Greenhouse and field screening of wildLycopersicon germplasm for resistance to the whiteflyBemisia argentifolii

Muigai, S. G. S.; Bassett, Mark J.; Schuster, David J.; Scott, John F.

doi:10.1007/bf02979764

Cited by 53 publications

(56 citation statements)

References 27 publications

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“…The high resistance of LA716 (S. pennellii) can be related to the presence of type IV glandular trichomes (Williams et al 1980) leading to a nonpreference for oviposition by the B. tabaci B biotype, as observed by others (Fancelli & Vendramim 2002, Toscano et al 2002, Fancelli et al 2003, Muigai et al 2003, Baldin et al 2005. These assumptions are supported by other studies in which the trichome exudates were removed, leading to an increase in the number of eggs of B. tabaci B biotype (Fancelli et al 2005).…”

Section: Resultsmentioning

confidence: 66%

“…However, a much higher number was observed for Santa Clara cultivar (19.2 mm 2 /trichomes) when compared to the 4.5 mm 2 / trichomes reported in here. This difference can be related to the infl uence of various factors, such as: photoperiod (Snyder et al 1998), age of the plant and level of fertilizers used (Leite et al 1999), position of the leaf in the dossel , or the area where the plant was cultivated (in greenhouses or in the fi eld) (Muigai et al 2003).…”

Section: Resultsmentioning

confidence: 99%

“…However, such allelochemical did not affect the development of whitefl y nymphs (Liedl et al 1995). Resistance in S. pennellii (LA716) has also been related to antixenosis for oviposition, mediated by acylsugars present in type IV glandular trichomes exudates (Barten et al 1994, Nombela et al 2000, Muigai et al 2003, Fancelli et al 2005.…”

Section: Resultsmentioning

confidence: 99%

“…Low or high density of one type of trichome is either correlated to the different access to the same species or to the infl uence of other factors such as: photoperiod (especially in type IV and type VI trichomes densities of S. habrochaites = L. hirsutum) (Snyder et al 1998), age of the plant and level of fertilizers used (Leite et al 1999), position of the leaf in the dossel , or area where the plant was cultivated (in greenhouses or in the fi eld) (Muigai et al 2003).…”

mentioning

confidence: 99%

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Influence of trichomes on attractiveness and ovipositional preference of Bemisia tabaci (Genn.) B biotype (Hemiptera: Aleyrodidae) on tomato genotypes

Oriani¹,

Vendramim²

2010

Neotrop. entomol.

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-Brazil is one of the world's largest tomato producer, but considerable part of the production is lost due to the attack of Bemisia tabaci (Genn.) B biotype. Resistant germoplasm plants can be an important method for B. tabaci control in integrated pest management approaches. The attractiveness and ovipositional preference of B. tabaci for 17 tomato genotypes were evaluated in a free-choice test. Trials were set up in a randomized block design with ten replicates. Each replicate (one tomato plant per pot) was placed in a cage (80 x 50 x 50 cm) and infested with 1,000 adults during four days. Linear correlation tests were applied between the number of insects and eggs and number of trichomes in each tomato genotype. LA716, LA444-1 and PI134418 genotypes were the least attractive, while the 'Santa Clara' was the most attractive; PI134417 trapped the largest number of adults. LA716 genotype (4.1 eggs/leafl et and 2.1 cm 2 /eggs per leafl et) was the least preferred for whitefl y oviposition; NAV1062, 'Fanny', LA1335, 'Santa Clara' and IAC294 were the most preferred genotypes. The glandular trichomes density was negatively correlated with whitefl y's attractiveness and oviposition per leafl et and per leaf, and positively with the number of trapped insects. The non-glandular trichomes density was negatively correlated with the number of trapped insects and positively with whitefl y's oviposition per cm 2 /leafl et and per cm 2 /leaf. LA716 had high antixenosis level (ovipositional nonpreference) toward B. tabaci B biotype related with type IV glandular trichome.

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Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Influence of trichomes on attractiveness and ovipositional preference of Bemisia tabaci (Genn.) B biotype (Hemiptera: Aleyrodidae) on tomato genotypes

Oriani¹,

Vendramim²

2010

Neotrop. entomol.

