Pathogens occurring on ten varieties of ryegrass at Rothamsted in 1973–74     

R. T. PLUMB  J. F. JENKYN  ROBERTA BOWEN 《Grass and Forage Science》1976,31(2):65-67

Six varieties oi Loliumperenne, three of L. multiflorum and one hybrid (L. multiflorum × L. perenne) were assessed for diseases over two harvest years. Crown rust (Puccinia coronata) and mildew (Erysiphe graminis) occurred on some varieties in 1973. Leaf spotting (Drechslera spp.) was common, but slight on most varieties, in both years. Ryegrass mosaic virus (RMV) and its mite vector, Abacarus hystrix were present on all varieties in the second year. The relative susceptibility of varieties to RMV was similar in the field and in glasshouse tests.  相似文献   

Treatment of a Periarticular Tibial Fracture in a Foal with a Hybrid External Fixator   总被引：1，自引：0，他引：1  

ROBERTA FERRO DE GODOY  DScVM    RICHARD R. FILGUEIRAS  MS    LÍLIAN A. GONTIJO  DVM    FÁBIO HENRIQUE BEZERRA XIMENES  DVM    LIANA VILLELA DE GOUVÊA  DVM    CRISTIANE DA SILVA PEREIRA  DVM    RICARDO M. ALMEIDA  MS    CECI RIBEIRO LEITE  DVM    ANTÔNIO RAPHAEL T. NETO  DScVM    JOSÉ RENATO JUNQUEIRA BORGES  DScVM 《Veterinary surgery : VS》2009,38(5):650-653

Objective— To report repair of a right proximal tibial Salter-Harris type II fracture in a foal with a hybrid external fixator (HEF).
Study Design— Case report.
Animals— A 5-month-old male foal.
Methods— After open surgical reduction, an HEF built with wires, 2 half-rings, 3 half-threaded connecting rods, and Schanz pins was used to stabilize the fracture.
Results— Immediately after surgery, the foal had relatively good weight bearing. The HEF was removed at 60 days after radiographic confirmation of healing.
Conclusions— HEF can be used to stabilize a proximal tibial Salter-Harris type II fracture in a 5-month-old foal.
Clinical Relevance— HEF should be considered as another option for repair of proximal tibial Salter-Harris type II fractures in foals.  相似文献   

Effect of sample drying on the determination of fibre and water-soluble carbohydrates of maize silage     

ROBERTA PICCAGLIA  GUIDO C. GALLETTI 《Grass and Forage Science》1987,42(3):319-321

Neutral detergent fibre (NDF), acid detergent fibre and water-soluble carbohydrates (WSC) were assayed in wet and dry samples of maize silage, either treated with NaOH or untreated (control), before and after ensiling.
Statistically significant effects of drying at 60°C were observed in WSC, NDF and cellulose estimations expressed on the basis of 105°C dry matter.
It could therefore be preferable to analyse wet samples, as these are not altered by the degradations induced by oven-drying and are more representative of the original condition of the forage.  相似文献   

Gibrat's Law in the “Third Italy”: Firm Growth in the Veneto Region     

ROBERTA PIERGIOVANNI 《Growth and change》2010,41(1):28-58

According to Gibrat's Law of Proportionate Effect, the growth rate of a given firm is independent of its size at the beginning of the period examined. While earlier studies tended to confirm the Law, more recent research generally rejects it. The aim of this paper is to test whether Gibrat's Law is confirmed, for the 1995–2005 period, for a large sample of firms active in the Veneto region of Italy. Controlling for firm age and size, findings show that the Law is not confirmed in the early stages of a firm's life cycle, with younger firms growing faster than established ones, whereas it cannot be rejected once a given threshold in terms of age is reached. These findings are consistent with the life cycle theory of the firm and with the hypothesis that fast growing small and medium‐sized enterprises may have played a role in the evolution and the structural transformation of local systems in the “Third Italy” during the 1990s and early 2000s.  相似文献