-The presence of weeds in commercial fields of cabbage may interfere directly and indirectly on yield and on the quality of the commercial product. Therefore, the satisfactory production depends on a successful control of weeds. Because of the limited availability of herbicides registered in Brazil for cabbage crop in addition to the lack of information in the literature, the objective of this work was to evaluate the selectivity of herbicides to cabbage. The herbicides S-metolachlor (1,740 and 768 g ha ) mixture applied after transplant. The experiment was developed in the field, in a randomized block design with four replications. Weed control and cabbage crop injury were evaluated as well as the number of productive and suppressed cabbage plants, the average fresh mass of heads and yield. All herbicide treatments controlled weeds in the area satisfactorily; however, most of them caused high toxicity in plants with the exception of oxyfluorfen, applied before transplant, and flumioxazin and S-metolachlor, applied after transplant, which caused little leaf injury in plants. Oxyfluorfen applied before and after transplant and S-metolachlor, applied after transplant did not affect the number of productive and suppressed plants nor yield, being selective in cabbage.Keywords: herbicides tolerance, weed management, yield. RESUMO -A presença de plantas daninhas em áreas comerciais de repolho pode interferir direta e indiretamente na produtividade e na
Growth measurements such as leaf area (LA) and dry matter (DM) are important in experiments about plants population, fertilization, irrigation and others parameters of cultivation, in garlic crop. The LA and DM are commonly defined as destructive, lengthy and cause loss of plants in the experimental units. The objective of this study was to fit mathematical models using linear models that estimate the leaf area and dry matter of garlic plants - variety Ito. For that, garlic plants were collected at 30, 45, 60, 75, 90, 115 and 120 days after planting. The measurements of width (W), length (L) of leaves, LA, DM, pseudostem diameter (PD), number of leaves per plant (NL) and height (H) were determined in each time. The models were fitted to estimate the LA or DM as function of the variables W, L, L*W, PD and LA. The statistical analysis of the linear regression, coefficient of determination of the linear regression (R2), root mean square error (RMSE), modified concordance index (d1) and the BIAS index were verified to determine the most representative models. It`s possible to estimate the LA and the leaf DM of garlic plants using the variables: length, width, pseudostem diameter and height of plants.
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