Read e-book online Biological Transmission of Disease Agents PDF

By Karl Maramorosch

ISBN-10: 0123955254

ISBN-13: 9780123955258

ISBN-10: 0323160212

ISBN-13: 9780323160216

Organic Transmission of illness Agents

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Spotted wilt of tomatoes. ). /. Council Sei. hid. Research (Australia) 1, 74-77. Razvyazkina, G. M. 1953. The importance of the tobacco thrips in the development of outbreaks of tip chlorosis of Makhorka. ) Doklady Vsesoyuz. Akad. Sel'skokhoz. Nauk im. V. I. Lenina 18, 27-31. (Abstr. in Rev. Appl. Entomol. ) Sakimura, K. 1940. Thrips nigropilosus Uzel. A non-vector of the yellow spot virus. /. Econ. Entomol. 32, 883. Sakimura, K. 1946. Two species of thrips non-vectors of the spotted wilt virus.

Assuming that a latent period does exist, whether due to multiplication or diffusion, or combinations of both, the minimum and the average, within limits, will be a function of the rate at which charge is accumulated. Simons (1954), again emphasizing latent period phenomena in the transmission of pea-enation mosaic virus by M. pisi (Harris), stated that "the length of the acquisition access feeding and changes in the status of infectivity which occur during the test feeding period are limiting factors in the determination of the latent perίod.

It is interesting to note the cases on tobacco. ) are infected by T. tabaci (Khuduina, 1941; Razvyazkina, 1953; Ivantcheva-Gabrovska, 1959). 2 T. tabaci in North America and also in the Southern Hemisphere, however, has no preference for feeding upon tobacco under field conditions. T. tabaci in the Balkans and southern Russia appears to be a different strain. In North America, no outbreak of the disease on tobacco is on record, although another vector species, F. fusca, is known to be common on tobacco.

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Biological Transmission of Disease Agents by Karl Maramorosch


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