Abstract
Pathogens in the soil or transmitted by seeds can reduce the stand of plants, affecting the yield of the crop. Furthermore, in the case of rice, the low temperature is a limiting factor in culture. The treatment of seeds with insecticides is an alternative to reduce the damage caused by pests incidents during the early stages of plant development and in some cases, may assist in the germination of seeds exposed to low temperatures. In this sense, the objective of this study was to evaluate the influence of seed treatment with insecticides in the physiological quality and yield of hybrid rice seeds, cv. Inov CL. For this, three experiments were conducted with treated seeds in different doses of thiamethoxam + lambda-cyhalothrin and fipronil totaling seven treatments, including the control (no product). In the first experiment, it was determined seed germination to 10°C, 13°C, 16°C, 20°C and 25°C. In the second experiment, it was assessed seed vigor through accelerated aging, cold test and emergency field. The third experiment was carried out into the field to observe the number of panicles m-2 and crop yield. It is concluded that treatment of hybrid rice seeds, cv. Inov CL with thiamethoxam + lambda-cyhalothrin and fipronil increases the germination percentage of seed and early seedling performance. Treatment of hybrid rice seeds, cv. Inov CL with thiamethoxam + lambda-cyhalothrin provides greater germination and early seedling performance compared to treatment with fipronil. Treatment of hybrid rice seeds, cv. Inov CL with thiamethoxam + lambda-cyhalothrin in dosages of 500 mL 100 kg-11 of seeds or 500 mL 45 kg-1 of seeds increases grain yield.
Highlights
Rice (Oryza sativa L.) is a staple food of the population [1], and the state of Rio Grande do Sul is the main producer of cereal in Brazil
It can be seen that the seeds treated with thiamethoxam + lambda-cyhalothrin, regardless of the dosage used, showed statistically higher percentage of germination than seeds of other treatments in the five temperatures studied (Table 2)
In a study with bean seeds treated with thiamethoxam, it was found that the product provided increases in germination [21]
Summary
Rice (Oryza sativa L.) is a staple food of the population [1], and the state of Rio Grande do Sul is the main producer of cereal in Brazil (approximately 69%). The treatment of seeds with insecticides is considered a cheap and viable alternative to reducing the damage caused by soil and shoot pests incidents during the early stages of plant development [5]. Within this context, it is becoming common to use insecticides that have physiological activities in plants, with fito-tonic effect, favoring vigorous growth and better use of their productive potential [6]. According Menten [7], treatment of seeds with insecticides is a practice that is possible to reduce the number of applications of insecticide after emergence of the crop in most cases
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
