Research and Development of High and Ultra-low volume Sprays to Control Tomato Leaf Diseases at Samaru,Nigeria     

J. G. Quinn  D. R. Johnstone  K. A. Huntington 《国际虫害防治杂志》2013,59(4):388-395

Abstract

Fungicide spray trials showed that high volume applications (1121 lha) of mancozeb, captafol and vondozeb reduced foliage and stem disease and substantially increased marketable yields of rain-fed tomatoes in northern Nigeria. The results suggest that captafol had a more persistent fungicidal action as there was no yield difference between the 7 and 14 day frequencies of application. U.I.v. methods (<12 l/ha) using three fungicides were compared with high volume treatments. The u.I.v. captafol treatment was particularly effective. An assessment was made of droplet distribution in relation to atomiser disc rotation speed and the height of carriage of the sprayer.  相似文献   

Effects of Hormonal Supplementation on Nuclear Maturation and Cortical Granules Distribution of Canine Oocytes During Various Reproductive Stages     

M Apparicio  AE Alves  EA Pires‐Butler  APC Ribeiro  GJ Covizzi  WRR Vicente 《Reproduction in domestic animals》2011,46(5):896-903

The aim of this study was to evaluate the effects of hCG, progesterone and oestradiol supplementation on nuclear and cytoplasmic maturation of canine oocytes cultured for 24, 48, 72 and 96 h. Oocytes obtained from 18 healthy bitches were divided into three groups according to their reproductive status (follicular, luteal and anoestrus stages) and cultured in TCM 199 + 25 UI/ml of hCG + 1 μg/ml of progesterone + 1 μg/ml of 17‐β oestradiol or without hormonal supplementation (control) for different periods. Then, they were stained with FITC‐LCA‐Hoescht for chromatin configuration and cortical granules distribution and evaluated under an epifluorescence microscope. Culture time and the influence of different stages of the oestrous cycle were also evaluated. The present study demonstrated that there was no significant difference among the reproductive stages. With regards to culture medium, only oocytes from the supplemented medium were able to complete meiosis; however, significant difference was only noticed in the percentage of MI stage oocytes (p < 0.05) in the follicular and luteal group at 72 h of culture. Most oocytes in germinal vesicle, germinal vesicle breakdown and metaphase I stage had cortical granules distributed throughout the cytoplasm (immature pattern), irrespective of the culture period (p < 0.05). Cortical granules distributed immediately beneath the plasma membrane (mature) was only observed in metaphase II stage oocytes, but not all of them presented matured cytoplasm. Our results reveal that cortical granules distribution in canine oocytes matured in vitro did not progressed in correspondence with nuclear stage changes and are in accordance with those from other species.  相似文献   

Response of Thawed Epidi dymal Red Deer Spermatozoa to Increasing Concentrations of Hydrogen Peroxide,and Importance of Individual Male Variability     

AE Domínguez‐Rebolledo  F Martínez‐Pastor  AF Bisbal  JL Ros‐Santaella  O García‐Álvarez  A Maroto‐Morales  AJ Soler  JJ Garde  MR Fernández‐Santos 《Reproduction in domestic animals》2011,46(3):393-403

Oxidative stress represents a challenge during sperm manipulation. We have tested the effect of increasing hydrogen peroxide (H₂O₂) levels on red deer spermatozoa after cryopreservation, and the role of male‐to‐male variation in that response. In a first experiment, eight thawed samples were submitted to 0, 25, 50, 100 and 200 μm H₂O₂ for 2 h at 37°C. Intracellular reactive oxygen species (H₂DCFDA‐CM) increased with H₂O₂ concentration, but we only detected a decrease in sperm function (motility by CASA and chromatin damage by sperm chromatin structure assay) with 200 μm . Lipoperoxidation assessed by the thiobarbituric acid reactive substance (TBARS) method increased slightly with 50 μm H₂O₂ and above. In a second experiment, samples from seven males were submitted to 0 and 200 μm H₂O₂ for 2 h, triplicating the experiment within each male. Males differed at thawing and regarding their response to incubation and H₂O₂ presence. We found that the kinematic parameters reflected male‐to‐male variability, whereas the response of the different males was similar for lipid peroxidation and viability. A multiparametric analysis showed that males grouped differently if samples were assessed after thawing, after incubation without H₂O₂ or after incubation with H₂O₂. Red deer spermatozoa are relatively resilient to H₂O₂ after thawing, but it seems to be a great male‐to‐male variability regarding the response to oxidative stress. The acknowledgement of this individual variability might improve the development of optimized sperm work protocols.  相似文献   

