Handbook On The Cassava Green Mite Mononychellus Tanajoa In Africa

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Handbook On The Cassava Green Mite Mononychellus Tanajoa In Africa

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Author : John Stephen Yaninek
language : en
Publisher: IITA
Release Date : 1989

Handbook On The Cassava Green Mite Mononychellus Tanajoa In Africa written by John Stephen Yaninek and has been published by IITA this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Cassava categories.

Integrated Pest Management Of Cassava Green Mite

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Author :
language : en
Publisher:
Release Date : 1984

Integrated Pest Management Of Cassava Green Mite written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Cassava categories.

Movement And Distribution On Cassava Of The Cassava Green Mite Mononychellus Tanajoa Acari Tetranychidae And Its Predator The Mite Neoseiulus Idaeus Acari Phytoseiidae

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Author :
language : en
Publisher:
Release Date : 1990

Movement And Distribution On Cassava Of The Cassava Green Mite Mononychellus Tanajoa Acari Tetranychidae And Its Predator The Mite Neoseiulus Idaeus Acari Phytoseiidae written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.

Biological Control And Host Plant Resistance To Control The Cassava Mealybug And Green Mite In Africa

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Author : Hans Rudolf Herren
language : en
Publisher: IITA
Release Date : 1983

Biological Control And Host Plant Resistance To Control The Cassava Mealybug And Green Mite In Africa written by Hans Rudolf Herren and has been published by IITA this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Cassava categories.

Biological Control In Ipm Systems In Africa

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Author : P. Neuenschwander
language : en
Publisher: CABI
Release Date : 2003

Biological Control In Ipm Systems In Africa written by P. Neuenschwander and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Technology & Engineering categories.

Annotation. Biological control has made a major contribution to integrated pest management (IPM) in Africa, but its documentation has been scattered and often under-reported. This book provides a review of the most important studies, including not only successes, but also on-going challenges. The focus is on arthropod pests and weeds, but diseases are also covered where significant. In 24 chapters, case studies and promising research results are presented that cover biocontrol by naturally occurring agents, by exotic agents or by seasonal manipulation. This book provides a valuable resource for scientists worldwide. It is particularly useful for pest control professionals working in Africa.

Agricultural Acarology

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Author : Marjorie A. Hoy
language : en
Publisher: CRC Press
Release Date : 2016-04-19

Agricultural Acarology written by Marjorie A. Hoy and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-19 with Science categories.

Written by a globally prominent entomologist, Agricultural Acarology: Introduction to Integrated Mite Management provides tools for developing integrated mite management programs for agriculture, including management of plant-feeding mites, mites attacking bees and livestock, and stored products. Emphasizing the biology, ecology, behavior, and dive

Investigations Toward Implementation Of Neozygites Tanajoae Sp Nov As A Classical Biological Control Agent Against The Cassava Green Mite In Africa

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Author : Italo Delalibera
language : en
Publisher:
Release Date : 2002

Investigations Toward Implementation Of Neozygites Tanajoae Sp Nov As A Classical Biological Control Agent Against The Cassava Green Mite In Africa written by Italo Delalibera and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.

