The P 2 O 5 and K 2 O and up to half of the recommended N could be applied in a band alongside the row at planting if desired. Mechanical harvesting is more successful with varieties that have minimal branching and a height from the soil surface to the first capsule of about 12 in. Because of their slow early growth, sesame plants are poor competitors against weeds. Select fields with low weed densities. Shallow cultivation is recommended, because the fine, fibrous sesame roots grow close to the surface and are easily damaged.
Early cultivation causes seedlings to grow faster, possibly as a result of improved soil aeration.
After the plants reach a height of 3 or 4 in., they grow rapidly. Cultivate only as necessary to control weeds. No herbicides are currently registered in Wisconsin or Minnesota for use on sesame. Growers should check current labels for use of these or other products in their growing area. Some of the disease organisms are carried on the seed.