The virus-vector relationship of the tomato leafcurl virus (TLCV) and its vector,Bemisia tabaci gennadius (Hemiptera: aleyrodidae)

Butter, N. S.; Rataul, H. S.

doi:10.1007/bf02980351

Cited by 29 publications

(16 citation statements)

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“…After an acquisition access feed of 24 h, in which vectors were con®ned on infectious tomato plants, individual adult female B. tabaci transmitted TLCV to 30% of test plants. Shorter acquisition access feeds, however, resulted in much lower percentages of transmission (Butter & Rataul 1977). The number of tomato plants visited by a vector, and the extent to which probes of sucient duration occur to inoculate the host with the virus will also be critical determinants of the inoculation rate in the ®eld.…”

Section: E S T I M a T I O N O F T H E P A R A M E T E R Smentioning

confidence: 99%

“…An acquisition parameter, l, determined the rate at which noninfective vectors, X, became infective, which also depended on the availability of non-infective vectors and the abundance of infectious hosts, S. The latent period in the vector between acquisition of the virus and the ability to transmit the virus is I 30 min (Butter & Rataul 1977). It was assumed, therefore, to be negligible and no latent category was de®ned for the vector.…”

Section: T H E M O D E Lmentioning

confidence: 99%

“…The number of tomato plants visited by a vector, and the extent to which probes of sucient duration occur to inoculate the host with the virus will also be critical determinants of the inoculation rate in the ®eld. When individual viruliferous female B. tabaci were transferred every 2 days to new healthy seedlings, an average infection rate of 0´086 new infections vector ±1 day ±1 was obtained (Butter & Rataul 1977). This experimentally controlled rate of movement between plants probably approximates to the maximum rate in the ®eld, where females may probe several plants, over a period of several days.…”

Section: E S T I M a T I O N O F T H E P A R A M E T E R Smentioning

confidence: 99%

“…The virus is transmitted in a persistent manner and a single B. tabaci adult can transmit the virus to tomato plants of all ages after a single acquisition access period of 10±30 min (Butter & Rataul 1977;Seetharama Reddy, Yaraguntaiah & Sastry 1981;Ramappa 1993).…”

Section: Introductionmentioning

confidence: 99%

“…The white¯y, Bemisia tabaci (Gennadius) is the only known vector of TLCV (Vasudeva & Sam Raj 1948;Butter & Rataul 1977;Saikia & Muniyappa 1989). The virus is transmitted in a persistent manner and a single B. tabaci adult can transmit the virus to tomato plants of all ages after a single acquisition access period of 10±30 min (Butter & Rataul 1977;Seetharama Reddy, Yaraguntaiah & Sastry 1981;Ramappa 1993).…”

Section: Introductionmentioning

confidence: 99%

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Identifying control strategies for tomato leaf curl virus disease using an epidemiological model

Holt

Colvin

Muniyappa

1999

Journal of Applied Ecology

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Summary1. A number of insect vectors of plant-virus diseases make only transitory visits to the crop in which the economic eects of the disease are important. The incidence of disease in the crop depends primarily on the immigration of vectors from alternative hosts which act as a reservoir of both the virus and vector.2. An epidemiological model was developed to represent this situation and parameters were estimated for the case of tomato leaf curl virus disease (TLCVD) (Geminiviridae, Subgroup III) in India. From an analysis of the model, the following possibilities for the management of TLCVD emerged. 3. It was clear that varietal resistance to infection could be an important component of disease management but whether, once infected, the tomato plants acted as a source of inoculum had little impact on disease incidence in the tomato crop. 4. A very low rate of simulated vector immigration into a tomato crop suced to cause almost total infection. Around Bangalore, vectors may migrate into tomato crops in numbers in excess of those required for disease`saturation', explaining why, using conventional insecticides, very ecient and intensive vector control is currently required to reduce disease incidence. 5. Disease incidence was sensitive to vector mortality only when vector numbers were low. In most cases, the immigration of viruliferous vectors made disease incidence insensitive to the mortality of vectors within the tomato crop. 6. A strategy for disease management which targets more than one of the parameters to which the model proved most sensitive is likely to be necessary. In particular, the use of protective netting combined with the growing of resistant varieties has the potential to reduce both B. tabaci immigration to the crop and to reduce virus inoculation by those insects which do reach the crop.

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Section: E S T I M a T I O N O F T H E P A R A M E T E R Smentioning

confidence: 99%

Section: T H E M O D E Lmentioning

confidence: 99%

Section: E S T I M a T I O N O F T H E P A R A M E T E R Smentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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