Improving Whitefly Management

Simmons, Alvin M.; Riley, David G.

doi:10.3390/insects12050470

Insects

2021

DOI: 10.3390/insects12050470

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Improving Whitefly Management

Alvin M. Simmons

David G. Riley

Abstract: Whiteflies (Hemiptera: Aleyrodidae), especially the sweetpotato or cotton whitefly, Bemisia tabaci (Gennadius), are among the most destructive and difficult to manage polyphagous insect pests around the globe [...]

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Cited by 2 publications

References 22 publications

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The beneficial effects of the tobacco hydroperoxide lyase pathway in whitefly host adaptation

Deng,

Li,

Liu

et al. 2023

Crop Health

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Plants respond to herbivore attack by emitting complex mixtures of volatile compounds to repel herbivores or attract predators and parasitoids. In this study, however, we revealed that tobacco green leaf volatiles (GLVs) were beneficial compounds for whitefly adaptation to host plants. Our study indicates that GLVs are closely associated with plant susceptibility to whiteflies. Whitefly infestation elevated the transcript of the hydroperoxide lyase (HPL) gene, one gene responsible for catalyzing the synthesis of C6 or C9 aldehydes from fatty acid hydroperoxides. Overexpression of HPL increased the emission of GLVs (hexanal, 1- hexanal, trans-2- hexanal and cis-3- hexanal) and resulted in improved performance for whiteflies. Exogenous application of GLVs promoted whitefly survival and fecundity and increased the plant's attraction to whiteflies. Thus, our study provides new insights into the role of the HPL pathway and GLVs in influencing herbivore adaptation to host plants.

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The beneficial effects of the tobacco hydroperoxide lyase pathway in whitefly host adaptation

Deng,

Li,

Liu

et al. 2023

Crop Health

View full text Add to dashboard Cite

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Assessment of Prickly Sida as a Potential Inoculum Source for Sida Golden Mosaic Virus in Commercial Snap Bean Farms in Georgia, United States

Codod,

Severns,

Sparks

et al. 2024

Plant Disease

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Sida golden mosaic virus (SiGMV), an obligate pathogen that infects snap beans (Phaseolus vulgaris), is known to infect prickly sida (Sida spinosa L.), which is a common weed in agricultural farms in Georgia. Prickly sida has also been reported as a suitable host of sweetpotato whitefly (Bemisia tabaci), the vector of SiGMV. Despite being a host for both SiGMV and its vector, the role of prickly sida as a reservoir and inoculum source for SiGMV in snap bean farms has not been evaluated. This study was conducted to document the occurrence of SiGMV-infected prickly sida plants and to assess its potential role as a source of SiGMV inoculum in snap bean farms. A survey of 17 commercial snap bean farms conducted in spring 2021 confirmed the presence of SiGMV-infected prickly sida in southern Georgia. In fall 2021 and 2022, on-farm field trials were conducted in four commercial farms where SiGMV-infected prickly sida plants were documented earlier as a part of survey in spring 2021. The spatial distribution and temporal patterns of adult whiteflies and SiGMV on snap bean were compared between macroplots (13.7 m x 30.5 m), ‘with prickly sida’ or ‘without prickly sida’, that were at least 232 m apart from each other. We did not observe any consistent differences in counts of adult whiteflies between macroplots with or without prickly sida in the four commercial farms. SiGMV infection was detected earlier and with higher incidences in snap bean macroplots ‘with prickly sida’ compared with macroplots ‘without prickly sida’. An apparent disease gradient was observed in two of the four farms assessed. Higher SiGMV incidences were observed on the edges of macroplots ‘with prickly sida’. These findings indicate prickly sida as a potential natural reservoir and a source for SiGMV spread in snap bean farms in southern Georgia.

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Improving Whitefly Management

Abstract: Whiteflies (Hemiptera: Aleyrodidae), especially the sweetpotato or cotton whitefly, Bemisia tabaci (Gennadius), are among the most destructive and difficult to manage polyphagous insect pests around the globe [...]

Cited by 2 publications

References 22 publications

The beneficial effects of the tobacco hydroperoxide lyase pathway in whitefly host adaptation

The beneficial effects of the tobacco hydroperoxide lyase pathway in whitefly host adaptation

Assessment of Prickly Sida as a Potential Inoculum Source for Sida Golden Mosaic Virus in Commercial Snap Bean Farms in Georgia, United States

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