Programa de Pós-graduação em Agronomia Tropical, Universidade Federal do Amazonas, Manaus 69067-005, AM, Brazil.
Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Manaus 69067-005, AM, Brazil.
Molecules. 2023 Jul 4;28(13):5193. 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.
瓜拉那（H.B.K. var. sorbilis）的种子产量受到杂草的影响。由于该地区炎热潮湿的气候，亚马逊地区的农民和牧场主很难进行管理，这使得机械控制效率低下，并导致农民决定使用除草剂。目前尚不清楚除草剂对该物种的危害。本研究的目的是评估草甘膦对瓜拉那幼苗发育和质量的损害。处理包括浓度为 0、126、252、540、1080、2160 和 3240 g a.e. ha 的草甘膦剂量，在两次施药后 60 天进行评估。进行了生物计量学、幼苗发育、炭疽病和损伤特征分析。所有施用量的草甘膦均导致了损伤症状，但较低的剂量不会干扰幼苗的生长和发育。炭疽病严重程度与草甘膦剂量增加之间存在相关性。正确使用时，草甘膦可以成为瓜拉那作物中杂草综合管理的工具。
