Reducing Tuber Damage by Potato Tuberworm (Lepidoptera: Gelechiidae) With Cultural Practices and Insecticides

Clough, George H.; Rondon, Silvia I.; DeBano, Sandra J.; David, N. L.; Hamm, P. B.

doi:10.1603/ec09065

Cited by 22 publications

(9 citation statements)

References 9 publications

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“…The infested tubers become completely unmarketable [2]. Different approaches were tried to prevent and control this pest [3]. One approach was using insecticides.…”

Section: Introductionmentioning

confidence: 99%

Fumigant toxicities of essential oils and two monoterpenes against potato tuber moth (Phthorimaea operculellaZeller)

2016

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SummaryIntroduction:The potato tuber moth (PTM) is the major economic pest of potato. Different approaches were tried to prevent and control this pest including natural pesticides and synthetic fumigants.Objectives: This study was conducted to evaluate the insecticidal activity of the essential oils of thyme and myrtle. In addition to evaluating the insecticidal activity of carvacrol and eucalyptol against the different life stages of potato tuber moth using a fumigation bioassays.Methods:Thyme and myrtle oils were extracted from wildThymus syriacusBoiss. and wildMyrtus communisL. by hydrodistillation. Fumigation experiments were conducted on potato tuber moth of different stages of development (eggs, larvae, pupae, and adults), using standard methods. The potato tuber moth was treated for different periods using different concentrations of the essential oils. One-way analysis of variance (ANOVA) was applied on the mortality percentages data to estimate the significance of differences between treatments atp<0.05. Probit analysis was used to estimate the LC50, LC90and LT50.Results:Adult stage was the most sensitive to essential oils vapours with LC50value of 0.5μl/l air. Whereas, pupal stages were the most tolerant. The essential oil of thyme possessed the strongest fumigant toxicity against eggs with a LC50value of 6.1μl/l air. The two monoterpens showed varied fumigant toxicity against adult stage. Carvacrol achieved 100% mortality at 0.125μl/l air after 6 h, and 0.025μl/l air after 48h exposure with LT50period of 0.5 h.Conclusion:The present work demonstrated thatT. syriacusessential oil is a promising natural fumigant against the different developmental stages of PTM.

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“…The infested tubers become completely unmarketable [2]. Different approaches were tried to prevent and control this pest [3]. One approach was using insecticides.…”

Section: Introductionmentioning

confidence: 99%

Fumigant toxicities of essential oils and two monoterpenes against potato tuber moth (Phthorimaea operculellaZeller)

2016

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“…The remaining generations, from three to five, develop when no potato crops are in the fields and they are supported by tubers not collected at harvest and by volunteer plants (Masetti et al , ). Several studies (Ali, ; Dogramaci et al , ; Clough et al , ; Rondon, ) highlighted the importance of reducing overwintering of PTW by removing residual tubers from the fields or by burying them immediately after harvesting with appropriate tillage practices. Given that highest population peaks were recorded after the harvesting and that PTW exploits only the potato, the prompt elimination of unharvested tubers and volunteer plants should be integrated as a key practice for the management of P. operculella in Northern Italy.…”

Section: Discussionmentioning

confidence: 99%

“…If potatoes are conserved in unrefrigerated storages allowing PTW to continue development, losses can be devastating (Radcliffe, ). Several studies focused on integrated pest management methods to control PTW by integrating cultural practices (Clough et al , ), chemical sprays (Saour, ), Bacillus thuringiensis Berliner ssp. kurstaki (Bt) (Arthurs et al , ), Phthorimaea operculella granulovirus (PoGV) (Sporleder et al , ) and natural enemies (Saour, ; Keasar & Steinberg, ).…”

Section: Introductionmentioning

confidence: 99%

Area-wide monitoring of potato tuberworm (Phthorimaea operculella) by pheromone trapping in Northern Italy: phenology, spatial distribution and relationships between catches and tuber damage

et al. 2014

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1 The potato tuberworm (PTW) Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) is key pest of potato in tropical and subtropical regions. From 2002 onward, PTW has emerged as a problem in the Bologna province, the main potato production area in Northern Italy. 2 Field investigations were performed to study the temporal and spatial dynamics of PTW. Adult moths were monitored using pheromone-baited traps over 3 years (2009)(2010)(2011). Traps were georeferenced and catches were analyzed by geostatistical maps. Each year, the percentage of damaged tubers at harvest was assessed. 3 Pheromone trapping, integrated with temperature-dependent developmental times, showed that PTW completed two generations throughout the potato-growing season; the remaining generations developed in the noncrop season. Maps showed a clumped distribution of PTW at the landscape scale. The hot spots of infestation corresponded to the areas most intensively cropped with potato. Trap catches from hilling to harvesting were linearly and positively correlated with the percentage of damage in 2 out of 3 years and in the pooled data set. 4 The present study demonstrated the widening of PTW areal to Northern Italy. In this area, georeferenced pheromone traps were validated as a useful monitoring technique for describing the phenology and distribution of PTW, thus providing crucial knowledge for the rational management of this pest.

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“…The most important damage is to tubers, also a food source for the larvae, especially exposed tubers, or those within centimeters of the soil surface. Larvae can infest tubers when foliage is vine killed or desiccated right before harvest (Clough et al, 2010). Tunnels left by tuber worms in tubers can be full of droppings or excrement that can be a potential source for secondary infections.…”

Section: Damagementioning

confidence: 99%

“…Females prefer to lay eggs on potato foliage, but when potato foliage starts to degrade and change color, or when it is vine-killed, the risk of tuber infestation increases greatly. The greatest risk for tuber infestation occurs between desiccation and harvest (Clough et al, 2010;Rondon, 2010). If tuberworm populations appear to be building prior to late season, additional control measures may be necessary.…”

Section: Controlmentioning

confidence: 99%

Pest Management Strategies for Potato Insect Pests in the Pacific Northwest of the United States

Rondon¹

2012

Insecticides - Pest Engineering

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Reducing Tuber Damage by Potato Tuberworm (Lepidoptera: Gelechiidae) With Cultural Practices and Insecticides

Cited by 22 publications

References 9 publications

Fumigant toxicities of essential oils and two monoterpenes against potato tuber moth (Phthorimaea operculellaZeller)

Fumigant toxicities of essential oils and two monoterpenes against potato tuber moth (Phthorimaea operculellaZeller)

Area-wide monitoring of potato tuberworm (Phthorimaea operculella) by pheromone trapping in Northern Italy: phenology, spatial distribution and relationships between catches and tuber damage

Pest Management Strategies for Potato Insect Pests in the Pacific Northwest of the United States

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