Abstract
Commercial southern pea varieties, experimental breeding lines, and plant introductions were evaluated in the field for resistance to Chalcodermus aeneus Boheman. Varieties showed significant differences in numbers of external punctures on the pod and internal infestation (slings, eggs and larvae) Oil the pea within the pod. There was no significant correlation between numbers of external punctures and internal infestation. An antibiotic factor was associated with the hull. There were significant negative correlations between hull thickness and internal infestation. Thick-hulled varieties had fewer stings, eggs, and larvae than thin-hulled varieties. Fewer punctures penetrated the hull, and fewer stings contained eggs or larvae. These varieties also had more external punctures than thin hulled varieties. It is concluded that the female required numerous probes of these thick-hulled varieties before locating a suitable oviposition site.
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