Treatment with insecticide and fungicide on the physiological quality of lentil seeds.

J Rubert,S H B Dornelles,N T Pedrollo,U R Nunes,J C Cassol,M Peripolli

doi:10.1590/1519-6984.246670

Abstract

The low Brazilian productive index and the high demand have aroused interest in the cultivation of lentils, however the legume is little known and needs further studies. The objective of this study was to analyze and identify the effects of treatments with insecticides and fungicides on the physiological quality of lentil seeds, CA-1512 strain. The experiments were conducted in the seed laboratory in a completely randomized design with seven treatments and four replicates. Seed treatment with Thiophanate-methyl; Fluazinam® (180 ml) + Pyraclostrobin; Thiophanate-methyl; Fipronil® (150 ml) promoted higher levels of germination under accelerated aging, lower number of abnormal seedlings and longer lengths of shoot and radicle for the emergence in paper. Treatment with Carboxin; Thiram® (250 ml) + Imidacloprid® (150 ml) allowed a higher value in the first count of germination in sand, lower number of dead seeds under accelerated aging and longer root length, in the emergence in sand. Shoot length in the emergence in sand increased after seed treatment with Metalaxyl-M; Fludioxonil® (75 ml) + Pyraclostrobin; Thiophanate-methyl; Fipronil® (150 ml). Treatments with fungicides and insecticides considerably improved the physiological properties of the seeds, thus being able to guarantee greater phytosanitary qualities in the field, generating healthier seedlings and with protection against possible pests and diseases, and consequently guaranteeing greater productivity.

Highlights

Lentil (Lens culinaris Medick) is an annual cycle legume, belonging to the Fabaceae family and is among the five most important legumes in the world, due to its high nutritional value (Nascimento et al, 2016)
Production levels are low due to the scarcity of technical knowledge on the crop and research with cultivars adapted to the conditions of climate and soil (EMBRAPA, 2018)
The experimental design was completely randomized with seven treatments, namely: (C): T1control; T2- Carboxin; Thiram® (250 ml) + Imidacloprid® (150 ml); T3- Carboxin; Thiram® (300 ml) + Imidacloprid® (150 ml); T4- Metalaxyl-M; Fludioxonil® (75 ml) + Pyraclostrobin; Thiophanate-methyl; Fipronil® (150 ml); T5- Metalaxyl-M; Fludioxonil® (100 ml) + Pyraclostrobin; Thiophanate-methyl; Fipronil® (150 ml); T6- Thiophanatemethyl; Fluazinam® (145 ml) + Pyraclostrobin; Thiophanatemethyl; Fipronil® (150 ml) and T7- Thiophanate-methyl; Fluazinam® (180 ml) + Pyraclostrobin; Thiophanate-methyl; Fipronil® (150 ml), with four replicates

Summary

Introduction

Lentil (Lens culinaris Medick) is an annual cycle legume, belonging to the Fabaceae family and is among the five most important legumes in the world, due to its high nutritional value (Nascimento et al, 2016). In 2018, the world production of lentil was 6,375,732 tons (FAOSTAT, 2020). In Brazil, its production is virtually zero; in 2017, it was only 8 tons (IBGE, 2019), having high. Production levels are low due to the scarcity of technical knowledge on the crop and research with cultivars adapted to the conditions of climate and soil (EMBRAPA, 2018)

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Discussion

Conclusion