Using Glyphosate on Guarana Seedlings in the Amazon

• Published in: Molecules (Basel, Switzerland) Vol. 28; no. 13; p. 5193
• Main Authors: Konrad, Bruna Nogueira Leite, Pinheiro, Sara Cruz, Ferreira, Carla Coelho, Hoffmann, Evandro Konrad, Albertino, Sônia Maria Figueiredo
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 04-07-2023; MDPI
• Subjects: Amino acids; Analysis; Anthracnose; Beverage industry; Biometrics; Caffeine; Crop diseases; Crop yield; Damage assessment; Farmers; Glyphosate; herbicide; Herbicides; Humid climates; Injuries; Injury; Injury analysis; Leaves; Mechanical control; Microorganisms; Paullinia; Paullinia cupana; Plant growth; Regression analysis; Seedlings; Seeds; Variance analysis; Weed control; Weeds; Brazil; anthracnose; herbicide; Injury; Paullinia cupana
• ISSN: 1420-3049; 1420-3049
• DOI: 10.3390/molecules28135193

The seed yield of guarana (
H.B.K. var. sorbilis) is affected by weeds. Management is difficult for Amazon farmers and ranchers, owing to the hot and humid climate prevailing in the region, which makes mechanical control inefficient and leads farmers to the decision to use herbicides. Herbicide damage to this species is unknown. The objective of this study was to evaluate glyphosate damage to the development and quality of guarana seedlings. The treatments consisted of glyphosate doses at concentrations of 0, 126, 252, 540, 1080, 2160 and 3240 g a.e. ha
and were evaluated for 60 days, in two applications. Analyses were performed for biometrics, seedling development, anthracnose and Injury characteristics. Glyphosate caused symptoms of Injury in all doses applied, but lower doses did not interfere with seedling growth and development. There was a correlation between anthracnose severity and increased glyphosate dose. When applied correctly, glyphosate can be an integrated weed management tool for use in guarana crops.