Fortuna Taiadjana, Anne M., Le Gonnidec M., Jeannette Rémi, Bressac C., Rebaudo François, Mougel F., Kaiser L. (2023). Susceptibility to cold suggests low risk of establishment of a tropical parasitoid attacking the corn pest Sesamia nonagrioides. Biological Control, 186, p. 105359 [10 p.]. ISSN 1049-9644.
Titre du document
Susceptibility to cold suggests low risk of establishment of a tropical parasitoid attacking the corn pest Sesamia nonagrioides
Fortuna Taiadjana, Anne M., Le Gonnidec M., Jeannette Rémi, Bressac C., Rebaudo François, Mougel F., Kaiser L.
Source
Biological Control, 2023,
186, p. 105359 [10 p.] ISSN 1049-9644
Low temperatures limit the distribution and performance of many crop pests and their natural enemies in nonnative areas. Here we evaluated the lower thermal thresholds for survival, development and reproduction of the tropical species Cotesia typhae Fernandez-Triana (Hymenoptera: Braconidae), a gregarious larval parasitoid of Sesamia nonagrioides Lefe`bvre (Lepidoptera: Noctuidae), an important corn pest in southern Europe. C. typhae is highly host specific and a very efficient biocontrol agent of S. nonagrioides in greenhouse, with minimal impact on non-target species. Immature and adult stages of the parasitoid were exposed to five constant temperatures ranging from 5 to 27 degrees C. High mortality was observed in all immature stages below 15 degrees C and thresholds for egg, larval, and external pupal development were between 10 and 15 degrees C. Adult locomotor activity decreased dramatically within this temperature range, and males were more susceptible to cold than females. Given these thermal limitations and based on winter temperatures recorded over the past 20 years, we estimated that C. typhae had a low probability to survive in French winters. This finding supports the safe use of C. typhae as an augmentative biological control agent against S. nonagrioides.
Plan de classement
Sciences du monde végétal [076]
;
Biotechnologies [084]
Description Géographique
FRANCE ; EUROPE ; AFRIQUE SUBSAHARIENNE ; ZONE TROPICALE
