Scottsbluff, NE. Rotation of EPTC + dietholate and EPTC + fonofos in soils with three prior annual treatments of each combination did not improve weed control compared to continuous use. SC-0058 was generally effective in slowing EPTC biodegradation in soils previously treated with EPTC, EPTC + dietholate, EPTC + fonofos, or EPTC + SC-0058. Dietholate was effective in slowing EPTC biodegradation in soil previously treated with EPTC or EPTC + SC-0058. SC-0058 appeared to have an inhibitory influence on the initial development of soil-enhanced EPTC biodegradation. Any enhanced biodegradation of dietholate or SC-0058 that may occur after repeated use was not a factor in enhanced EPTC degradation in EPTC + extender history soils.

scholarly journals Simulated rainfall following the preplant application of 2,4-D and dicamba in soybean

2020 ◽  
Vol 50 ◽  
Author(s):  
Diecson Ruy Orsolin da Silva ◽  
Marina Luiza Cuchi ◽  
Álvaro André Alba da Silva ◽  
Bruna Dal'Pizol Novello ◽  
Claudir José Basso
Keyword(s):  
Weed Control ◽  
Simulated Rainfall ◽  
Initial Development ◽  
Rainfall Volume

ABSTRACT Soil residues following the application of 2,4-D and dicamba for weed control may delay the establishment and initial development of soybean, but rainfall can reduce the interval required between application and sowing. Rainfall volumes (0; 10; 30; 60; and 90 mm) were simulated following the application of 2,4-D (300 and 600 g a.e. ha-1) and dicamba (120 and 240 g a.e. ha-1), and the effects on soybean were evaluated. The application of 2,4-D did not affect the soybean establishment or initial development, regardless of the simulated rainfall volume. However, the dicamba residual reduced the soybean establishment for the lower rainfall volumes. Phytotoxicity was more severe for the highest dicamba rate (75-100 %), being 50-100 % for the lowest rate. The higher volumes of simulated rainfall reduced the phytotoxicity of dicamba in soybean, but were not sufficient to reduce the deleterious effects on the initial development of the crop.

scholarly journals Weed Control and Selectivity to Post-Applied Herbicides in Eucalyptus

2017 ◽  
Vol 9 (10) ◽  
pp. 67
Author(s):  
Allan Lopes Bacha ◽  
Mariluce Pascoina Nepomuceno ◽  
Willians Cesar Carrega ◽  
Pedro De Figueiredo Rocha Barbosa Martins ◽  
Pedro Luis da Costa Aguiar Alves
Keyword(s):  
Methyl Ester ◽  
Weed Control ◽  
Dry Matter ◽  
Panicum Maximum ◽  
Weed Species ◽  
Visual Effects ◽  
Initial Development ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Urochloa Brizantha

The objective of this study was to evaluate the selectivity of fluazifop-p-butyl and haloxyfop-R methyl ester on Eucalyptus urograndis (clone GG100), as well as the use of fluazifop-p-butyl for control of Panicum maximum and Urochloa brizantha. Two experiments were conducted in 15-liter capacity pots, in a completely randomized design with four replications. The first experiment consisted of seven treatments, in which fluazifop-p-butyl and haloxyfop-R methyl ester were sprayed at 15, 30 and 37 days after planting (DAP) and a control plot without application. In the second experiment, the treatments consisted of a factorial 4 × 2 (four application periods and two weed species), in which three seedlings of P. maximum or U. brizantha were transplanted per pot. In both experiments, at 90 DAP, plant height, stem diameter, leaf area and total dry matter of eucalyptus were evaluated. In the second experiment, besides the morphological parameters, the percentage of weed control was evaluated. The data was submitted to analysis of variance by F test, and the means compared by Tukey test at the level of 5% of probability. Both herbicides did not cause visual effects of phytointoxication in eucalyptus, but haloxyfop-R methyl ester was not selective to clone GG100 (E. urograndis). Fluazifop-p-butyl was selective to clone GG100, providing better control in the first application period (15 DAP) but only for P. maximum, which negatively affected the initial development of eucalyptus, while U. brizantha was not efficiently controlled with the usage of fluazifop-p-butyl.

scholarly journals Selectivity of herbicides applied, in pre-emergence, during the establishment phase of sugarcane

2020 ◽  
Vol 13 (6) ◽  
pp. 16
Author(s):  
R. C. A. Araújo ◽  
A. M. C. Marinho ◽  
R. G. S. Sobrinho ◽  
V. H. C. Sousa ◽  
L. C. Souza ◽  
...  
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Management Strategies ◽  
Residual Effect ◽  
Crop Productivity ◽  
Soil Conditions ◽  
Control Methods ◽  
Initial Development ◽  
History Of ◽  
Absolute Control

