The Spatial Distribution of Insect‐borne Plant‐virus Diseases

Gregory, P. H.; Read, D. R.

doi:10.1111/j.1744-7348.1949.tb06943.x

Cited by 36 publications

(22 citation statements)

References 6 publications

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“…Since there appeared to be no directionality in the dispersal of the marked L. sericata from the release point, the dispersal of the flies can be represented by a relatively simple model using such a plot. A wide range of models has been found to describe the dispersal of a variety of insect species (Wolfenbarger, 1946;Gregory & Read, 1949;Paris, 1965;Hawkes, 1972). Several of these models were fitted to the data using a least squares non-linear regression.…”

Section: Mean Dispersal Rate Imentioning

confidence: 99%

Estimates of population density and dispersal in the blowflyLucilia sericata(Diptera: Calliphoridae)

Smith

Wall

1998

Bull. Entomol. Res.

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To investigate the population density and dispersal of the sheep blowfly Lucilia sericata (Meigen) mark-release-recapture trials were carried out in lowland pastures in south west England. In three trials, 2142,1351 and 451 fluorescent dust marked flies were released of which 4%, 14% and 10% were recaptured using a grid of sticky, odour-baited targets, placed between 8 m and 1000 m from the release point. There was no significant effect of wind direction on dispersal pattern and no apparent directional movement of the flies from the release point. Using the method described by Hawkes (1972) the mean distance travelled by all the flies on the first day of each of the three trials was calculated to be 108 m, 128 m and 137 m respectively. Using the method described by Fletcher (1974) the mean distances travelled were calculated to be 135 m (±42), 118 m (±27) and 183 m ( + 61) on the first day of each of the three trials, respectively. The median distances travelled by the flies on the first day of each of the three trials were calculated to be 109 m, 130 m and 150 m, respectively. A Lincoln Index was used to estimate the population density of wild female L. sericata.

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Section: Mean Dispersal Rate Imentioning

confidence: 99%

Estimates of population density and dispersal in the blowflyLucilia sericata(Diptera: Calliphoridae)

Smith

Wall

1998

Bull. Entomol. Res.

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“…Much attention has been devoted to gradients of plant diseases in relation to distribution of source of pathogens (Gregory & Read, 1949;Gregory, 1968;Thresh, 1976). However, although ACMV could be transmitted from diseased M .…”

Section: In Each Experiments With Potted Cassava Plants In Fieldsmentioning

confidence: 99%

Field studies on the spread of African cassava mosaic

Fargette¹,

Fauquet²,

Thouvenel³

1985

Annals of Applied Biology

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The spread of African cassava mosaic disease (ACMV) into healthy cassava fields was recorded at weekly intervals. In addition, 21 yellow water traps were placed in one field and the number of whiteflies caught was recorded twice a week. The number of Bemisia spp. feeding on cassava was also estimated. The results indicate that the pattern of disease spread is related to the pattern of infestation with Bemisia.Airborne whiteflies carried by the south-west prevailing wind alighted preferentially on cassava plants along the upwind edges (south and west borders) of the plantings. The pattern of incidence of mosaic disease resembled that of whiteflies. Along the SW-NE diagonal, there was a gradient of disease incidence with a maximum at the SW corner block. Similar gradients occurred in three different fields and they were maintained throughout the 6-month study, although gradually flattening with time. There were indications that the reservoirs both of the virus and of the vectors were located some distance upwind from the experimental fields.

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“…Gregory observed infection gradients while working on insect-vectored virus diseases of potatoes (Gregory and Read, 1949). His interests turned to fungal spores and he read widely on the subject, even learning Russian to translate a 1935 paper by Stepanov.…”

Section: Gregory's Basic Principals Of Aerobiologymentioning

confidence: 99%

The Air Spora

West¹,

Lacey²

2006

117

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All Rights Reserved © 2006 SpringerNo part of this work may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording or otherwise, without written permission from the Publisher, with the exeption of any material supplied specifically for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work.Printed in the Netherlands.

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The Spatial Distribution of Insect‐borne Plant‐virus Diseases

Cited by 36 publications

References 6 publications

Estimates of population density and dispersal in the blowflyLucilia sericata(Diptera: Calliphoridae)

Estimates of population density and dispersal in the blowflyLucilia sericata(Diptera: Calliphoridae)

Field studies on the spread of African cassava mosaic

The Air Spora

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