Planejamento fatorial no estudo da fitotoxicidade de extratos de plantas em sementes de alface

• Main Author: Silva, Erika Matias
• Publication Date: 2021
• Other Authors: Silva, Érik José Ferreira da, Pires, Edjane Vieira, Carvalho, Cenira Monteiro de, Pimentel, Wagner Roberto de Oliveira, Nascimento Júnior, Pedro Almeida do
• Format: Article
• Language: por
• Source: Diversitas Journal
• Download full: https://diversitasjournal.com.br/diversitas_journal/article/view/1788

ABSTRACT: Weeds are one of the main problems in the cultivation of agricultural products and the main method of control is still the use of chemical herbicides, which are efficient, have direct and indirect consequences that outweigh the benefits in many cases, thus opening the way for research and development of bioherbicides. Therefore, the objective of this study was to evaluate, through a factorial design 23, which is the best experimental pathway to inhibit the germination of Lactuca sativa seeds, studying the variables concentration, part of the plant and extraction solvent in addition to your interactions. Thus, ethanol extracts were chosen, as well as aqueous extracts from the stem bark and leaves of three species occurring in the state of Alagoas. Following the germination bioassays and initial growth of L. sativa seeds compared to extracts in the 50% and 100% operations in the laboratory. It was evidenced that the ethanolic extract of Delonix regia in a more diluted concentration is more efficient in inhibiting germination. In relation to the species Amburana cearensis and Tabebuia avellanedae, better inhibition effects were required when the extracts were from the stem and leaf respectively. KEYWORDS: Allelochemicals, Pest Control, Statistical Analysis.