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Abstract
The ‘Topaz’ (Fig. 1) sweet potato [Ipomoea batatas (L.) Lam.], developed by the Texas Agricultural Experiment Station, combines high yield good sprout production, and excellent baking and canning quality.
Abstract
Out of 38 lines of sweet potato [Ipomoea batatas (L.) Lam.] which had demonstrated some resistance in laboratory tests to the sweetpotato weevil, Cylas formicarius elegantulus (Summers), 13 lines had significant levels of resistance, based on weevil free yield in artificially infested fields in Yoakum, Texas. Two lines, W 125 and W 119, previously released as having weevil resistance, maintained a high level of resistance.
Abstract
Forty-five lines of sweet potato (Ipomoea batatas (L.) Lam) were rated for resistance to the sweet potato weevil in artificially infested fields at Savannah, Georgia and at Yoakum, Texas. Ten lines were resistant in Savannah, 16 lines in Yoakum, and 3 lines were resistant in both locations.
Abstract
‘Prior Lisbon’ lemon trees were treated with increasing rates of N fertilizer up to 6 lb. N per tree per year. Likewise, ‘Monroe Lisbon’ lemon trees were treated with up to 4 lb. N per tree per year. Also, for the Trior Lisbon/one treatment was 6 urea foliage sprays per year which supplied about 2 lb. N per tree per year. For the Trior Lisbon’ there was a tendency for yields to increase with increasing N rates with the high rate yielding significantly more than the low rate. Yield was highly correlated with leaf N with maximum yield occurring at about 2.2% leaf N. Urea foliage sprays maintained leaf N and maximum yield. Fruit quality was not adversely affected by increasing N. As with Prior ‘Lisbon’, ‘Monroe Lisbon’ yields increased with increasing N but the maximum yield occurred at about 2.5% leaf N. Yields from single N applications were not different from split N applications.
Abstract
Six sweet potato (Ipomoea batatas (L.) Lam.) breeding lines, W-71, W-115, W-119, W-125, W-149 and W-154, possessing moderate levels of resistance to the sweet potato weevil, Cylas formicarius elegantulus (Summers), in combination with resistances to other released. They have dark orange flesh, relatively high yields and generally acceptable canning and baking qualities.
Abstract
‘Regal’ sweet potato [Ipomoea batatas (L.) Lam.] was developed jointly by the USDA, the South Carolina Agricultural Experiment Station, and the Texas Agricultural Experiment Station. This cultivar has high yield and excellent baking flavor in combination with high levels of resistance to a wide array of diseases and insects.
Abstract
The ‘Resisto’ sweet potato [Ipomoea batatas (L.)Lam.] developed jointly by the U.S. Department of Agriculture, the South Carolina Agricultural Experiment Station, and the Texas Agricultural Experiment Station, combines high yield and excellent baking and canning quality with resistances to disease and insect pests not available in present cultivars.