Sugarcane is a very important crop in the history of Brazil, since the period of colonization. Among the factors that affect its yield in commercial areas, weeds could be highlighted. Appropriate management strategies are essential to mitigate this interference and increase crop productivity. In this sense, the aim was to evaluate the effect of different control methods on weed management, in the pre-emergence of two varieties, of cane-plant. The experiment was conducted at  Primavera Farm, Itambé (PE), in randomized blocks, in a 2x5 factorial scheme, with 4 replications. The first factor represented two varieties of sugarcane (RB867515 and RB92579) and the second five weed control methods (weed control, absolute control, s-metalochlor + tebuthiuron, sulfentrazone and oxyfluorfen). The number of tillers per linear meter, degree of phytotoxicity and weed control were evaluated. At the end of the research, the RB92579 variety can be used as an alternative for the weed control because it presents rapid sprouting and initial development and more aggressive tillering than RB867515, under Itambé (PE) soil conditions. It is recommended the use of sulfentrazone at the dose of 1.8 L.ha-1.p.c, for better residual effect and "sufficient" control of weeds in the stage of establishment of the culture.

scholarly journals Effects of clomazone formulations at the initial development of Jatropha curcas

2015 ◽  
Vol 45 (4) ◽  
pp. 364-369 ◽  
Author(s):  
Luiz Neri Berté ◽  
Neumárcio Vilanova da Costa ◽  
João Ricardo Pompermaier Ramella
Keyword(s):  
Weed Control ◽  
Dry Matter ◽  
Chemical Method ◽  
High Efficiency ◽  
Net Photosynthesis ◽  
Initial Development ◽  
Emulsifiable Concentrate ◽  
Suspension Formulation ◽  
Alternative Weed Control ◽  
High Yields

ABSTRACT Competition with weeds is one of the obstacles to achieve high yields in jatropha harvest. The chemical method is an alternative weed control due to its high efficiency, readiness and economy, when compared to other methods. However, products recommended for this crop are scarce. This study aimed at evaluating the effects of pre and post-emergence clomazone formulations at the initial development of jatropha. Two experiments were conducted under a randomized blocks design, in a 2 x 5 factorial arrangement, with four replications, consisting of the combination of two clomazone formulations (encapsulated suspension and emulsifiable concentrate) and five doses (0 g ha-1, 250 g ha-1, 500 g ha-1, 1,000 g ha-1 and 2,000 g ha-1). The dry matter of the plants was reduced both in the pre-emergence and post-emergence applications. Net photosynthesis was not affected by the application of clomazone in both formulations. The encapsulated suspension formulation is less phytotoxic than the emulsifiable concentrate formulation for pre and post-emergence applications. However, both formulations negatively affect the early development of jatropha plants.

scholarly journals Soil cover management: initial development of pear trees hosui cultivar and its effects on soil and weeds

2019 ◽  
Vol 41 (2) ◽  
Author(s):  
Edina Costa Delonzek ◽  
Renato Vasconcelos Botelho ◽  
Marcelo Marques Lopes Muller ◽  
Cleber Daniel de Goes Maciel ◽  
Aline José Maia
Keyword(s):  
Weed Control ◽  
Rice Husk ◽  
Soil Cover ◽  
Tree Planting ◽  
Soil Macrofauna ◽  
Initial Development ◽  
Pine Sawdust ◽  
Pear Tree ◽  
Pear Trees ◽  
Curauá Fiber

Abstract Soil management is a practice that influences the development of fruit trees. In this sense, the objective of this study was to evaluate the effect of different soil cover/mulching types on weed control and on the early development of pear trees Hosui cultvar. The experiment was conducted in two consecutive cycles: 2015/2016 and 2016/2017. Treatments consisted of the following soil covers in pear tree planting rows: natural cover, ryegrass straw intercropped with millet, pine sawdust, shading cover (70%), rice husk, Curauá fiber and weeding. Soil infestation by weeds was evaluated in the spring-summer period for two years, as well as the vegetative pear tree development (plant height and diameter and SPAD chlorophyll index). Managements using Curauá fiber and ryegrass straw + millet had the greatest suppression effects on weeds. The height and diameter of pear trees were smaller with natural cover and pine sawdust, while higher plant growth was observed with Curauá fiber and with weeding. Higher SPAD indexes was observed with Curauá fiber, weeding and ryegrass + millet. Curauá fiber also stood out for Fe and Mn leaf contents, while Zn contents were higher with ryegrass + millet and rice husk. Ryegrass straw + millet and rice husk can be highlighted for the chemical attributes of soil fertility and soil macrofauna indexes. It could be concluded that Curauá fiber and azevem + millet weed control weeds in the orchard, thus promoting better initial development of pear trees Hosui cultivar.

Questionable Research Practices: The Initial Development of a Measure

2006 ◽  
Author(s):  
Kelly L. Wester ◽  
Mark Davis ◽  
John Willse
Keyword(s):  
Research Practices ◽  
Initial Development ◽  
Questionable Research Practices

Initial Development of a Measure of Adolescents' Future Expectations

2007 ◽  
Author(s):  
Ellen H. McWhirter ◽  
Benedict T. McWhirter ◽  
Christina L. Aranda ◽  
Cristina E. Bustos
Keyword(s):  
Future Expectations ◽  
Initial Development
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