Grow rust-resistant cultivars and remove volunteer seedings in and around older plantings. If practical, spray the foliage after harvest has been discontinued with an approved fungicide according to label directions. Fusarium crown and root rot causes yellowing and wilting of foliage. Plant only healthy crowns in areas that have not previously been infected. Also, provide good soil drainage and avoid wounding the plants during cultivation.
Wounds offer an entranceway for pathogens.
Weed Control Weed control can be accomplished by hand-pulling, hoeing, and cultivating during the first planting year. Labeled pre-emergence herbicides may be used during subsequent growing seasons according to label directions. In established plantings after the last harvest when no asparagus foliage is above ground, a home garden formulation of glyphosate non-selective herbicide can be sprayed to kill any existing weeds. Be sure to read and follow all label directions. Do not use salt as a weed killer .