Response of some maize varieties to angoumois grain moth, Sitotroga cerealella (Olivier).
1996
Emana Getu | Asefa Gebre Amlak
Maize is an important crop grown in Ethiopia. It is first in total production and yield per hectare. Farmers in Ethiopia produce on an average one to three tons of maize grain per season. The grain is stored for 6-9 months during which time heavy losses are encountered due to attack by Sitotroga cerealella and other stored grain pests. Different maize varieties respond differently to the attack of stored maize grain insect pests. Hence, varieties were screened against S. cerealella in free choice and no choice tests. Both tests were carried out in completely randomized design in three replications. The parameters used were number of F1 moths, percent kernel damage, length of development period, index of susceptibility and percent weight loss. Among the varieties tested UCB, H-8 151 and H-501 in free choice test, and H-8151 and H-501 in no-choice test were found to be resistant. Both antixenosis and antibiosis type of resistance were observed in the resistant varieties. Number of emerged F1 moths, percent kernel damage and percent weight loss were found to be important parameters in screening maize varieties against S. cerealella.
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