Avaliação de aspectos fisiológicos de três genótipos de tomateiro infestados por Bemisia tabaci (Gennadius) biótipo B (Hemiptera: Aleyrodidae)

Toscano, Luciana Cláudia; Júnior, Arlindo Leal Boiça; Maruyama, Wilson Itamar

doi:10.1590/s1519-566x2004000600016

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…In relation to TIRp, Toscano et al (2004) stated that this is a physiological disorder caused by toxins introduced by SLW nymphs when feeding on leaves. Cuellar and Morales (2006) refer to this problem as the "rainbow" and they associate this behavior to the B. biotype of B. tabaci.…”

Section: Planting Datesmentioning

confidence: 99%

Tomato Irregular Ripening in the Culiacan Valley, Mexico

et al. 2018

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In Mexico, tomato (Solanum lycopersicum L.) is the most exported vegetable, and it is also of utmost importance in local markets; however, silverleaf whitefly (Bemisia argentifolii Bellows & Perring) attacks reduce production from 30 to 70 %. Although Mexican farmers use different technologies to grow tomato plants, irregular ripening is a generalized concern for adequate yield and product quality. Previous reports on tomato irregular ripening (TIR) associate it to the presence of silverleaf whitefly and low temperatures during harvest. Silverleaf whitefly incidence and temperature effects were measured to establish a relationship to TIR at one of the largest Mexican areas of tomato production. Experiments were carried out on 16 tomato hybrids sowed at the INIFAP Experiment Station in the Culiacan Valley, Mexico. Yield and commercial fruits size were measured, as they are important factors that determine commercialization and destination market (e.g. industrial process, export or domestic market). Silverleaf whitefly incidence and temperature effects on TIR were also analyzed on the basis of yield. TIR symptoms, both temporary (TIRt) and permanent (TIRp) were observed. The term TIRt described fruits that resumed their maturation process during the storage after harvest and reached full ripening after 7 d at 25 ºC. Consistent with previous reports, it was observed that TIRt symptoms were associated to low temperatures ( ≤ 8 ºC) during early harvest dates. TIRp damaged more fruits and associated to the effect of silverleaf whitefly at high population densities (0.77 to 0.93 adults cm-2), to high temperatures during the harvest season and to susceptible tomato genotypes.

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Section: Planting Datesmentioning

confidence: 99%

Tomato Irregular Ripening in the Culiacan Valley, Mexico

et al. 2018

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“…This pest has approximately 700 reported host plants, mainly from the families Asteraceae, Brassicaceae, Cucurbitaceae, Fabaceae, Malvaceae, and Solanaceae (Greathead 1986;Li et al 2011). It causes damage to crops due to sap sucking, injection of toxins into the vascular system, and transmission of viruses, especially geminiviruses (Blackmer & Byrne 1999;Toscano et al 2004;Varma et al 2011). Additionally, opportunistic fungi develop on the sweet excretions (honeydew) of B. tabaci, forming a dark layer of fungi that covers the plants (sooty mold) resulting in a reduction of photosynthesis and depreciation of the fruit value (Gusmão et al 2005;Stansly & Naranjo 2010).…”

mentioning

confidence: 99%

Sampling Plan for Bemisia tabaci (Hemiptera: Aleyrodidae) in Melon Crops

Macêdo

Sarmento

Pereira

et al. 2019

Florida Entomologist

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Toxicity of insecticides to the sweetpotato whitefly (Hemiptera: Aleyrodidae) and its natural enemies

Bacci

Crespo

Galvan

et al. 2007

Pest Management Science

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Efficient chemical control is achieved when insecticides are active against insect pests and safe to natural enemies. In this study, the toxicity of 17 insecticides to the sweetpotato whitefly, Bemisia tabaci (Gennadius), and the selectivity of seven insecticides to natural enemies of this insect pest were evaluated. To determine the insecticide toxicity, B. tabaci adults were exposed to abamectin, acephate, acetamiprid, cartap, imidacloprid, malathion, methamidophos, bifenthrin, cypermethrin, deltamethrin, esfenvalerate, fenitrothion, fenpropathrin, fenthion, phenthoate, permethrin and trichlorphon at 50 and 100% of the field rate (FR), and to water (untreated control). To determine the insecticide selectivity, adults of Encarsia sp., Acanthinus sp., Discodon sp. and Lasiochilus sp. were exposed to abamectin, acephate, acetamiprid, cartap, imidacloprid, malathion and methamidophos at 50 and 100% FR, and to water. Groups of each insect species were exposed to kale leaves preimmersed in each treatment under laboratory conditions. Mortality of exposed individuals was recorded 24 h after treatment. Cartap and imidacloprid at 50 and 100% FR and abamectin and acetamiprid at 100% FR showed insecticidal activity to B. tabaci adults. Abamectin at 50 and 100% FR was the least insecticidal compound to the natural enemies Acanthinus sp., Discodon sp. and Lasiochilus sp. The present results suggest that abamectin at 100% FR may decrease B. tabaci field populations but can still be harmless to predators. Implications of these results within an integrated pest management context are discussed.

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Avaliação de aspectos fisiológicos de três genótipos de tomateiro infestados por Bemisia tabaci (Gennadius) biótipo B (Hemiptera: Aleyrodidae)

Cited by 8 publications

References 10 publications

Tomato Irregular Ripening in the Culiacan Valley, Mexico

Tomato Irregular Ripening in the Culiacan Valley, Mexico

Sampling Plan for Bemisia tabaci (Hemiptera: Aleyrodidae) in Melon Crops

Toxicity of insecticides to the sweetpotato whitefly (Hemiptera: Aleyrodidae) and its natural enemies

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