Biology and Control of the Grape Mealybug, Pseudococcus Maritimus (Ehrhorn), (Homoptera:Pseudococcidae) in Southcentral Washington PDF Download
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Author: Elizabeth Willkie Grimes
Publisher:
ISBN:
Category : Grapes
Languages : en
Pages : 80
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Author: Elizabeth Willkie Grimes
Publisher:
ISBN:
Category : Grapes
Languages : en
Pages : 80
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Author: Jonathan Scott O'Hearn
Publisher:
ISBN:
Category : Animals as carriers of disease
Languages : en
Pages : 85
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Book Description
Grapevine leafroll disease (GLD) is the most economically important viral disease in wine grapes (Vitis vinifera L.). In Washington State vineyards, the grape mealybug, Pseudococcus maritimus (Ehrhorn; Hemiptera: Pseudococcidae), is the primary vector of Grapevine Leafroll associated Viruses (GLRaVs) which are the causal agents of GLD. While grape mealybug is a known vector, it was unknown how efficient this vector was at spreading GLD.Rearing laboratory colonies of grape mealybug has proven difficult. Several host plants were tested to determine their suitability for use as an alternate host plants for laboratory colonies of grape mealybug. Of the plants tested, colonies of grape mealybug were successful on pumpkin (Cucurbita pepo cv 'Connecticut field') leaves and vines. Mealybugs were able to develop from the crawler stage, through developmental instars, and adults were able to reproduce viable offspring.In greenhouse transmission bioassays we tested infestations of five and one GLRaV-3 infected grape mealybug crawlers per grapevine (cv. 'Chardonnay') to see if transmission occurred. The five grape mealybug per vine treatment had transmission occurred in six out of the twenty recipient vines by year two. The one grape mealybug per vine treatment had transmission occurred in two out of the twenty recipient vines in both the first and second year tested. Our experiment confirmed an earlier predicted estimate that feeding by a single GLRaV-3 infected grape mealybug had the probability of transmission of 0.10 ℗ł 0.003.Current control recommendations for slowing the spread of GLRaVs include one to two applications of insecticides to reduce vector populations. Systemic insecticides require the insect to feed before death or paralysis occurs. It was unknown if systemic insecticides could paralyze or kill grape mealybug quickly enough to reduce their ability to vector GLRaVs. Hence, we tested imidacloprid, spirotetramat, and flupyradifurone to see if these insecticides would have any effect on grape mealybug's efficiency to vector GLRaV-3 on treated grapevines. We conclude that these systemic insecticides do not convey any additional protection to grapevines. However, these insecticides are still useful for reducing vector populations and indirectly reduce the potential spread of GLRaVs among vines in vineyards.
Author: T. R. Srinivasan
Publisher:
ISBN:
Category :
Languages : en
Pages : 109
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Author: Douglas John Williams
Publisher: Oxford University Press, USA
ISBN:
Category : Nature
Languages : en
Pages : 652
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Book Description
History (Background to the studey, scope of the work and collections studied); Economic importance; Morphology; Systematics (relationshisp and classification, definition of the family Pseudococcidae).
Author: M. Kosztarab
Publisher: Springer Science & Business Media
ISBN: 9400940459
Category : Science
Languages : en
Pages : 472
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Book Description
This book is dedicated to the scientists whose professional devotion and accomplish ments in research on scale insects of the area made the compilation of this book possible. This book has two primary objectives: (1) to enable interested workers, who are not specialists of scale insects, to recognize and indentify these to families, genera and species; and (2) to provide information on the life cycle, host-plant range, natural enemies, geographical distribution, economic importance for each known species from Central Europe, and to provide a bibliography on each taxa covered. Scale insects are important pests of fruit and nut trees, forest vegetation, woody ornamentals, greenhouse and indoor plants. World-wide losses and increased production costs attributed to scale insects are estimated to reach $5 billion annually. It is difficult to recognize them because of their microscopic size and hidden habits. Identification of pest species enables plant growers to check appropriate reference sources for biological information and to select control methods.
Author: Douglas John Williams
Publisher:
ISBN: 9789834005368
Category : Entomology
Languages : en
Pages : 896
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Book Description
Author: Yair Ben-Dov
Publisher:
ISBN: 9781898298076
Category : Mealybugs
Languages : en
Pages : 686
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Book Description
Mealybugs are of great economic importance to man in view of their damage to agricultural crops such as cassava, potatoes, vegetables, rice, and citrus and deciduous fruit trees. This book covers 1947 species of mealybugs placed in 28 genera. It should have world-wide appeal to professionals.
Author: Entomological Society of British Columbia
Publisher:
ISBN:
Category : Insect pests
Languages : en
Pages : 52
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Author: D. H. R. C. Reinhardt
Publisher:
ISBN:
Category : Fruit trade
Languages : en
Pages : 332
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Book Description
Author: Manuela Branco
Publisher:
ISBN: 9789728669331
Category :
Languages : en
Pages : 322
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Book Description
