Effect of Cultural Practices on the Citrus Rust Mite

Osburn, Max R.; Mathis, W.

doi:10.1093/jee/37.6.767

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“…oleivora infestation by Osburn and Mathis (1944). Pratt (1957), Johnson (1960), and Simanton (1960) used lOX hand lens to count citrus rust mites per field of view.…”

Section: Methods Of Samplingmentioning

confidence: 99%

“…Early researchers used linen testers and 0.5 in. holes cut in paper to help define the field of view sampled in citrus rust mite counts (Yothers and Miller, 1934;Osburn and Mathis, 1944). Later researchers used the entire field of view of a lOX hand lens (Pratt, 1957;Johnson, 1969;Simanton, 1960) to count mite populations.…”

Section: Introductionmentioning

confidence: 99%

“…Citrus rust mite populations are extremely variable from tree to tree and from various parts of the same tree. This variation in population distribution was substantiated by Osburn and Mathis (1944). Swirski (1962) felt that the recorded discrepancies were due to a lack of knowledge of density and its relationship to time and space.…”

mentioning

confidence: 97%

“…Cultural practices . Cover crops, the cultivation of annual crops in citrus groves, were studied by Osburn and Mathis (1944). They felt cover crops helped maintain a humid condition that supports parasites and especially fungi that attack the citrus rust mite.…”

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confidence: 99%

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Biological studies on the citrus tree snail Drymaeus dormani (Binney), and the citrus rust mite Phyllocoptruta oleivora (Ashmead), as well as the effect of different acaricides on the citrus rust mite

Bledsoe¹

1977

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Injury to Citrus Fruit Methods of Sampling 11 GENERAL INTRODUCTION CHAPTER I ' BIOLOGICAL STUDIES ON THE CITRUS TREE SNAIL .... water and not on nocturanl conditions. The author wishes to acknowledge the possibility that the snail may be dependent upon free water which develops on the leaf surface. Further studies examining this environmental factor are needed. Section 3. Effect of Snail Movement on Fruit Microbiota Using Scanning Electron Microscopy

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“…oleivora infestation by Osburn and Mathis (1944). Pratt (1957), Johnson (1960), and Simanton (1960) used lOX hand lens to count citrus rust mites per field of view.…”

Section: Methods Of Samplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 97%

mentioning

confidence: 99%

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Biological studies on the citrus tree snail Drymaeus dormani (Binney), and the citrus rust mite Phyllocoptruta oleivora (Ashmead), as well as the effect of different acaricides on the citrus rust mite

Bledsoe¹

1977

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Quiros-Gonzalez

2000

Experimental and Applied Acarology

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In the north-western region of Venezuela, Phyllocoptruta oleivora, Tetranychus mexicanus and Brevipalpus phoenicis are common plant-feeding mites on leaves, fruits and branches of Tahiti lime, Citrus latifolia. The population dynamics of these herbivores are affected by many factors, such as weekly treatments with wettable sulphur, particularly during the wet season, maintenance pruning of plants, irrigation with microsprinklers, induction of water stress by withholding irrigation and biotic and abiotic environmental factors. During October 1994-January 1995, 31 trees in a commercial orchard were sampled weekly in order to describe population fluctuations of plant-feeding mites (mean number of mites per leaf or fruit), before (4 weeks) and after (4 weeks) a period of 6 weeks of drought stress (no irrigation). The population density of P. oleivora increased progressively during the last 3 weeks of the irrigation period and reached a maximum of 24 mites per fruit. In contrast, the populations of the other two species, T. mexicanus and B. phoenicis, remained at the same low density as before the withholding-irrigation period. After 6 weeks without irrigation, only T. mexicanus increased, to a high mean value of 11 mites per leaf. The withholding-irrigation practice appears to affect the population size of P. oleivora towards the end of this period and that of T. mexicanus at the beginning of the re-establishment of the water supply. The highest proportion of trees (32%) was infested by T. mexicanus after the withholding-irrigation period, when irrigation was resumed, whereas the highest levels of infestation of trees by P. oleivora and B. phoenicis were 16 and 10%, respectively, during the last week of the water-stress period. Although factors affecting the dynamics of the mites in the orchard are likely to be complex, irrigation management apparently plays an important role.

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The Influence of Cover Crop Cultivation on Populations of Injurious Insects and Mites in Florida Citrus Groves

Muma¹

1961

The Florida Entomologist

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. Florida Entomological Society is collaborating with JSTOR to digitize, preserve and extend access to The Florida Entomologist.Cultural practices involving the natural ground cover or cover crop vary considerably from area to area and grove to grove in Florida. This variation is, in some instances, governed by the level of the water table or the type of soil involved. More frequently, however, cultivation is modified by the opinions of the grower. Some growers maintain weed-free groves by frequent disking, harrowing or chopping. Others permit cover crop development during the summer months but practice clean cultivation in the fall, winter and spring. Still others allow weeds and wild grasses to grow unhampered from one picking season to the next. Horticultural and agronomic reasons cited for such variations in practices include moisture conservation, soil conservation, fire protection, soil protection, tree stimulation and efficient grove management. Furthermore, many growers believe that such practices cause increases or decreases in insect and mite abundance. To date only two studies have been conducted on the influence of cover crop cultivation on insect and mite infestations. The first was an investigation by Osburn and Mathis (1944) concerning the citrus rust mite, Phyllocoptruta oleivora (Ashmead). These workers concluded that there was no difference between rust mite infestations on trees in clean cultivated plots and on trees grown in plots having a cover crop. They did, however, record stimulation of the trees in the clean cultivation plots. Two years later the same workers (Osburn and Mathis, 1946) reported markedly greater infestations of Florida red scale, Chrysomphalus aonidum (L.), on trees growing in cultivated plots than on trees in uncultivated plots. They were unable, however, to demonstrate striking differences in the percentages of parasitized scales or fungi-affected scales and concluded that tree stimulation, a result of cultivation, was the important factor in the development of larger scale infestations.The present study was conducted to obtain preliminary cultivation data on the major injurious insects and mites attacking Florida citrus and to correlate, if possible, any differences recorded with changes in the rates of parasitism or predation. EXPERIMENTAL PROCEDURE The Florida Entomologist Vol. 44, No. 2 z ? m O e> 4C

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Effect of Cultural Practices on the Citrus Rust Mite

Cited by 3 publications

References 0 publications

Biological studies on the citrus tree snail Drymaeus dormani (Binney), and the citrus rust mite Phyllocoptruta oleivora (Ashmead), as well as the effect of different acaricides on the citrus rust mite

Biological studies on the citrus tree snail Drymaeus dormani (Binney), and the citrus rust mite Phyllocoptruta oleivora (Ashmead), as well as the effect of different acaricides on the citrus rust mite

Untitled

The Influence of Cover Crop Cultivation on Populations of Injurious Insects and Mites in Florida Citrus Groves

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