Resistance Mechanisms in Sweetpotato Whitefly (Homoptera: Aleyrodidae) Populations from Sudan, Turkey, Guatemala, and Nicaragua

Dittrich, V.; Ernst, G.H.; Ruesch, Othmar; Uk, Solang

doi:10.1093/jee/83.5.1665

Cited by 117 publications

(87 citation statements)

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“…Prabhaker et al (1985) mencionaram, entretanto, que características biológicas e comportamentais de B. tabaci como rápido desenvolvimento, alta fecundidade e grande capacidade de dispersão são fatores que aumentam a probabilidade de aparecimento de resistência aos inseticidas comerciais de diferentes grupos químicos (Prabhaker et al 1989, Dittrich et al 1990. Em razão desse e de outros problemas causados pelos inseticidas no agroecossistema, métodos alternativos de controle de moscas brancas vêm sendo estudados.…”

Section: Palavras-chaveunclassified

Resistência de genótipos de soja a Bemisia tabaci (Genn.) biótipo B (Hemiptera: Aleyrodidae)

Lourenção¹

2002

Neotrop. Entomol.

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-Twenty soybean genotypes were evaluated in relation to silverleaf whitefly [Bemisia tabaci (Genn.) biotype B] resistance, in a free-choice test, under greenhouse conditions. The experiment was carried out with artificially infested soybean plants and evaluated during vegetative and reproductive stages. Line D 75-10169 and cultivars IAC 17 and IAC 19 presented nonpreference for oviposition, weak colonization and low adult attractiveness. Trichome density at abaxial trifoliolate surface was also measured in twenty soybean genotypes, at three plant positions (upper, middle and lower canopies), at the same development stages of the free-choice test. The line D 75-10169 presented the lowest trichome density while the cultivar 'IAC Holambra Stwart' showed the highest one. Significant correlations were detected between adult attractiveness and oviposition preference and between adult attractiveness and colonization level. To confirm the oviposition preference results, a no-choice test was carried out, also in greenhouse conditions, and the performance of five soybean genotypes (one highly susceptible and four with the smallest levels of oviposition) was checked. The line PI 227687, though showing multiple resistance to insects, was highly oviposited by silverleaf whitefly, while 'IAC 19', 'IAC 17', 'Coodetec 201' and line D 75-10169 showed oviposition nonpreference as the mecanism of resistance. The results strongly suggest that the resistance observed in those genotypes is stable.KEY WORDS: Glicyne max, host plant resistance, oviposition preference, silverleaf whitefly.RESUMO -O comportamento de 20 genótipos de soja foi avaliado em relação à preferência para oviposição, atratividade para adultos e colonização das plantas pela mosca branca Bemisia tabaci (Genn.) biótipo B, em teste de livre escolha, em casa de vegetação. O experimento foi conduzido com plantas de soja nas fases vegetativa e reprodutiva, infestadas artificialmente com esse inseto. As cultivares IAC 17, IAC 19 e a linhagem D 75-10169 apresentaram resistência do tipo não preferência para oviposição, baixos níveis de colonização e atratividade para adultos em relação a B. tabaci biótipo B. Também em casa de vegetação, foi avaliada a densidade de tricomas na superfície abaxial de folíolos dos 20 genótipos de soja, nos estratos superior, médio e inferior das plantas, nas fases de desenvolvimento em que as plantas foram avaliadas no teste de livre escolha. A linhagem D 75-10169 apresentou baixa densidade de tricomas, enquanto a cultivar IAC Holambra Stwart mostrou-se altamente pubescente. Foram verificadas correlações entre atratividade para adultos e preferência para oviposição e entre atratividade para adultos e colonização das plantas. Para confirmação dos resultados de preferência para oviposição, foi realizado teste sem chance de escolha, em casa de vegetação, no qual foi avaliado o comportamento de cinco genótipos (um altamente suscetível e os quatro menos preferidos para oviposição no teste com chance de escolha). A linhagem PI 227687, embo...

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Section: Palavras-chaveunclassified

Resistência de genótipos de soja a Bemisia tabaci (Genn.) biótipo B (Hemiptera: Aleyrodidae)

Lourenção¹

2002

Neotrop. Entomol.

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“…The mechanism of OP -and CB -resistance in B. tabaci from different regions of the world has been found to be insensitive AChE (Dittrich et al 1985(Dittrich et al , 1990Byrne & Devonshire 1993, 1997Byrne et al 1994;Anthony et al 1998;Byrne & Toscano 2002;Byrne et al 2003;Erdogan et al 2008). We have provided a quick and accurate method of determination of specific activity of the AChE of B. tabaci, which is a direct indication of the level of resistance to OPs and CBs.…”

Section: Discussionmentioning

confidence: 97%

Evaluation of Peracid Activated Organophosphates in Studies of Insecticide Resistance Conferred by Insensitive Acetylcholinesterases

Byrne¹,

Toscano²

2002

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“…Insecticide use in many cases resulted in the development of resistance and a general failure of control efforts. In the Sudan, Dittrich et al (1990) attributed part of the problem to the ability of insecticide-resistant B. tabaci individuals to increase their oviposition rates when under insecticidal stress (hormoligosis). In contrast, Eveleens (1983) considered suppression of aphelenid parasitoids with broad-spectrum insecticides as a major cause of the B. tabaci outbreaks.…”

Section: Economic Impactmentioning

confidence: 99%

History, current status, and collaborative research projects for Bemisia tabaci

2001

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Bemisia tabaci was described over 100 years ago and has since become one of the most important pests worldwide in subtropical and tropical agriculture as well as in greenhouse production systems. It adapts easily to new host plants and geographical regions and has now been reported from all global continents except Antarctica. In the last decade, international transport of plant material and people have contributed to geographical spread. B. tabaci has been recorded from more than 600 plant species and there may be many additional hosts not yet formally documented. Biotypes have been identified in different areas of the world suggesting that B. tabaci may be a species-complex undergoing evolutionary change. These biotypes may exhibit differences in viruses transmitted and transmission efficiency, rates of development, endosymbionts, host utilization, and physiological host damage. Excessive B. tabaci induced losses worldwide occur in field, vegetable and ornamental crop production. Losses occur from plant diseases caused by B. tabaci transmitted viruses, direct feeding damage, plant physiological disorders, and honeydew contamination and associated fungal growth. The number of B. tabaci-transmitted plant viruses has increased, and total yield losses of important food and industrial crops has occurred. Effective control at present is dependent on insecticides. However, this has been achieved with more selective chemistries, use of action thresholds, and resistance management. Host plant resistance and various cultural methods are also components of developing integrated management systems. National and international collaborative projects have made significant progress towards improved characterization of the whitefly problem, increased research, development of management methods, transfer of technology to the agricultural communities, and information exchange. These projects, as well as intensive education, research and extension activities form the basis for biologically and ecologically based approaches to management. Published by Elsevier Science Ltd.

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Resistance Mechanisms in Sweetpotato Whitefly (Homoptera: Aleyrodidae) Populations from Sudan, Turkey, Guatemala, and Nicaragua

Cited by 117 publications

References 0 publications

Resistência de genótipos de soja a Bemisia tabaci (Genn.) biótipo B (Hemiptera: Aleyrodidae)

Resistência de genótipos de soja a Bemisia tabaci (Genn.) biótipo B (Hemiptera: Aleyrodidae)

Evaluation of Peracid Activated Organophosphates in Studies of Insecticide Resistance Conferred by Insensitive Acetylcholinesterases

History, current status, and collaborative research projects for Bemisia tabaci

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