Cassava, Manihot esculenta Crantz (Euphorbiaceae), is a major food crop in sub-Saharan Africa. Cassava green mite (CGM), Mononychellus tanajoa (Acari: Tetranychidae), became one of the most important pests of this crop in Africa after its introduction from the Neotropics. The fungal pathogen Neozygites tanajoae Delalibera, Humber & Hajek sp. nov. is one of the most important natural enemies of CGM in Brazil, where cassava is native. The introduction of efficient isolates from Brazil to Africa has great potential for reducing losses caused by CGM. In this dissertation I present important steps toward the implementation of N. tanajoae as a classical biocontrol agent of CGM in Africa; selection of efficient isolates and development of in vitro production and preservation techniques for N. tanajoae cultures. To identify potential isolates from South America to be released in Africa, several bioassays were conducted comparing 23 N. tanajoae isolates and 2 N. floridana isolates from Brazil, Colombia and Benin. Most isolates from Brazil were highly virulent and infected only CGM. Sixteen isolates caused more than 89% mortality and greater than 62% mummification. The median time to mummification ranged from 4.4 to 6.7 days. Significant differences in the number of primary conidia and capilliconidia produced by Brazilian isolates were observed after 12 hours at 100% RH. Some Brazilian isolates produced significantly more primary conidia than the African isolates. Isolation methods, culture media for in vitro production and a protocol for long term storage of hyphal bodies of N. tanajoae are reported here for the first time. Continuous growth of N. tanajoae was achieved using IPL-41 + 5 -10% fetal bovine serum + 0.3% lactalbumin hydrolysate + 0.3% yeastolate. Cultures of N. tanajoae can only be preserved at ultra-low temperatures of -80°C or -196°C, using I% trehalose + 2% dimethyl sulfoxide as cryoprotective agents. N. tanajoae has traditionally been referred to as N. floridana; however, I present data justifying its designation as a new species of Neozygites. N. tanajoae can be readily distinguished from N. floridana based on SSU rDNA sequences, host range, growth in culture media, ability to withstand cryopreservation and tolerance to cold temperature (4°C).

Ecology And Molecular Characterization Of Neozygites Tanajoae Entomophthorales Neozygitaceae A Fungal Pathogen Of The Cassava Green Mite

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Author : Bonaventure Agboton
language : en
Publisher: Cuvillier Verlag
Release Date : 2009-03-19

Ecology And Molecular Characterization Of Neozygites Tanajoae Entomophthorales Neozygitaceae A Fungal Pathogen Of The Cassava Green Mite written by Bonaventure Agboton and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-03-19 with Science categories.

For the biological control of the cassava green mite (Mononychellus tanajoa, Bondar), Brazilian strains of the entomopathogen Neozygites tanajoae were recently introduced into Africa to improve the control achieved by predatory mites. In order to monitor the establishment of the Brazilian strains two PCR primer pairs, NEOSSU_F / NEOSSU_R and 8DDC_F / 8DDC_R were tested on N. tanajoae strains collected from several locations in Brazil and from three countries in Africa, Benin, Ghana and Tanzania. The first primer pair enabled the species-specific detection of N. tanajoae, while the second differentiated the Brazilian isolates from those of other geographical origin. The results confirmed that the two primer pairs tested are suitable for the detection of N. tanajoae and the differential identification of Brazilian and African strains. PCR can therefore be used to monitor the establishment and spread of the Brazilian strains in Benin and in other African countries where they have been introduced recently in order to improve cassava green mite (CGM) control. In this work the establishment and spread of Brazilian strains of N. tanajoae were followed in a countrywide survey in Benin in which a total of 141 cassava fields were inspected. Samples of M. tanajoa suspected of being infected by N. tanajoae were found in 60 fields distributed between the coastal Southern Forest Mosaic (SFM) and the Northern Guinea Savannah (NGS) zones. PCR analysis of DNA samples extracted from samples from these fields revealed that N. tanajoae is well distributed in Benin and that Brazilian strains were effectively established and have spread throughout the country. However, the highest rates of infection due to Brazilian strains were observed in the sub-humid and humid savannah zones of the country. Identification of N. tanajoae strains using molecular tools, however, is very costly. Hence, development of alternative techniques is desirable. Therefore, the difference in biocontrol performance and in host ranges was compared to discriminate between African and Brazilian strains of N. tanajoae. The results suggest that the biocontrol potential and the host ranges bioassays are suitable for evaluating the infectiveness of N. tanajoae on cassava green mite. However, those methods were not suitable for differentiating among different origins of strains of the entomopathogenic fungus. The establishment of N. tanajoae in Benin after its introduction for the control of cassava green mite resulted in co-occurrence with the predatory mite Typhlodromalus aripo in cassava fields. However, little is known on the interaction of the two antagonists and on the biological control potential of M. tanajoa. In a series of greenhouse experiments, effects of single and combined releases of N. tanajoae and T. aripo on their respective population dynamics and on the suppression of M. tanajoa populations were evaluated. In order to complement the greenhouse experiments, laboratory experiments were conducted to evaluate the feeding, oviposition and longevity of T. aripo fed with healthy or N. tanajoae-infected M. tanajoa. The results showed that simultaneous release of T. aripo and N. tanajoae in the same cassava field may be detrimental to the biological control of the cassava green mite. It is therefore preferable to release in each area only the antagonist species known to be well adapted to the prevailing environmental conditions. In conclusion, this thesis shows that molecular techniques are the most suitable methods to detect infection of CGM by N. tanajoae and to differentiate among strains. Molecular techniques are also useful for monitoring the establishment and dispersal of introduced N. tanajoae species in the field. Furthermore, this study increased our knowledge on the performance and host ranges of the African and Brazilian strains of N. tanajoae. It also improves our understanding of the interaction between N. tanajoae and the most effective predatory mite T. aripo as both biocontrol agents are sharing the same habitats. Future research should focus on in vitro production and cryopreservation of African strains of N. tanajoae in order to develop specific primers for detecting African isolates. Furthermore, studies of the genetic diversity of N. tanajoae populations in the cassava fields using molecular techniques could strongly improve our understanding of the interaction between exotic and native fungi in the cassava ecosystem. Further investigations are required on the interaction between the predatory mite T.aripo and the pathogen N. tanajoae at a larger spatial scale and under natural conditions, and on factors affecting the loss in biocontrol potential of exotic species of N. tanajoae when introduced in their new environment.

