scholarly journals Development of Sterile Insect Technique for Control of the European Grapevine Moth, Lobesia botrana, in Urban Areas of Chile

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 378
Author(s):  
Gregory. S. Simmons ◽  
Melissa Cristal Salazar Sepulveda ◽  
Edith Alejandra Fuentes Barrios ◽  
Marcela Idalsoaga Villegas ◽  
Raul Enrique Medina Jimenez ◽  
...  
Keyword(s):  
Urban Areas ◽  
Field Studies ◽  
Mass Rearing ◽  
Fruit Production ◽  
Lobesia Botrana ◽  
Effective Control ◽  
Moth Population ◽  
European Grapevine Moth ◽  
Grapevine Moth ◽  
Production Areas

The European grapevine moth, a Palearctic pest, was first detected in the Americas in 2008. Its establishment in Chile presented production and export issues for grapes and other fruits, and a national control campaign was launched. Urban areas next to agricultural production areas were recognized as a challenge for effective control. In 2015, a SIT laboratory was established in Arica, Chile to evaluate its potential for urban control. Progress included the development and evaluation of artificial diets, a mass-rearing of 75,000 moths/week, confirmation of 150 Gy as an operational dose for inherited sterility, and releases of sterile moths in a 25 ha urban area next to fruit production areas. Season-long releases demonstrated that high overflooding ratios were achieved early in the season but decreased with a large increase in the wild moth population. Sterile moth quality was consistently high, and moths were observed living in the field up to 10 days and dispersing up to 800 m. Recommendations for further development of the SIT include conducting cage and field studies to evaluate overflooding ratios and mating competitiveness, measuring of infestation densities in release and no-release areas, and conducting trials to evaluate combining SIT with compatible integrated pest management (IPM) tactics such as fruit stripping and use of mating disruption.

scholarly journals Potential biological control of the pupal stage of the European grapevine moth Lobesia botrana by the entomopathogenic fungus Beauveria pseudobassiana in the winter season in Chile

2019 ◽  
Author(s):  
Fabiola Altimira ◽  
Nathalia De La Barra ◽  
Patricia Rebufel ◽  
Sylvana Soto ◽  
Rodrigo Soto ◽  
...  
Keyword(s):  
Entomopathogenic Fungus ◽  
Urban Areas ◽  
Winter Season ◽  
Pupal Stage ◽  
Lobesia Botrana ◽  
Vitis Vinifera L ◽  
European Grapevine Moth ◽  
Biocontrol Activity ◽  
Grapevine Moth ◽  
Chemical Pesticides

Abstract Objective: Lobesia botrana, the European grapevine moth, affects Vitis vinifera L. and other species of economic importance in a number of countries through damage caused by its larvae in berries and associated secondary diseases such as Botrytis cinerea . Control of the moth in urban areas is difficult due to poor chemical management of infested plants in houses. Additionally, in winter, L. botrana is in its pupal stage covered with a cocoon that prevents the penetration of chemical pesticides. For this reason, the objective of this work was to control the pupal stage with a formulation based on the entomopathogenic fungus Beauveria pseudobassiana in urban areas. Results: The strain RGM 1747 was identified as B. pseudobassiana by multilocus sequence analysis . The biocontrol activity of this formulated fungus against the infestation of vines with breeding pupae without cocoons showed 100% infection 21 days after inoculation under winter conditions. Finally, the biocontrol activity of the formulated fungus against natural infestations of L. botrana in winter in urban areas reached an efficacy of 51%. This result suggests that the B. pseudobassiana formulation is able to penetrate the cocoon and contributes to the integrated pest management of L. botrana .

scholarly journals Potential biological control of the pupal stage of the European grapevine moth by the entomopathogenic fungus Beauveria pseudobassiana in the winter season in Chile

2019 ◽  
Author(s):  
Fabiola Altimira ◽  
Nathalia De La Barra ◽  
Patricia Rebufel ◽  
Sylvana Soto ◽  
Rodrigo Soto ◽  
...  
Keyword(s):  
Entomopathogenic Fungus ◽  
Urban Areas ◽  
Winter Season ◽  
Pupal Stage ◽  
Lobesia Botrana ◽  
Vitis Vinifera L ◽  
European Grapevine Moth ◽  
Biocontrol Activity ◽  
Grapevine Moth ◽  
Chemical Pesticides

Abstract Objective: Lobesia botrana, the European grapevine moth, affects Vitis vinifera L. and other species of economic importance in a number of countries through damage caused by its larvae in berries and associated secondary diseases such as Botrytis cinerea. Control of the moth in urban areas is difficult due to poor chemical management of infested plants in houses. Additionally, in winter, L. botrana is in its pupal stage covered with a cocoon that prevents the penetration of chemical pesticides. For this reason, the objective of this work was to control the pupal stage with a formulation based on the entomopathogenic fungus Beauveria pseudobassiana in urban areas. Results: The present study of the biocontrol activity of the formulated fungus against the infestation of vines with breeding pupae without cocoons showed 100% infection 21 days after inoculation under winter conditions. Finally, the biocontrol activity of the formulated fungus against natural infestations of L. botrana in winter in urban areas reached an efficacy of 51%. This result suggests that the B. pseudobassiana formulation is able to penetrate the cocoon and contributes to the integrated pest management of L. botrana.

scholarly journals Potential biological control of the pupal stage of the European grapevine moth Lobesia botrana by the entomopathogenic fungus Beauveria pseudobassiana in the winter season in Chile

