Title Page
 Table of Contents
 Temperature effects on the development...
 Spatial distribution of Oligonychus...
 Evaluation of four acaricides and...
 Biographical sketch

Title: Biology, spatial distribution, and control of Oligonychus (Oligonychus) ilicis (McGregor) (Acarina: Tetranychidae on Ilex crenata 'Hetzii'
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00099243/00001
 Material Information
Title: Biology, spatial distribution, and control of Oligonychus (Oligonychus) ilicis (McGregor) (Acarina: Tetranychidae on Ilex crenata 'Hetzii'
Alternate Title: Oligonychus (Oligonychus) ilicis
Ilex crenata
Physical Description: v, 88 leaves : graphs ; 28 cm.
Language: English
Creator: Childs, Gail Hutchison, 1946- ( Dissertant )
Habeck, Dale H. ( Thesis advisor )
Ashley, Thomas R. ( Reviewer )
Barrick, William E. ( Reviewer )
Kerr, Stratton ( Reviewer )
Fry, Jack L. ( Degree grantor )
Publisher: University of Florida
Place of Publication: Gainesville, Fla.
Publication Date: 1980
Copyright Date: 1980
Subjects / Keywords: Entomology and Nematology thesis Ph. D
Plant mites -- Control   ( lcsh )
Hollies -- Diseases and pests   ( lcsh )
Dissertations, Academic -- Entomology and Nematology -- UF
Genre: bibliography   ( marcgt )
non-fiction   ( marcgt )
Abstract: Studies were conducted to determine the temperature effects on the development and reproduction of the southern red mite, Oligonychus ( Oligonychus ) ilicis (McGregor) reared on holly, Ilex crenata 'Hetzii,' to ascertain the mites' spatial distribution on field grown I. crenata, and to evaluate selected acaricides for residual control of 0. (0. ) ilicis . Southern red mites completed development through all stages under constant temperatures ranging from 15.5 to 35 °C. In general, developmental times of all stages and adult longevity decreased as temperatures increased. Males developed more rapidly than females at all temperatures except 2 6.5°C. The developmental curves for all stages were cubic. Mortality curves for males and females dropped more abruptly as temperature increased. The survival rate of 0. (0. ) ilicis was greatest for eggs, and the highest mortality occurred in the larval stage. The net reproductive rate was highest (7.0961) at 26.5°C. The mean generation time was shortest (2.5695) at 35° and longest (7.3119) at 21°C. The intrinsic rate of natural increase was greatest (0.4694) at 26.5°C. The number of degree days required for the development of each immature stage at 6 different temperatures indicated that the egg stage required the greatest amount of heat. Southern red mites were found predominantly on the under surface of I_. crenata. The mean number of mites in the upper portion of the plants differed significantly at the 1% level from the means for the lower and middle heights. Means for eggs did not differ with regard to height. Significantly more eggs and mites were located in the inner zone of the plants. More eggs and mites were found in the north and south quadrants than in the east and west quadrants. The optimum sampling location on I_. crenata appeared to be in the inner zone and at the upper height in either the north or south quadrants. Hexakis (H) , propargite (P) , dicofol (D) , and naled (N) and combinations of these 4 acaricides were evaluated for control of 0. (0.) ilicis on field grown holly. Hexakis provided the best control after three weeks of the compounds sprayed singly. Combinations of compounds offering equally good residual action were H+p, H+D, H+P+D, H+P , N, P+D+N, and H+P+D+N.
Statement of Responsibility: by Gail Hutchison Childs.
Thesis: Thesis--University of Florida.
Bibliography: Bibliography: leaves 83-87.
General Note: Typescript.
General Note: Vita.
 Record Information
Bibliographic ID: UF00099243
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: alephbibnum - 000014226
oclc - 06324281
notis - AAB7425


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Table of Contents
    Title Page
        Page i
        Page ii
    Table of Contents
        Page iii
        Page iv
        Page v
        Page 1
        Page 2
    Temperature effects on the development and reproduction of the southern red mite
        Page 3
        Page 4
        Page 5
        Page 6
        Page 7
        Page 8
        Page 9
        Page 10
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        Page 37
        Page 38
        Page 39
        Page 40
        Page 41
        Page 42
        Page 43
    Spatial distribution of Oligonychus (Oligonychus) ilicis (McGregor) on field grown Ilex crenata 'Hetzii'
        Page 44
        Page 45
        Page 46
        Page 47
        Page 48
        Page 49
        Page 50
        Page 51
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        Page 60
        Page 61
        Page 62
        Page 63
        Page 64
        Page 65
        Page 66
    Evaluation of four acaricides and combinations for control of southern red mite on Ilex crenata 'Hetzii'
        Page 67
        Page 68
        Page 69
        Page 70
        Page 71
        Page 72
        Page 73
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        Page 81
        Page 82
        Page 83
        Page 84
        Page 85
        Page 86
        Page 87
    Biographical sketch
        Page 88
        Page 89
        Page 90
        Page 91
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