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Abstract
The South Carolina Agriculture Experiment Station and the United States Department of Agriculture announce the joint release of ‘Carolina’ collard Brassica oleracea L. (Acephala group). ‘Carolina’ offers potential because of its resistance to downy mildew incited by Penospora parasitica (Pers.) ex Fr., because of its desirable horticultural characteristics, and because it broadens the genetic base of collard.
Abstract
Populations of cabbage looper, Trichoplusia ni (Hubner), and the imported cabbageworm, Pieris rapae (L), generally were about the same on 4 cabbage cultivars treated weekly with a spray mixture containing Bacillus thuringiensis Berliner (45 g/ha) and chlordimeform (1400 g/ha). However, ‘Stein’s Early Flat Dutch’ and ‘Ferrys Round Dutch’ had more plants with uninjured heads and wrapper leaves than did ‘Copenhagen Market No. 86’ and ‘Resistant Golden Acre’. Data suggest complementary effects of host plant natural resistance and the microbial-chemical spray. ‘Stein’s Early Flat Dutch’ was most resistant and ‘Resistant Golden Acre’ was most susceptible, on the basis of the amount of feeding injury.
Abstract
In field tests, the most effective film mulch in deterring insects and reducing insect damage to fruits was aluminum. The insects affected were aphids, brown stink bugs, aphid parasites, and Diabrotica spp. Mosaic virus diseases were reduced among aluminum-mulched squash (Cucurbita pepo L.) and cucumber (Cucumis sativus L.) plants. Plant growth, flowering, and fruiting were delayed in tomatoes (Lycopersicon esculentum Mill.) and southernpeas (Vigna unguiculata (L.) Walp.).