An Additional Phytosanitary Cold Treatment AgainstCeratitis capitata(Diptera: Tephritidae) in ‘Oroblanco’ Citrus Fruit

2017 ◽  
pp. tow291 ◽  
Author(s):  
Yoav Gazit ◽  
Roy Kaspi
Keyword(s):  
Author(s):  
Tim G Grout ◽  
Kim C Stoltz

Abstract Although elevated levels of carbon dioxide have been used in controlled atmosphere treatments with low oxygen levels for a number of deciduous crops, the use of much higher concentrations of carbon dioxide followed by a short cold treatment for citrus was only suggested as a viable option for disinfestation in 2005. Carbon dioxide alone, for a period of 24 h at concentrations up to 70% in air caused variable levels of mortality of Thaumatotibia leucotreta (Meyrick) larvae in citrus, but never completely controlled this pest. The susceptibility to carbon dioxide appeared to vary more with the batch of T. leucotreta eggs than with different citrus cultivars. By following CO2 fumigation with a short cold treatment, complete control of this pest was achieved and the results with sequential treatments were more consistent. The efficacy of the combined treatment was reduced when it took ≥12 h to move fruit after fumigation into a cold room at 2°C, or if the temperature was not reduced below 12°C within 24 h after fumigation. In these cases, the benefit of the short cold treatment was lost and mortality was similar to CO2 fumigation alone. These results hold promise for the development of a shorter commercial treatment to meet quarantine restrictions against this pest in citrus.


2015 ◽  
pp. 1685-1692 ◽  
Author(s):  
Antonella Tauriello ◽  
Giovanni Carlo Di Renzo ◽  
Giuseppe Altieri ◽  
Maria Concetta Strano ◽  
Francesco Genovese ◽  
...  
Keyword(s):  

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1174c-1174 ◽  
Author(s):  
Laurie G. Houck ◽  
Joel F. Jenner ◽  
Jan Bianchi

An approved quarantine treatment for Tephritid fruit fly control of citrus fruit requires fruit be held at 0.0-2.2C for 10-22 days, depending on fruit fly species involved and actual temperature attained. However, this treatment causes chilling injury (CI) in California-Arizona desert lemons harvested in late summer or early autumn. We found that temperatures at which lemons are held before cold treatment affects the susceptibility of lemon fruit to CI. Commercially packed lemons obtained from Yuma, AZ packinghouses in Sept.-Nov. 1987 and 1988 were held at 1C for 3 or 6 weeks, or cured for one week at 5, 15 or 30C, or at 15C for one week, followed by 30C for one week, before receiving the 1C cold treatment. Lemons cured one week at 5 or 15C before the cold treatment developed at least 25-30% less CI during 4 weeks peat treatment storage at 10C than noncured fruit. The other curing treatments were not as effective for reducing CI.


2016 ◽  
Vol 109 (4) ◽  
pp. 1578-1585 ◽  
Author(s):  
S. D. Moore ◽  
W. Kirkman ◽  
S. Albertyn ◽  
C. N. Love ◽  
J. A. Coetzee ◽  
...  

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
Y Kobayashi ◽  
H Takemoto ◽  
Z Fu ◽  
E Shimizu ◽  
Y Kinjo

1975 ◽  
Vol 34 (03) ◽  
pp. 780-794 ◽  
Author(s):  
Dianne M Kenney ◽  
Francis C Chao ◽  
James L Tullis ◽  
Gail S Conneely

SummaryThe uptake and binding of antimitotic alkaloid colchicine has been demonstrated in washed preparations of human platelets. A silicone oil technique was adapted so that both uptake and binding of 14C-colchicine were examined in the same platelet preparations. The time dependence and amount of colchicine taken up and bound by different platelet preparations during a 90 to 120 min incubation period were highly reproducible. Both colchicine uptake and binding by intact platelets, and colchicine binding by preparations of lysed platelets were specific and temperature dependent. Colchicine uptake was slowly reversible. Magnesium and GTP enhanced colchicine binding by lysed platelet preparations but calcium decreased binding.Exposure of platelets to either cold (4° C) or to thrombin, which disrupt platelet microtubules, produced significant increases in colchicine uptake and binding. The thrombin effect was maximal at 37° C and resulted in a greater increase in uptake and binding than that produced by either cold treatment alone or, by cold treatment followed by incubation with thrombin at 37° C. The amount of increase in uptake and binding produced by thrombin was independent of both thrombin (1–5 Units/109 platelets) and colchicine concentrations (1–50 × 10−6M).It is postulated that thrombin may initiate the formation, or make available, colchicine binding sites (microtubule subunits) within platelets.


2018 ◽  
Vol 1 (2) ◽  
pp. 17-23
Author(s):  
Takialddin Al Smadi

This survey outlines the use of computer vision in Image and video processing in multidisciplinary applications; either in academia or industry, which are active in this field.The scope of this paper covers the theoretical and practical aspects in image and video processing in addition of computer vision, from essential research to evolution of application.In this paper a various subjects of image processing and computer vision will be demonstrated ,these subjects are spanned from the evolution of mobile augmented reality (MAR) applications, to augmented reality under 3D modeling and real time depth imaging, video processing algorithms will be discussed to get higher depth video compression, beside that in the field of mobile platform an automatic computer vision system for citrus fruit has been implemented ,where the Bayesian classification with Boundary Growing to detect the text in the video scene. Also the paper illustrates the usability of the handed interactive method to the portable projector based on augmented reality.   © 2018 JASET, International Scholars and Researchers Association


2012 ◽  
Vol 67 (2) ◽  
pp. 106-110
Author(s):  
P. Stratton
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document