Seasonal dynamics and management of whitefly ( Bemesia tabaci Genn.) in tomato ( Solanum esculentum Mill.)

Sharma, Devinder; Maqbool, Asifa; Jamwal, Vishav Vir Singh; Srivastava, K. N.; Sharma, Ashutosh

doi:10.1590/1678-4324-2017160456

Cited by 12 publications

(11 citation statements)

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“…Silva et al (2014) verificaram que em feijoeiro precipitação e temperatura pode afetar ocorrência de adultos e ninfas e umidade relativa afeta a presença de ovos. Na cultura do tomate foi observado correlação negativa entre precipitação e umidade relativa sobre mosca branca com 89% da variação na ocorrência (SHARMA et al, 2017).…”

Section: Resultsunclassified

“…Observou-se também com análise de regressão múltipla um coeficiente de regressão positivo entre adultos e ovos (p = 0,0004; R 2 0,8126) que explica 81,26% da ocorrência dos ovos nesse estudo. Sharma et al (2017) relatam que elevadas temperaturas podem conduzir para um aumento da atividade e consequentemente acelerar a multiplicação de mosca branca. Esta informação faz-se relevante para manejo integrado de mosca branca, com os cuidados no monitoramento de adultos e incidência de ovos principalmente quando se tem elevação de temperatura, auxiliando na melhor tomada de decisão evitando infestações.…”

Section: Resultsunclassified

“…Associados a isso, entender a influência de fatores abióticos na dinâmica populacional da praga é importante visando monitoramento e prevenção se surtos, auxiliando na tomada de decisão. Picos populacionais de B. tabaci ocorrem devido ao aumento da taxa de desenvolvimento, que está correlacionado com fatores meteorológicos, com temperaturas altas eleva-se a atividade e multiplicação de B. tabaci (SHARMA et al, 2017). Neste sentido, este estudo teve como objetivo avaliar a infestação de mosca branca biótipo B em cultivares de soja no polo de grãos de Paragominas, Pará, durante a safra 2017/18 e verificar a influência de fatores meteorológicos sobre as infestações.…”

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Infestação de mosca branca (Hemiptera: Aleyrodidae) biótipo B em cultivares de soja no polo Paragominas grãos, Pará

Souza¹,

Lima²,

Martins³

et al. 2021

Rev Agr Acad

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The aim of this study was to evaluate the infestation of whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) biotype B in 19 soybean cultivars in the Paragominas grain pole, 2017/18 crop year. The cultivars selected for planting are based on those normally planted in the Paragominas grain complex and research institutions. The sampling of the incidence of B. tabaci biotype B started on the 7th day after plant emergence (DAE), and the number of eggs, nymphs and adults was recorded weekly, that is, 10 small leaves of the plant evaluated in each plot, until the end of the crop cycle. The number of eggs and nymphs of B. tabaci type B was recorded in the laboratory with the aid of a stereoscopic microscope and adults made in loco. The values obtained were transformed into (x + 0.5)1/2, for normalization of these and submitted to analysis of variance (ANOVA) by the F test (Fisher). Tukey at 5% probability. The cultivar M 8644 IPRO showed the lowest infestation of eggs of B. tabaci and RK 6813RR was the most infested; for nymphs, the highest infestation was observed in cultivar RK 6813RR while in BRS 9383 IPRO there was less infestation; the highest number of whitefly adults was observed in the cultivar P 99R03, and M 8808 had the lowest average of adult insects and the period of highest incidence of whitefly was in the egg stage, in the first seven days after emergence (DAE); the period of 7 DAE was the most infested by adults and whitefly eggs; 35 and 42 DAE more infested by pest nymphs; meteorological factors mean temperature, rainfall and relative humidity do not showed influence on whitefly infestation, and relative humidity explained only 35.59% for incidence of eggs in soybean and the occurrence of adults explained 81% for the same parameter (eggs).

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Section: Resultsunclassified

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Infestação de mosca branca (Hemiptera: Aleyrodidae) biótipo B em cultivares de soja no polo Paragominas grãos, Pará