In this issue – November 2011     

AE Jackson 《Australian veterinary journal》2011,89(11):423-424

H1N1 influenza in pigs in Australia · Postnatal neurogenetic disorders · Deltamethrin collar for paralysis ticks in dogs · Myocardial laceration from sewing needle · Physiotherapy for tetanus in a foal · Morbillivirus in a bottle‐nosed dolphin · Sarcoptic manage in a swamp wallaby · Psychological health of veterinarians in Australia · History of the Australian College of Veterinary Scientists  相似文献   

Validation of a Leishmania infantum ELISA rapid test for serological diagnosis of Leishmania chagasi in dogs     

Marcondes M  Biondo AW  Gomes AA  Silva AR  Vieira RF  Camacho AA  Quinn J  Chandrashekar R 《Veterinary parasitology》2011,175(1-2):15-19

Canine visceral leishmaniasis (CVL) is caused by Leishmania donovani complex parasites including L. donovani, Leishmania infantum and Leishmania chagasi. As some studies suggest that L. chagasi and L. infantum may be very similar or even the same species, the aim of the present study was to evaluate a commercial rapid ELISA test, originally designed for L. infantum, in the diagnosis of CVL in dogs naturally infected by L. chagasi. A total of 400 serum canine samples, including 283 positive dogs for CVL from an endemic area, 86 clinically healthy dogs from a non-endemic area and 31 dogs seropositive for confounding infectious agents (Trypanosoma cruzi, Toxoplasma gondii, Neospora caninum, Babesia canis and Ehrlichia canis) were used for test validation. An overall sensitivity of 94.7% (95% CI=91.41-97.01%) and specificity of 90.6% (95% CI=83.80-95.21%) was found, with a high degree of agreement (k=0.8445) to the indirect ELISA. When confounding infectious diseases were excluded, specificity increased to 100% (95% CI=95.8-100%), with a higher degree of agreement (k=0.8928). In conclusion, the commercial kit designed for L. infantum was a highly sensitive and specific device for detection of L. chagasi infection in dogs, which indicates high immunoreactivity similarities between L. infantum and L. chagasi.  相似文献   

Anaplastic nephroblastoma with peritoneal metastasis in an adult female Sprague Dawley rat     

Lisa Quinn  James G Fox  Joanna Joy  Sureshkumar Muthupalani  Sebastian E Carrasco 《Journal of toxicologic pathology》2020,33(4):297

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Contributing factors to surgical site infection after tibial plateau leveling osteotomy: A follow-up retrospective study     

Chris R. M. Hagen BSc  DVM  Ameet Singh DVM  DVSc  DAVCS  J. Scott Weese DVM  DVSc  DACVIM  Quinn Marshall BSc  Alex zur Linden DVM  DACVR  Thomas W. G. Gibson DVM  DVSc  DACVS  DACVSMR 《Veterinary surgery : VS》2020,49(5):930-939

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Lightning damage to potatoes     

A. E. W. Boyd  J. Gilmour  I. H. Clark  C. E. Quinn 《Potato Research》1979,22(3):251-252

Summary Two distinct round patches were observed in a potato field where the haulm showed symptoms like those of blackleg. The remainder of the field was in vigorous growth. Affected stems had long cracks andErwinia carotovora var.atroseptica was isolated from some. This had probably developed subsequently on damaged tissue and no rotting was apparent below soil level. Most of the tubers were decayed but noErwinia and only green pseudomonads were detected. Local meteorological records showed that thunderstorms occurred on only one day (1 August) in the six weeks before observation of the field symptoms. It was concluded from all evidence that the condition described was caused by a lightning strike on that day.  相似文献   

Distribution and significance of diplandroids among the diploid solanums   总被引：1，自引：0，他引：1  

A. A. Quinn  D. W. S. Mok  S. J. Peloquin 《American Journal of Potato Research》1974,51(1):16-21

Clones of several diploid species capable of generating diplandroids (2n pollen) were identified by screening for the occurrence of 2n pollen. Diplandroid production was detected inSolatium bukasovi, S. canasense,S. cardiophyllum, S. chacoense, S. leptostigma, S. megistacrolobum, S. tarijense, S. tuberosum Group Phureja and Group Stenotomum. Parallel spindles at Ana II was the mechanism producing 2n pollen inS. chacoense, Group Phureja, and Group Stenotomum. The widespread distribution both taxonomically and geographically suggests a possible role for diplandroids in evolution. It also encourages exploration of a proposed breeding method in which tetraploids are generated from 2x × 2x matings.  相似文献   

BEVA primary care clinical guidelines: Wound management in the horse     

Sarah L. Freeman  Neal M. Ashton  Yvonne A. Elce  Anna Hammond  Anna R. Hollis  Greg Quinn 《Equine veterinary journal》2021,53(1):18-29

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