Germination and Seedling Growth of Sorghum (Sorghum bicolor) Hybrids After Seed Storage with Safeners at Varying Humidities

Abstract

Laboratory and growth room experiments were conducted to determine effects of CGA-133205, oxabetrinil, and flurazole on grain sorghum hybrids ‘DeKalb 46’ and ‘DeKalb 48’ after the seed were treated with the herbicide safeners and stored for up to 24 wk at various relative humidity levels. Each safener treatment had an adverse effect on grain sorghum seed as reflected by fewer normal seedlings at 4 d when averaged over storage time and relative humidity levels. Flurazole and oxabetrinil increased the number of ungerminated seed of both hybrids, and 0.4 and 0.8 g ai kg–1CGA-133205 increased ungerminated seed of DeKalb 46. At ≥ 8 wk after storage, a reduction in germination was observed for seed treated with flurazole or oxabetrinil compared to seed stored without safener. This reduction also occurred with 0.4 and 0.8 g kg–1CGA-133205, but only at 24 wk after storage. Each safener treatment minimized reduction in seedling shoot fresh weight by herbicides compared to the no-safener check through 24 wk after storage.

Achievements and problems in the weed control in grain sorghum (Sorghum Bicolor Moench.)

“…There is a decrease of seed germination during longer storage of seeds treated with herbicide antidotes flurazole and oxibetrinil. For this reason, the seeds should be stored without an antidote and must be treated immediately before sowing (Zhang et al, 1994).…”

Research Progress in the Design and Synthesis of Herbicide Safeners: A Review

“…After the emergence of NA herbicides and dichloroacetamide herbicides, oxime ether herbicide safeners were developed. Oxime ether herbicide safeners have extremely high biological activity, high efficiency, low toxicity, and low residue, are relatively friendly to the environment, and protect sorghum and other crops from amide herbicides, sulfonylurea herbicides, and imidazolinone herbicides. − A variety of oxime ether compounds have been studied, and many compound structures, such as cyometrinil, fluxofenim, and oxabetrinil, have been commercialized. Maize, sorghum, etc.…”