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Susceptibility of Some Tunisian Broad Bean Varieties to Injuries Caused by the Broad Bean Weevil Bruchus rufimanus in North Tunisia
oleh: Faten Titouhi, Moez Amri, Jouda Mediouni-Ben Jemâa
Format: | Article |
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Diterbitkan: | Institution of the Agricultural Research and Higher Education 2015-06-01 |
Deskripsi
This work aims to investigate for the first time the susceptibility of six Tunisian broad bean varieties: two large seeded varieties i.e. Chahbi and Mamdouh and four small seeded varieties namely Chourouk, Bachaar, Najeh and Badï, to natural field injuries caused by the broad bean weevil Bruchus rufimanus in the region of Béja. Results showed that the large seeded varieties appeared to be more infested than field ones. The infestation rates were 37 and 37.5% for Chahbi and Mamdouh, respectively, while for the small seeded varieties, infestations ranged between 29.5 and 6.5% with Badï as the less infested variety. Moreover, seed germination was considerably affected by B. rufimanus. Significant differences were observed between infested and non-infested seeds for all varieties. The highest germination reduction was obtained with Mamdouh variety with a rate of 32.98% whereas the lowest value was achieved with Chourouk variety (10.2%). In addition, results indicated that B. rufimanus larvae feedings produced significant loss in broad bean seeds weight for all studied varieties. The highest weight loss was observed for small seeded varieties Najeh and Bachaar with weight reduction of 9.67 and 9.37%, respectively.