Tuta absoluta in Tunisia: ten years of invasion and pest management

Mansour, Ramzi; Cherif, Asma; Attia-Barhoumi, Sabrine; Zappalà, Lucia; Grissa-Lebdi, Kaouthar

doi:10.1007/s12600-019-00748-9

Cited by 22 publications

(10 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For example, in Northern Africa, pheromone-based monitoring revealed activity of the pest all year round and at high population density. 48,49 Studies have also shown that Africa hosts diverse wild and cultivated Tuta absoluta host plants that are available all year round. 46,[50][51][52][53][54][55][56] These can facilitate Tuta absoluta host switching, impairing diapause and thus aiding survival through winter.…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, all‐year round activity has been reported in other African agro‐ecosystems. For example, in Northern Africa, pheromone‐based monitoring revealed activity of the pest all year round and at high population density 48,49 . Studies have also shown that Africa hosts diverse wild and cultivated Tuta absoluta host plants that are available all year round 46,50–56 .…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Cold hardiness of the South American tomato pinworm Tuta absoluta (Lepidoptera: Gelechiidae): both larvae and adults are chill‐susceptible

Tarusikirwa

Mutamiswa

Chidawanyika

et al. 2020

Pest Management Science

View full text Add to dashboard Cite

BACKGROUND: For many insects, including invasive species, overwintering survival is achieved behaviourally (e.g. through migration) or physiologically by entering diapause, a state of arrested physiological development that may be accompanied with depressed supercooling points (SCPs). Diapause allows in situ adaptation to adverse environmental conditions, providing sufficient parent propagules for insect pest proliferation when optimal conditions resurface. This phenomenon has however not been observed in the invasive South American tomato pinworm Tuta absoluta in its Mediterranean invaded areas. Moreover, no studies have looked at its overwintering survival in sub-Saharan Africa. Here, we thus investigated the cold hardiness of Tuta absoluta larvae and adults to better explain its local overwintering adaptation strategy. RESULTS: Larval lower lethal temperatures ranged from −1 to −17°C for 0.5 to 4 h durations. Adults showed lower temperature activity limits than larvae albeit freeze strategy experiments showed neither survived internal freezing. Fasting and dehydration pre-treatment generally depressed SCPs, although asymmetrically, conferring more negative SCPs for larvae. Ramping rates, synonymic to diurnal temperature changes also significantly affected SCPs while, inoculative freezing significantly compromised freezing temperatures in both larvae and adults. CONCLUSION: Our results suggest that (i) Tuta absoluta larvae and adults are chill-susceptible and may successfully overwinter, (ii) larvae appear more cold hardy than adults and (iii) ecological factors e.g. inoculative freezing, cooling rates, feeding-and hydration-status may affect cold hardiness. These results are important in determining species range limits, population phenology, modelling pest risk status and allows temporal life-stage specific targeting of management strategies.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Cold hardiness of the South American tomato pinworm Tuta absoluta (Lepidoptera: Gelechiidae): both larvae and adults are chill‐susceptible

Tarusikirwa

Mutamiswa

Chidawanyika

et al. 2020

Pest Management Science

View full text Add to dashboard Cite

show abstract

“…Definitive trap density guidelines have not been established and can vary by region and information source consulted (e.g., published literature, trap manufacturer). However, an initial reliable monitoring program can be achieved with 1 to 4 traps/ha (Mansour et al 2019). Based on the number of males caught per pheromone trap, the risk of infestation can be evaluated and should be considered low for less than 3 individuals/week, moderate if between 4 and 30 individuals/week and high for more than 30 individuals/ week (Monserrat Delgado 2008).…”

Section: Monitoringmentioning

confidence: 99%

“…While pheromone-based monitoring involves only a limited number of traps per hectare, mass trapping requires placing a higher number of traps in various strategic positions in the crop field to remove a high proportion of male insects from the pest population. For example, in Tunisia, the recommended density of Delta or water traps is 32 or 36 traps ha -1 for open-field mass trapping and 2 Delta or water traps for a 500 m 2 greenhouse (Mansour et al 2019). The doses of sex pheromone to be loaded on the diffuser are usually claimed to be similar to those used for monitoring efforts, even if some authors suggest adapting the pheromone dose to the level of infestation (Chermiti and Abbes 2012).…”

Section: Mass Trappingmentioning

confidence: 99%

Integrated pest management of Tuta absoluta: practical implementations across different world regions

et al. 2021

Self Cite

View full text Add to dashboard Cite

“…Damage by T. absoluta is caused by larvae which can feed on all the aerial structures of host plants (Desneux et al 2010). The species' polyphagy, short generation time, strong dispersal capacity, and ability to rapidly develop resistance to insecticides facilitate its invasion success in novel ranges (Biondi et al 2018;Han et al 2018;Guedes et al 2019;Guedes and Picanço 2012;Mansour et al 2019;Siqueira et al 2000), thus making management strategies less straightforward (Aigbedion-Atalor et al 2019).…”

Section: Introductionmentioning

confidence: 99%

First report and distribution of the South American tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) in Togo

Fiaboe

Agboka

Agboyi³

et al. 2020

Phytoparasitica

View full text Add to dashboard Cite

The South American tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) first invaded Africa in 2008. Since then, the pest has been causing considerable losses to tomatoes across the continent, thereby affecting food security and livelihood of millions of growers and consumers. In this paper, the agroecological-based occurrence of the alien invasive species was reported for the first time in Togo. Fifteen sites were surveyed countywide in the five regions of the country from November 2018 to February 2019. Male moths were trapped using pheromone-based delta traps, and the larvae were collected through sampling of infested tomato leaves and fruits. The field-collected and laboratory-emerged specimens were used for the morphological features and molecular analysis and sequence deposit into GenBank under the accession number MN759250. The pest was present in all regions and sites surveyed across different agro-ecological zones, with significant disparities between agroecologies in relation to population densities. The daily as well as the cumulative catches of T. absoluta male moths was higher in the Coastal Savannah zone than in other agro-ecological zones surveyed, with a daily mean value of 10.78 ± 0.99 individuals per trap. This study is the first report confirming the geo-occurrence of T. absoluta in Togo and represents a baseline for further studies.

show abstract

Tuta absoluta in Tunisia: ten years of invasion and pest management

Cited by 22 publications

References 65 publications

Cold hardiness of the South American tomato pinworm Tuta absoluta (Lepidoptera: Gelechiidae): both larvae and adults are chill‐susceptible

Cold hardiness of the South American tomato pinworm Tuta absoluta (Lepidoptera: Gelechiidae): both larvae and adults are chill‐susceptible

Integrated pest management of Tuta absoluta: practical implementations across different world regions

First report and distribution of the South American tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) in Togo

Contact Info

Product

Resources

About