Handbook Of Biological Control

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Author : T. W. Fisher
language : en
Publisher: Elsevier
Release Date : 1999-09-20

Handbook Of Biological Control written by T. W. Fisher and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-09-20 with Science categories.

For many years the use of chemical agents such as pesticides and herbicides has been effective in controlling the many varieties of pests that infest both agricultural crops and backyard gardens. However, these pests are gradually becoming resistant to these agents, because the agents themselves are acting as selective factors making the pests better and better able to resist and persist. As a result, the use of biological controlling agents is increasing. This book is a comprehensive and authoritative handbook of biological control.

The Handbook Of Mites Of Economic Plants

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Author : Vincenzo Vacante
language : en
Publisher: CABI
Release Date : 2015-12-21

The Handbook Of Mites Of Economic Plants written by Vincenzo Vacante and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-12-21 with Science categories.

Mites pose a serious problem to plants worldwide, attacking crops and spreading disease. When mites damage crops of economic importance the impacts can be felt globally. Mites are among the most diverse and successful of invertebrates, with over 45,000 described species, with many more thousands to be discovered. They are responsible for a significant portion of the losses of crops for food, fibre, industry and other purposes, and require expensive and often controversial pest control measures. Understanding these mites is vital for entomologists, pest researchers, agronomists and food producers. Knowledge of mite pests helps to inform control strategies and optimize the production of economic plants and the agrarian economy. This encyclopedia provides a thorough coverage of the mites and the problems they cause to crops, yet it is easily searchable, organised by mite species and subdivided into helpful headings. It takes a worldwide view of the issue of mites injurious to economic plants, describing mites prevalent in different regions and discussing control methods appropriate in different environments. This book provides an encyclopaedic reference to the major mites, described by family in terms of their internal and external morphology, bio-ecology and family systematics. Methods of mite collection and laboratory study is described, as well as species diagnostic characteristics, worldwide distribution, host plants, identification by the type of damage they cause and control strategies, including chemical and biological intervention and integrated pest management measures. Mites of the following families are included: (Eriophyoidea, Tarsonemidae, Tuckerellidae, Tenuipalpidae, Tetranychidae, Acaridae, Penthaleidae). Mites of Economic Plants is an important resource for students of entomology and crop production, and as a thorough reference guide for researchers and field workers involved with mites, crop damage and food production.