4 documents found, page 1 of 1
Effect of high temperature and recovery from stress on crop–weed interaction
Ruchel,Queli; Zandoná,Renan Ricardo; Fraga,Diego Severo; Agostinetto,Dirceu; Langaro,Ana ClaudiaABSTRACT Biotic and abiotic stresses, either individually or in combination, may affect soybean growth and development negatively, besides competitiveness with weeds. This study aimed at evaluating the effect of heat stress and plant recovery on crop–weed interaction by analyzing growth variables. Experiments were set up as replacement series of soybean with slender amaranth. Treatments followed a factorial sch...
Germination, viability and longevity of horseweed (Conyza spp.) seeds as a func...
Agostinetto,Dirceu; Vargas,Andrés Antonio Monge; Ruchel,Queli; Silva,Jéssica Dias Gomes da; Vargas,LeandroABSTRACT: In Brazil, horseweed is one of the most important weeds because of the resistance to herbicides and high competitive for the crops. A large of losses were reported in major crops such as soybeans, wheat and corn, where the use a no-tillage system and the herbicide resistance promote better establishment. A correct understanding of the way temperature influences germination enables the prediction of th...
Oxidative stress caused by the use of preemergent herbicides in rice crops
Langaro,Ana Claudia; Agostinetto,Dirceu; Ruchel,Queli; Garcia,Jessica Rodrigues; Perboni,Lais TessariABSTRACT Among the methods of weed control, stands out chemical control. However, even selective, herbicides can trigger the production of reactive species of oxygen and cause oxidative stress. The aim of the study was to evaluate changes in photosynthetic parameters, oxidative damage, antioxidant enzyme activity and altered metabolism of rice plants after applying pre-emergent herbicides. The experiment was co...
Antioxidant activity of rice plants sprayed with herbicides
Nohatto,Marcos André; Agostinetto,Dirceu; Langaro,Ana Claudia; Oliveira,Claudia de; Ruchel,QueliABSTRACT Understanding the physiological defense behavior of plants subjected to herbicide application may help to identify products with higher or lower capacity to cause oxidative stress in crops. This study aimed at evaluating the effect of herbicides in the antioxidant activity of rice plants. The experimental design was completely randomized, with six replications. Treatments consisted of the herbicides be...