Growth analysis of crambe

• Published in: Crop science Vol. 38; no. 1; pp. 108 - 112
• Main Authors: Kmec, P, Weiss, M.J, Milbrath, L.R, Schatz, B.G, Hanzel, J, Hanson, B.K, Eriksmoen, E.D
• Format: Journal Article
• Language: English
• Published: Madison, WI Crop Science Society of America 01.01.1998; American Society of Agronomy
• Subjects: Agricultural production; Agronomy. Soil science and plant productions; Analysis; AVENA SATIVA; Biological and medical sciences; BIOMASA; BIOMASS; BIOMASSE; CALOR; CHALEUR; CONDUITE DE LA CULTURE; CRAMBE; CRECIMIENTO; CROISSANCE; CROP MANAGEMENT; CROP YIELD; Crops; DAKOTA DEL NORTE; DAKOTA DU NORD; DEFOLIACION; DEFOLIATION; DURACION; DURATION; DUREE; Economic plant physiology; FEUILLE; FLORACION; FLORAISON; FLOWERING; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Generalities; Generalities. Agricultural and farming systems. Agricultural development; Generalities. Production, biomass, yield. Quality; GROWTH; Growth and development; GROWTH RATE; HEAT; HEAT SUMS; HELIANTHUS ANNUUS; HOJAS; INDICE DE CRECIMIENTO; INDICE DE SUPERFICIE FOLIAR; INDICE DE SURFACE FOLIAIRE; LEAF AREA INDEX; LEAVES; MANEJO DEL CULTIVO; NORTH DAKOTA; Oilseed plants; Pest control; Phytopathology. Animal pests. Plant and forest protection; Plant growth; PLUTELLA XYLOSTELLA; Protozoa. Invertebrates; Records, symptoms, damages, economic importance, population surveys; RENDEMENT DES CULTURES; RENDIMIENTO DE CULTIVOS; REQUIREMENTS; TAUX DE CROISSANCE; United States; North America; North Dakota; America; Multilocal experiment; Entomology; Growth; Insecta; Environmental factor; Many-yeared experiment; Biomass; Field experiment; Plutella xylostella; Pest; Phytophagous; Defoliation; Cruciferae; Dicotyledones; Angiospermae; Production factor; Development; Heat sum; leaf area duration; Damage; Crambe abyssinica; Loss; Ecophysiology; Oil plant(vegetal); Artificial infestation; Arthropoda; Lepidoptera; Agrometeorology; Spermatophyta; Yield; Hyponomeutidae; Invertebrata; Leaf area index
• ISSN: 0011-183X; 1435-0653
• DOI: 10.2135/cropsci1998.0011183X003800010019x

Growth analysis of crambe (Crambe abyssinica Hochst. ex R. E. Fries) is important for the use of proper production practices and adequate pest management strategies. This study evaluated the heat unit requirements and quantitative characteristics of crambe growth [leaf area index (LAI), leaf area duration (LAD), yield, and total biomass] and the impact of defoliation on yield using artificial infestation with diamondback moth (Plutella xylostella L.) (DBM) in 1993 and 1994 and manual defoliation in 1995. The heat unit accumulation from planting to physiological maturity was approximately 1350 degree-days (DD) above 2.5 degrees C. The maximum LAI and generally the maximum daily increase of biomass occurred at the onset of flowering. The yield was proportional to LAD: 238 g m-2 versus 1187 DD in 1993, 190 g m-2 versus 1010 DD in 1994, and 117 g m-2 versus 774 DD in 1995. No reduction in yield or thousand seed weight was observed in any of the infestation or defoliation experiments. The artificial defoliation experiment showed that crambe can withstand substantial injury after the start of anthesis (25-50% of leaf area lost) without a significant yield loss