Prediction of Black and Eastern Black Nightshade (Solanum nigrum and S. ptycanthum) Growth Using Degree-Days

• Published in: Weed science 1992-01, Vol.40 (1), p.86-89
• Main Authors: McGiffen, Milton E., Masiunas, John B.
• Format: Article
• Language: English
• Subjects: Agronomy. Soil science and plant productions; biologia; Biological and medical sciences; biological competition; biologie; biology; biomasa; Biomass; biomasse; calor; chaleur; Coefficients; competencia biologica; competition biologique; crecimiento; croissance; Crop harvesting; Energy crops; fenologia; forecasting; Fundamental and applied biological sciences. Psychology; Generalities, botany, ecology, damages, economic importance; growth; growth rate; heat; Heat sums; indice de crecimiento; Leaf area; malezas; mauvaise herbe; modele; modelos; Night tables; Parasitic plants. Weeds; phenologie; phenology; Phytopathology. Animal pests. Plant and forest protection; Planting; Plants; produccion; production; reproduccion sexual; reproduction sexuee; sexual reproduction; solanum; Solanum nigrum; Solanum ptycanthum; superficie foliar; surface foliaire; taux de croissance; technique de prevision; tecnicas de prediccion; Vegetation canopies; Weed Biology and Ecology; Weeds
• ISSN: 0043-1745; 1550-2759
• DOI: 10.1017/S0043174500057003

The objectives were to compare the growth of black and eastern black nightshade and develop predictive models for their growth. Black and eastern black nightshade were planted on June 3 and 23, and July 12 in 1988 and May 28, June 17, and July 10 in 1989. Exponential models were strongly correlated with the growth of both species across all planting dates. Eastern black nightshade produced more biomass than black nightshade, although weight of berries was equivalent. Leaf area per plant 60 d after planting was five times greater for eastern black nightshade than black nightshade. Eastern black nightshade responded to self-shading by increasing specific leaf area.