Resumo -A emergência da soja durante o cultivo do feijão pode interferir negativamente na produtividade do feijoeiro. Este problema pode ser minimizado com o uso de herbicida que seja seletivo ao feijoeiro e não seletivo a soja. Neste contexto, avaliou-se a seletividade do herbicida ethoxysulfuron às culturas da soja e do feijão. Dois experimentos foram realizados em casa de vegetação no delineamento de blocos casualizados, com quatro repetições. Cada experimento correspondeu a uma cultura avaliada: feijão ou soja. Os tratamentos foram arranjados em esquema fatorial 2x9, com o primeiro fator correspondente a aplicação do herbicida isolado ou em mistura com óleo mineral Nimbus ® na concentração de 0,5% v/v e o segundo fator das doses do ethoxysulfuron (0; 1,8; 3,6; 5,4; 7,2; 9,0; 13,5; 18,0 e 36,0 g i.a ha -1 ). Avaliou-se aos 7, 14, 21 e 28 dias após a aplicação do herbicida (DAA) a fitointoxicação visual e aos 35 DAA a área foliar e massa da matéria seca total das plantas. O ethoxysulfuron causou baixa intoxicação às plantas de feijão, sem interferir na área foliar e na massa da matéria seca total das plantas. A soja foi sensível ao herbicida, sobretudo nas maiores doses e na presença do óleo mineral. A dose de 36 g i.a. ha -1 de ethoxysulfuron com o óleo mineral causou a morte das plantas de soja, sem alterar o crescimento do feijoeiro. Palavras-chaves: Phaseolus vulgaris, Glycine max, planta voluntária, tigueraAbstract -The emergence of soybean seeds in fields during the common bean cultivation can negatively affect the growth and yield of this crop. This problem can be minimized with the use of selective herbicides to common bean but non-selective to soybean. Aiming to define management strategies to voluntary soybean plants in the common beans crop, this research was carried out to evaluate the selectivity of ethoxysulfuron to soybean and common beans crops. Two experiments were conducted in a greenhouse, in randomized block design with four replications. Each experiment corresponded to a crop: soybean or common bean. Treatments were arranged in factorial arrangement 2x9, where the first factor corresponds to herbicide application single or in tank mixture with mineral oil Nimbus ® at 0.5% v/v and the second was related to ethoxysulfuron doses (0, 1.8, 3.6, 5.4, 7.2, 9.0, 13.5, 18 and 36 g a.i. ha -1 ). At 7, 14, 21, and 28 days after application (DAA) was evaluated the visual intoxication, and at 35 DAA the leaf area and total plant dry matter. The ethoxysulfuron caused low intoxication to common bean plants, without interfering in leaf 1 Recebido para publicação em

Carrot (Daucus carota L.) is a vegetable crop that is grown throughout the year across various regions of Brazil in rotation or in succession to other cultures. Herbicide residual effect has emerged as a concern, because of the possibility of carryover. Thus, the objective of this study was to evaluate the effect of tembotrione and atrazine residues - in mixture and isolated - on carrot planted in succession to corn. The experiment was designed in randomized blocks with five replications. Treatments consisted of tembotrione (50.4 g ha(-1)), tembotrione (100.8 g ha(-1)), tembotrione + atrazine (50.4 g ha(-1)+ 2 L ha(-1)), tembotrione + atrazine (100.8 g ha(-1)+ 2 L ha(-1)), and atrazine (2.00 L ha(-1)) applied eight months before carrot seeding, plus a control treatment with no herbicide application. Investigated variables were shoot dry mass, productivity, and classification of carrot roots. The presence of atrazine and tembotrione decreased dry mass in the area, and only tembotrione reduced total root productivity. Thus, there is a carryover effect to tembotrione application that reduces the dry matter accumulation of shoot and total productivity, and an atrazine + tembotrione (100.8 g ha(-1)) mixture reduces the total productivity after application of these herbicides to soil.

Metribuzin is an herbicide widely used in the control of weeds in crops such as soybean, potato and tomato. However, there is suspicion of intoxication in crops cultivated in succession due to the residual effect of the product in the soil. As such, our goal was to evaluate the residual effect of metribuzin in the soil on the growth of garlic, onion and beans plants. Three experiments were conducted in a greenhouse, in a randomized block design, with four replications. Each experiment corresponded to the evaluated crop: garlic, onion or beans. The treatments consisted of different metribuzin concentrations in the soil (0; 6; 12; 24; 48; 96; 144; 192; 240 and 480 ppb). Visual intoxication was evaluated at 7, 14, 21 and 28 days after emergence (DAE) of the crops and dry matter at 28 DAE. Intoxication was identified in the garlic and bean plants at metribuzin concentration of 96 ppb, with maximum impact of 55 and 63%, respectively, at 28 DAE. In the onion crop, symptoms of intoxication arose at 40 ppb, and from 14 DAE onwards, plant death was noted at herbicide concentrations from 240 to 480 ppb. The dry matter of the bean and onion plants was reduced by the presence of herbicide in the soil, while garlic plant growth was not affected. Residues of metribuzin in the soil can hinder successive planting of garlic, onion or bean crops. It was concluded that garlic, onion and bean plants are sensitive to the residual effect of metribuzin in the soil.Resumo -O metribuzin é um herbicida amplamente utilizado para o controle de plantas daninhas em culturas como a soja, a batata e o tomate. No entanto, há suspeitas de intoxicações de culturas cultivadas em sucessão devido a resíduos desse produto no solo. Assim, objetivou-se avaliar o efeito de resíduos de metribuzin no solo sobre o crescimento de plantas de alho, cebola e feijão. Foram realizados três experimentos em casa de vegetação, no delineamento de blocos casualizados, 1

The Cerrado is an important agricultural region for the production of food, feed and (bio)fuel, with great potential for the cultivation of tropical wheat (Triticum aestivum L.). However, it is necessary to understand how some genotypes of that crop would fit into this biome, as well as to identify possible physiological and chemical markers that may contribute to the selection of the best plant materials. The objective of this research was to evaluate the metabolic, physiological, biometric and productive characteristics of six wheat cultivars, commonly cultivated in the Cerrado of Minas Gerais, through multivariate analysis (Principal Components Analysis: PCA), in order to characterize the performance of these cultivars in the Cerrado conditions, in two years (2016 and 2017). The PCA showed that monosaccharides content (glucose and fructose) and net CO 2 assimilation rate were highly correlated in both years. Significant differences in rainfall between the two years resulted in different responses of the cultivars and their respective metabolic, physiological, biometric and productive behaviour. Furthermore, it was demonstrated that the CD 151 and Bio Sintonia cultivars grew better when exposed to favourable rainfall conditions, whereas BRS 264 and BRS 394 were the cultivars most suited to lower rainfall.

MAGALHÃES, G. A. Nível de aptidão física relacionada à saúde de policiais militares da 17ª companhia do 34º batalhão de polícia militar do estado de minas gerais, 2009.