A new source of resistance to Hessian fly (Diptera: Cecidomyiidae) identified in an Algerian bread wheat collection
1996
El Bouhssini, M. | Lhaloui, S. | Naber, N. | Mergoum, M. | Benbelkacem, A. | Hatchett, J.H.
Hessian fly, Mayetiola destructor (Say), causes heavy damage on both durum and bread wheats in Morocco. Major effort has been put on host plant resistance to control this pest. Field and greenhouse screenings of an Algerian bread wheat collection were carried out in Morocco to look for new sources of resistance to Hessian fly. Results showed that the line ADC14 is moderately resistant to this insect. This is the first source of resistance to Hessian fly in Morocco identified in a North African wheat. The presence of dead first instars on resistant plants indicates that antibiosis is the mechanism responsible for the resistance of ADC14. However, about 18 of the resistant plants had live larvae. The deployment of varieties that allow for larval survival on resistant plants should be encouraged. This type of resistance would reduce selection for biotype development. This new source of resistance is being used by Moroccan breeders in the bread wheat improvement program
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