Brazilian sedge grass has developed resistance to glyphosate, clethodim and haloxyfop-butyl, posing a serious threat to soybean production

A study by the Biological Research Center reveals the significant impact of goosegrass on soybean production, with one weed per square meter leading to 518 kg of oilseed loss and 12 weeds resulting in 3024 kg of loss. The rapid spread of goosegrass, especially in warm climates and under heavy herbicide use, is attributed to its high seed yield and adaptability. The situation is particularly critical in Brazil, where goosegrass has developed resistance to common herbicides used in cotton-growing areas, posing a threat to various crops. To address this issue, Sumitomo Chemical's agronomist suggests an integrated management strategy that includes early management, diverse herbicide use, and the adoption of other technologies to prevent resistance and ensure crop sustainability. Techniques such as drying treatment before planting and pre-sowing herbicide application can effectively control weed pressure.

The Biological Research Center analyzed the competitive losses caused by goosegrass to soybean planting and found that one goosegrass per square meter may cause 518 kg of oilseed loss; if there are 12 weeds per square meter, the loss will soar to 3024 kg. Sumitomo Chemical's agronomist pointed out that as the resistant population deteriorates, producers face the dilemma of reduced effective herbicide options and need to use other technologies such as machinery, but soil disturbance will stimulate the germination of other weeds. Goosegrass grows rapidly and can form dense populations in harsh environments. Its germination is closely related to soil moisture and has a high probability of germination after rain. Although its The ability to spread is low, but high seed yield and the ability to adapt to warm climates promote its spread. In cotton-growing areas, due to intensive herbicide use, the resistance of goosegrass to glyphosate and haloxyfop is particularly obvious, and the ...