Souza¹,

Lima²,

Martins³

et al. 2021

Rev Agr Acad

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“…While the final means of control efficiency stayed much below the level considered ideal (≥ 80.0%), as shown on Figure 1, the vanishing of whitefly adults on certain evaluations of Experiment II and the overall lack of control in Experiment I resulted in an overeduction of the average means, which do not represent the subtleties of behavior in the different treatments; thus, a much better understanding is obtained by focusing on each individual evaluation. Although tomato plants are not grown in open field in the region, the natural occurrence of infestation inside the greenhouses points to a link with field populations in other crops; consequently, the drastic reduction in the population of whitefly adults (including the untreated control) at the last evaluations in Experiment II (see Table 3) might be associated with unfavorable climatic conditions during this period such as higher relative air humidity and lower mean temperatures (see Supplementary Table 1), which are detrimental to whitefly population and its spread (Sharma et al, 2013;Sharma, Maqbool, Jamwal, Srivastava, & Sharma, 2017). Nonetheless, the combined analysis of control efficiency means (Table 4) shows that the two experiments agreed on their main outcomes, despite being carried out under different infestation conditions.…”

Section: Combined Analysismentioning

confidence: 99%

Integrated Management of Tomato Whitefly Under Greenhouse Conditions

Arnemann¹,

Bevilaqua²,

Bernardi³

et al. 2019

JAS

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The whitefly Bemisia tabaci (Gennadius, 1889) is a major pest species in many agricultural crops worldwide. Growers from the Vale do Caí region, in Southern Brazil (Rio Grande do Sul state) have been facing severe economic losses due to the increasing damages caused by this sucking insect in their horticultural crops. Small-scale farming in the Vale do Caí region relies heavily on horticulture, with many families involved in the activity and a consumer market spread throughout the whole state. Virus transmission and other damages inflicted by B. tabaci are especially harmful to tomato plants, and the managing of the pest currently demands two thirds of all chemical insecticides used in the region. While chemical control remains the main strategy for whitefly management on tomato crops, control failures and lack of updated information have led tomato growers to raise the number of sprays per crop cycle, with selection of resistant populations and harmful effects on the environment as consequent risks. The aim of this work was to evaluate chemical compounds and bioinsecticides in the control of B. tabaci nymphs and adults on tomato plants grown in two different greenhouses and under natural infestation conditions. The most efficient treatment for the control of B. tabaci adults was cyantraniliprole + lambda-cyhalothrin (50+30 g a.i. ha-1) with 64% of average control efficiency. As for nymph control, the most efficient treatment was the Embrapa formula, a bioinsecticide composed of 0.5% flaxseed oil + 0.5% neutral detergent + 0.3% sodium bicarbonate, which resulted in 72% of whitefly control in average.

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“…[ 16 ] and brinjal ( Solanum melongena L.) [ 17 ] in India. Conversely, a positive effect of temperature and a negative effect of RH was also observed on B. tabaci population size on tomato in India [ 18 ]. In Venezuela, rainfall was reported to negatively affect B. tabaci population size on tomato [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Cassava Morphological Traits and Environmental Conditions on Field Populations of Bemisia tabaci

Katono

Omongo

Odong

et al. 2021

Insects

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High populations of species in the whitefly complex Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae) were reported to cause severe damage to cassava in East and Central Africa. However, reasons for B. tabaci population increases are not well understood. We investigated the effect of cassava morphological traits, temperature, rainfall and relative humidity (RH) on the abundance of B. tabaci. Five cassava genotypes with varying levels of resistance to cassava mosaic disease, cassava brown streak disease, and B. tabaci infestation were planted in three Ugandan agro-ecological zones. The experiment was conducted in 2016 and 2017 in a randomized complete block design. Across all locations, the tallest genotype Alado alado supported the lowest number of B. tabaci adults. In areas with high B. tabaci prevalence, leaf area, leaf lobe width, and leaf lobe number exhibited significant positive effects (p < 0.001) on B. tabaci adult count. Positive effects of relative humidity and negative effects of temperature and rainfall on B. tabaci adult and nymph counts were observed in 2016 and 2017, resulting in low populations in Lira. Evidently, temperatures of 28–30 °C, rainfall of 30–150 mm and RH of 55–70%, and deployment of cassava genotypes of low plant height, large leaf area, and lobe width significantly enhanced B. tabaci population growth.

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Seasonal dynamics and management of whitefly ( Bemesia tabaci Genn.) in tomato ( Solanum esculentum Mill.)

Abstract: Studies on seasonal dynamics of white fly (Bemesia tabaci) on tomato (Solanum esculentum var. Pusa Ruby) revealed that it appeared first during the

Cited by 12 publications

References 11 publications

Infestação de mosca branca (Hemiptera: Aleyrodidae) biótipo B em cultivares de soja no polo Paragominas grãos, Pará

Infestação de mosca branca (Hemiptera: Aleyrodidae) biótipo B em cultivares de soja no polo Paragominas grãos, Pará

Integrated Management of Tomato Whitefly Under Greenhouse Conditions

Influence of Cassava Morphological Traits and Environmental Conditions on Field Populations of Bemisia tabaci

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