Metodologia alternativa para o teste de germinação em sementes de híbridos de milho tratadas quimicamente

Abstract

Corn (Zea mays L.) is the second largest crop of importance in agricultural production in Brazil. It is known that the seed is one of the main inputs of agriculture and its quality is one of the primary factors for the establishment of the species. To maintain physiological quality, seed treatment has been used as a protection tool both in the field and in storage. Thus, this work aimed to identify the most suitable conditions for the evaluation of the germination test in corn seeds through the use of different substrates. Two tests were carried out for the development of the work. In test 1, the hybrid Morgan 30A37 PWV was used in a factorial scheme of five substrates with eight chemical treatments. The seeds were treated industrially with the following insecticides: Inside FS, Inside FS + Maestro FS, Maestro FS, Poncho, Inside FS + BioCoat Corn, Inside FS + Maestro FS + BioCoat Corn and Maestro FS + BioCoat Corn. For test 2, the hybrid used was the FS533 PWV in a factorial scheme of five substrates and five treatments, in which the seeds received the industrial treatment with the insecticides: Inside FS, Inside FS + Maestro FS, Maestro FS and Poncho. Both tests were submitted to two temperatures (20 °C and 25 °C) and five substrates (germitest® paper; germitest® paper + sand; germitest® paper + soil; germitest® paper + coal and brown paper). The most suitable substrates for installing the germination test in chemically treated corn seeds were brown pepper and germitest® + charcoal. And the temperature of 20 °C allows the more uniform and faster development of normal seedlings in the germination test in treated hybrid corn seeds.