Abstract
Since no acceptable levels of resistance to
In free-choice and no-choice test adult oviposition preference and larvae seed-penetration preference was tested. A mean of 49.8 eggs per pod in resistant varieties versus 136,4 eggs per pod in susceptible varieties were found.
When an age-specific life table was developed, the net reproductive rate (Ro) calculated was lower in the resistant variety than in the susceptible check. Pods and seed-coat were studied as factors negatively influencing the capacity of the insect to successfully colonize the wild accessions. The seed coat affected insect development slightly but the greatest effect was found when the insect fed on the cotyledons.
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