2019 ◽  
Author(s):  
Fabiola Altimira ◽  
Nathalia De La Barra ◽  
Patricia Rebufel ◽  
Sylvana Soto ◽  
Rodrigo Soto ◽  
...  
Keyword(s):  
Entomopathogenic Fungus ◽  
Urban Areas ◽  
Winter Season ◽  
Pupal Stage ◽  
Lobesia Botrana ◽  
Vitis Vinifera L ◽  
European Grapevine Moth ◽  
Biocontrol Activity ◽  
Grapevine Moth ◽  
Chemical Pesticides

Abstract Objective: Lobesia botrana, the European grapevine moth, affects Vitis vinifera L. and other species of economic importance in a number of countries through damage caused by its larvae in berries and associated secondary diseases such as Botrytis cinerea . Control of the moth in urban areas is difficult due to poor chemical management of infested plants in houses. Additionally, in winter, L. botrana is in its pupal stage covered with a cocoon that prevents the penetration of chemical pesticides. For this reason, the objective of this work was to control the pupal stage with a formulation based on the entomopathogenic fungus Beauveria pseudobassiana in urban areas. Results: The strain RGM 1747 was identified as B. pseudobassiana by multilocus sequence analysis . The biocontrol activity of this formulated fungus against the infestation of vines with breeding pupae without cocoons showed 100% infection 21 days after inoculation under winter conditions. Finally, the biocontrol activity of the formulated fungus against natural infestations of L. botrana in winter in urban areas reached an efficacy of 51%. This result suggests that the B. pseudobassiana formulation is able to penetrate the cocoon and contributes to the integrated pest management of L. botrana .

scholarly journals Grape variety affects larval performance and also female reproductive performance of the European grapevine moth Lobesia botrana (Lepidoptera: Tortricidae)

2006 ◽  
Vol 96 (2) ◽  
pp. 205-212 ◽  
Author(s):  
J. Moreau ◽  
B. Benrey ◽  
D. Thiéry
Keyword(s):  
Host Plant ◽  
Adult Emergence ◽  
Lobesia Botrana ◽  
Larval Performance ◽  
European Grapevine Moth ◽  
Wild Grape ◽  
Larval Host ◽  
Fitness Index ◽  
Grapevine Moth

AbstractFor insect herbivores, the quality of the larval host plant is a key determinant of fitness. Therefore, insect populations are supposed to be positively correlated with the nutritional quality of their host plant. This study aimed to determine if and how different varieties of grapes (including the wild grape Lambrusque) affect both larval and adult performance of the polyphagous European grapevine moth Lobesia botrana (Denis & Schiffermüller). Significant differences were found in larval development time, but not in pupal mass, adult emergence rate, or sex ratio. Although the fecundity of females is not different among varieties, females fed on some varieties produced eggs of different sizes which are correlated to their fertility. Thus, females adapt resource allocation to eggs depending on their diet as larvae. Using a fitness index, the average reproductive output was found to be highest for females reared on cv. Chardonnay. Females reared on wild grape produced a fitness index identical to the cultivated grapes. However, Lambrusque and Gewurztraminer separate themselves from the cultivated varieties according to our discriminant analyses. It is emphasized, through this study, that cultivars fed on by larvae should be considered in the population dynamics of L. botrana and that egg number is insufficient to determine host plant quality.

Day/night variations of feeding and immune activities in larvae of the European grapevine moth, Lobesia botrana

2021 ◽  
Author(s):  
Corentin Iltis ◽  
Jérôme Moreau ◽  
Guillaume Gamb ◽  
Corentin Manière ◽  
Céline Boidin-Wichlacz ◽  
...  
Keyword(s):  
Lobesia Botrana ◽  
European Grapevine Moth ◽  
Grapevine Moth

Larval intraspecific competition for food in the European grapevine moth Lobesia botrana

2014 ◽  
Vol 104 (4) ◽  
pp. 517-524 ◽  
Author(s):  
D. Thiéry ◽  
K. Monceau ◽  
J. Moreau
Keyword(s):  
Life History ◽  
Intraspecific Competition ◽  
Life History Traits ◽  
Larval Mortality ◽  
Lobesia Botrana ◽  
Reproductive Capacity ◽  
Strong Increase ◽  
European Grapevine Moth ◽  
Grapevine Moth ◽  
Larval Crowding

AbstractEffective pest management with lower amounts of pesticides relies on accurate prediction of insect pest growth rates. Knowledge of the factors governing this trait and the resulting fitness of individuals is thus necessary to refine predictions and make suitable decisions in crop protection. The European grapevine moth, Lobesia botrana, the major pest of grapes in Europe, is responsible for huge economic losses. Larvae very rarely leave the grape bunch on which they were oviposited and thus cannot avoid intraspecific competition. In this study, we determined the impact of intraspecific competition during the larval stage on development and adult fitness in this species. This was tested by rearing different numbers of larvae on an artificial diet and measuring developmental and reproductive life history traits. We found that intraspecific competition during larval development has a slight impact on the fitness of L. botrana. The principal finding of this work is that larval density has little effect on the life history traits of survivors. Thus, the timing of eclosion, duration of subsequent oviposition, fecundity appears to be more uniform in L. botrana than in other species. The main effect of larval crowding was a strong increase of larval mortality at high densities whereas the probability of emergence, sex ratio, pupal mass, fecundity and longevity of mated females were not affected by larval crowding. Owing to increased larval mortality at high larval densities, we hypothesized that mortality of larvae at high densities provided better access to food for the survivors with the result that more food was available per capita and there were no effect on fitness of survivors. From our results, larval crowding alters the reproductive capacity of this pest less than expected but this single factor should now be tested in interaction with limited resources in the wild.

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