Integrated control of potato tubermoth Phthorimaea operculella (Zeller) in Tunisia

Arx, R. von; Goueder, J.; Cheikh, M.; Temime, A. Ben

doi:10.1017/s1742758400023298

Cited by 15 publications

(19 citation statements)

References 7 publications

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“…PTM cross-infestation from field to storage and vice versa contributes to its severity. Due to the biological potential and destructive power of P. operculella, yield losses in non-refrigerated precarious storage facilities can reach 100% when the control of PTM is neglected (von Arx et al 1987;.…”

Section: Introductionmentioning

confidence: 99%

Potential of a granulovirus isolate to control Phthorimaea operculella (Lepidoptera: Gelechiidae)

Mascarin¹,

Alves²,

Rampelotti-Ferreira³

et al. 2010

BioControl

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In this study a Brazilian granulovirus strain, PhopGV, isolated from the potato tuber moth (PTM) Phthorimaea operculella, was investigated regarding its potential for biological control and in vivo production. The relationship between mortality of P. operculella larvae and virus concentration was determined at different temperatures on potato tubers and susceptibility of P. operculella to PhopGV was also determined on potato leaves. Virulence of PhopGV to P. operculella was not affected by temperatures from 18 to 30°C. The median lethal concentration (LC 50 ) of larvae fed on potato foliage treated with PhopGV was not higher than that verified with larvae fed on treated tubers. Optimal conditions for production of virus-infected larvae were obtained by using the virus suspensions of 41 9 10 5 , 6.3 9 10 5 and 62 9 10 5 OBs ml -1 at 18, 24 and 30°C, which resulted in 32.0, 31.4 and 34.8% of infected larvae collected, respectively. The maximum percentage of infected larvae recovered from tubers was not affected by temperature. However, time for production of virusinfected larvae was longer at 18°C and shorter at 30°C. Persistence of PhopGV was determined on stored tubers and we observed that the virus remained effective for at least two months, causing up to 84.2% mortality of P. operculella at 1 9 10 7 OBs ml -1 . The pathogen was also highly virulent to tomato pinworm, Tuta absoluta, inflicting high percentage of mortality, delaying larval growth and inhibiting pupation. This Brazilian PhopGV strain has potential to control PTM larvae on potato tubers at a broad range of temperature and can be produced in vivo using virus-treated tubers.

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Section: Introductionmentioning

confidence: 99%

Potential of a granulovirus isolate to control Phthorimaea operculella (Lepidoptera: Gelechiidae)

Mascarin¹,

Alves²,

Rampelotti-Ferreira³

et al. 2010

BioControl

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“…Chemical Control Studies suggest that insecticides that are effective against foliar infestation by P. operculella may not prevent tuber infestation (Bacon 1960a, b;Bacon et al 1971;Foot 1974aFoot , 1976cFoot , 1979Hoffmaster 1959). In the early 80's in Tunisia, foliar insecticide applications with deltamethrin prior to harvest did not reduce tuberworm infestation (von Arx et al 1987b). In Israel, good control was achieved using Insect Growth Regulators (IGRs) in comparison to metamidophos applied at the lower part of the canopy (Berlinger 1992).…”

Section: Controlling the Potato Tuberwormmentioning

confidence: 99%

“…These include the elimination of cull piles and volunteers, timing of vinekill, soil moisture at and after vine-kill, time between desiccation and harvest, rolling hills and covering hills, and cultivar selection (Rondon et al 2007). In Tunisia, practices like deep seeding, hilling up, early harvest, irrigation until harvest, good sorting of tubers at harvest and rapid harvesting prevent tuber infestation (von Arx et al 1987a;BenSalah and Aalbu 1992). Several biological and ecological studies support the effectiveness of one or more of these cultural practices.…”

Section: Controlling the Potato Tuberwormmentioning

confidence: 99%

“…According to Foot (1979), larval survival is inversely related to soil moisture and tuber depth. It also has been shown that exposed tubers are more prone to tuberworm infestation (von Arx et al 1987a). Foot (1979) indicated that tuber infestation occurred 2-4 weeks before harvest and all infested tubers were covered with no more than 3 cm of soil.…”