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“…No tomateiro, a resistência por antibiose e antixenose às moscas-brancas está relacionada principalmente com a densidade e o tipo de tricoma (Barten et al 1994, Toscano et al 2002, Muigai et al 2003, Fancelli et al 2005. Baldin et al (2005), ao avaliar os possíveis mecanismos de resistência de diferentes genótipos de tomateiro (Lycopersicon spp.)…”

Section: Influência Dos Tipos De Tricomas Foliaresunclassified

Comportamento de oviposição da mosca-branca Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae) biótipo B em tomateiro

Vendramim¹,

Souza²,

Ongarelli³

2009

Neotrop. entomol.

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-The objective of this work was to evaluate the infl uence of the leaf surface, the insect geotropic behavior and the type of foliar trichome on Bemisia tabaci (Genn.) biotype B oviposition on tomato leaves. Bemisia tabaci females were confi ned in acrylic boxes in which tomato leafl ets were fi xed at the bottom and top part of the boxes to allow insects to access the leaf surface to be tested (adaxial and/or abaxial) in both no-choice and free choice tests. Oviposition was always higher when the leaf was offered at the top of the box and preferably at the abaxial leaf surface. The effects of leaf trichomes (glandular and non glandular) on B. tabaci oviposition was evaluated by offering the abaxial surface of tomato leafl ets to females after a 70% ethanol wash to remove glandular exsudates against a control treatment (without a ethanol wash). Oviposition was concentrated mostly near to non glandular trichomes, showing whitefl y females can discriminate among the trichomes.KEY WORDS: Host selection, oviposition preference, glandular trichome, trichome exsudate RESUMO -Avaliou-se a infl uência da face foliar, do comportamento geotrópico do inseto e do tipo de tricoma foliar sobre a oviposição de Bemisia tabaci (Genn.) biótipo B em folhas de tomateiro. Para avaliação desses efeitos foram realizados vários ensaios nos quais as fêmeas foram confi nadas em caixas de acrílico. Folíolos de tomateiro foram fi xados no topo e na base das caixas, de tal forma a permitir o acesso dos insetos às faces adaxial e abaxial de maneira isolada e concomitante (com e sem chance de escolha). Os insetos sempre depositaram maior número de ovos quando a superfície foliar se encontrava no topo da caixa e, de maneira geral, preferiram depositar seus ovos na face abaxial dos folíolos. Para avaliar o efeito do tipo de tricoma (glandular e não-glandular) sobre a oviposição de B. tabaci, a face abaxial dos folíolos de tomateiro foi oferecida a cerca de 30 fêmeas para oviposição em cada caixa de acrílico. Foram oferecidos folíolos previamente lavados com etanol a 70% (de forma a eliminar os exsudatos glandulares) e sem lavagem prévia. A maior parte da oviposição ocorreu ao lado dos tricomas não-glandulares, demonstrando que o inseto discrimina o tipo de tricoma. PALAVRAS-CHAVE: Seleção hospedeira, preferência para oviposição, tricoma glandular, exsudato do tricoma A mosca-branca Bemisia tabaci (Genn.) biótipo B é atualmente uma das principais pragas do tomateiro, difícil de ser controlada devido ao seu hábito de permanecer na face abaxial das folhas (Villas Boas et al 1997). Os danos desse biótipo são mais intensos em função da sua maior agressividade, que resulta da maior fecundidade, ampla gama de hospedeiros, alta resistência aos inseticidas e capacidade de causar desordens fi siológicas nas plantas (Costa & Brown 1990, Prabhaker et al 1998.As fêmeas de B. tabaci depositam seus ovos preferencialmente na face abaxial das folhas mais novas (Simmons 1994(Simmons , 1999, talvez pelo fato de a face abaxial apresentar cutícula geralmen...

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Tomato

Díez

Nuez

2008

Vegetables II

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Greenhouse and field screening of wildLycopersicon germplasm for resistance to the whiteflyBemisia argentifolii

Cited by 53 publications

References 27 publications

Influence of trichomes on attractiveness and ovipositional preference of Bemisia tabaci (Genn.) B biotype (Hemiptera: Aleyrodidae) on tomato genotypes

Influence of trichomes on attractiveness and ovipositional preference of Bemisia tabaci (Genn.) B biotype (Hemiptera: Aleyrodidae) on tomato genotypes

Comportamento de oviposição da mosca-branca Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae) biótipo B em tomateiro

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