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A loss model for crops


, : A loss model for crops. Phytopathology 71(7): 685-689

Contemporary models for describing and predicting yield reduction caused by plant diseases were selected, usually with ordinary least-squares regression, to best fit the data and not necessarily to represent biological reality. A generalized nonlinear model with inherent flexibility was developed to characterize the relationship between crop loss and plant disease. In addition to providing loss predictions at various levels of disease, the model incorporates a threshold disease level below which no loss occurs, a maximum level of loss that may occur prior to the maximum amount of disease and a large family of curve shapes to depict disease-loss relationships. The model was fit to simulated and actual loss data sets. The model numerically approximated the critical-point loss models reported in the literature and also described loss for 2 disease-host systems [Cercospora leaf spot of peanut (Arachis hypogaea) caused by C. arachidicola and C. personata, and early blight of potato (Solanum %tuberosum) caused by Alternaria solani] over a 2-yr period. The availability of a single model has the advantage that losses caused by different diseases on different crops can be compared directly to an analysis of the model parameters.

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Nakao, Makoto, 2004: Muscle pressure measuring instrument for mouth cavity, adapter for mouth cavity muscle pressure measuring instrument, and mouth piece for mouth cavity muscle pressure measuring instrument. Mouthpieces 12 disposed in a mouth between a lower lip, teeth and gum, for example, are mounted to a force measuring device 11. An outer mouthpiece 16 disposed at the lip side is connected via a connecting shaft 28 to a shaft 26, which is a force...

Alkan, E.A.; Parlar, A., 2012: EMD or subepithelial connective tissue graft for the treatment of single gingival recessions: a pilot study. The combination of EMD with root-coverage procedures has been shown to promote periodontal regeneration on the exposed root surface. The aim of this randomized clinical study was to compare the efficacy of EMD with connective tissue graft (CTG) fo...

Washington, O.G., 2001: Effects of group therapy on chemically dependent women's self-efficacy. To determine effects of experiential and cognitive group therapy on self-efficacy of chemically dependent women. This quasi-experimental study indicated differences in the effects of cognitive and experiential group therapy on perceptions of gener...

Hill, A.W.; Hibbitt, K.G.; Shears, A.L., 1975: A comparison of Salmonella dublin infection in normal and endotoxin-tolerant mice. Development of S. dublin infection in normal and endotoxin-tolerant mice was studied over a 3 week period. Two strains of mice were investigated, BSVS white and CBA brown. In both strains the endotoxin-tolerant animals showed a greater resistance...

Whipp, S.C.; Littledike, E.T.; Wangsness, S., 1970: A technique for hypophysectomy of calves. Hypophysectomy was carried out on 16 male calves weighing 170-370 Ib. The technique, which involved a combination of the transtemporal and parapharyngeal approaches, is described in detail. The changes in blood hydrocortisone levels were used as a...

Rosen D.A.; Rosen K.R., 1991: Midazolam for sedation in the paediatric intensive care unit. This retrospective study examines data from 55 patients sedated in a paediatric intensive care unit (PICU) with midazolam sedation was initiated with a bolus of 0.25 mg .cntdot. kg-1 followed by a continuous infusion of 0.4-4 .mu.g .cntdot. kg-1 ....

Gonzalez, N. de los Angeles Zayas, M.; Cruz, B.; Aviles, R., 2001: Cucumis sativus L, a new host plant of various species of the Thysanoptera order, in Cuba Cucumis sativus L, nueva planta hospedera de varias especies del orden Thysanoptera, en Cuba. Boletin de Sanidad Vegetal Plagas. 1er Trimestre; 271: 117-119

Li, X-Ling.; Yi, S-Qiong.; Xu, J-Ming.; Zhang, Y.; Yingying-Feng; Chen, W.; Song, S-Tai., 2010: The sequence-dependent cytotoxic effect of trastuzumab in combination with 5-Fluorouracil or cisplatin on gastric cancer cell lines. The effect of trastuzumab on patients with HER-2/neu (HER2)-positive gastric cancer has been confirmed in a phase III clinical trial (ToGA study). However, the optimized sequence and synergic mechanism of trastuzumab and chemotherapy are not clear...

Cicció, J.F.; Soto, V.H.; Poveda, L.J., 2000: Essential oil of Lepechinia schiedeana (Lamiaceae) from Costa Rica. The composition of the essential oil isolated by steam distillation from aerial parts of the Costa Rican herb Lepechinia schiedeana (Schlecht) Vatke (Lamiaceae) collected in El Empalme, Costa Rica, was determined by capillary gas chromatography (G...

Anonymous, 1952: STRUCTURE of proteins. Nature 170(4315): 53-55