Section: Controlling the Potato Tuberwormmentioning

confidence: 99%

“…Repeated pre-harvest applications are required because Bt is degraded by ultraviolet light and rain (Awate and Naik 1979;Broza and Sneh 1994;Salama et al 1995b). Also, post-harvest applications in non-refrigerated stored potatoes may be needed (von Arx et al 1987a;Salama et al 1995a;Kroschel and Koch 1996;Farrag 1998). …”

Section: Parasitoids and Predatorsmentioning

confidence: 99%

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The Potato Tuberworm: A Literature Review of Its Biology, Ecology, and Control

2010

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The potato tuberworm, Phthorimaea operculella (Zeller), is a worldwide pest of solanaceous crops especially devastating to potatoes. Adults mate and lay eggs in foliage or tubers throughout the growing season, preferring foliage over tubers. When foliage has naturally or artificially senesced and/or tubers are accessible, they deposit eggs in or near the eye buds. The larvae mine leaves, stems, and petioles causing irregular galleries, and excavate tunnels through tubers. Foliar damage to the potato crop usually does not result in significant yield losses but infested tubers may have reduced marketability and losses in storage may be up to 100% especially in non-refrigerated systems. The greatest risk of tuber damage occurs immediately before harvest while the crop is left in the field prior to digging; additional damage may occur in storage, if conditions are not maintained properly. Potatoes that are left in the field for any length of time can become infested. The pest is difficult to control and growers rely extensively on the use of insecticides and a variety of cultural practices. After harvest, the insect may continue to develop on tubers or volunteer plants remaining in the field as well as on other solanaceous plants. Incorporation of host plant resistance together with insecticides and appropriate biological and cultural practices may provide the best management options. This review addresses P. operculella bionomics, including origins, distribution, host range, life cycle and life stage behavior; seasonal dynamics; abiotic factors; cultural, biological, and chemical control methods; and host plant resistance.Resumen La palomilla de la papa Phthorimaea operculella (Zeller) es una plaga importante de cultivos de solanáceas en todo el mundo pero especialmente devastadora para la papa. Los adultos se aparean y ponen huevecillos en follaje o en tubérculo a lo largo del ciclo de cultivo, con preferencia de follaje sobre los tubérculos. Cuando el follaje senesce natural o artificialmente y/o los tubérculos están accesibles, las polillas depositan sus huevos en o cerca de los ojos de las yemas. Las larvas hacen minas en las hojas, los tallos y en peciolos causando galerías irregulares, y excavan túneles en los tubérculos. El daño al follaje del cultivo usualmente no resulta en pérdidas significativas de rendimiento, pero los tubérculos infestados pueden tener una reducción en el mercado y las pérdidas en el almacén pueden llegar hasta el 100% especialmente en sistemas no refrigerados. El mayor riesgo de daño en los tubérculos se presenta inmediatamente antes de la cosecha mientras el cultivo está en el campo antes de ser cosechado y transportado. Se puede presentar daño adicional en el almacén si las condiciones no se mantienen apropiadamente. Las papas que se quedan en el campo por tiempo prolongado pueden ser infestados. La plaga es difícil de controlar y los productores confían extensivamente en el uso de insecticidas y en una variedad de prácticas culturales. Después de la cosecha, el insecto pue...

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Field-Based Thermal Need Research for Better Management of Phthorimaea operculella (Lepidoptera: Gelechiidae) and Its Damage on Five Potato Varieties

Zamani,

Golizadeh,

Fathi

et al. 2023

Potato Res.

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Integrated control of potato tubermoth Phthorimaea operculella (Zeller) in Tunisia

Cited by 15 publications

References 7 publications

Potential of a granulovirus isolate to control Phthorimaea operculella (Lepidoptera: Gelechiidae)

Potential of a granulovirus isolate to control Phthorimaea operculella (Lepidoptera: Gelechiidae)

The Potato Tuberworm: A Literature Review of Its Biology, Ecology, and Control

Field-Based Thermal Need Research for Better Management of Phthorimaea operculella (Lepidoptera: Gelechiidae) and Its Damage on Five Potato Varieties

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