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Abstract
Cantaloupe (Cucumis melo L. var. cantaloupensis) crop is one of the most important economic vegetable crops in North Sinai Governorate. It is attacked by many fungal diseases at all growth stages, among these disease root rot/ vine decline which is a world-wide problem particularly in arid and semi-arid regions under warm and hot weather conditions. The occurrence of wilt and root rot of cantaloupe was studied in four localities in North Sinai Governorate i.e. Bir El-Abd, El-Arish, El-Sheikh Zwied and Rafah.
Proof of pathoginicity of the main isolated pathological fungi was carried out at two different experiments Monosporascus cannonballus proved to be the most virulent pathogen. Physiological studies i.e. different culture media and different temperatures on M. cannonballus were studied. Corn meal agar (CMA) medium proved to be the most proper media for M. cannonballus growth and sporulation. The optimum temperature for linear growth for the fungus was 25 C°.
M. cannonballus control was studied in vitro and in vivo. The combination between Topsin M-70 and Bio-Zeid was the best treatment for increasing cantaloupe plant resistance to disease. The combination between Vitavax 200 and Bio-Zeid was the best treatment for increasing total yield per feddan.
Susceptibility of cantaloupe cultivars to infection with M. cannonballus under greenhouse and field conditions was studied. Cantaloupe cultivar Galia showed the highest resistance to infection with M. cannonballus. Galia also performed agronomically as the best tested cultivar, mostly due to increasing morphological characters, vegetative growth (fresh and dry) characters and the highest total (early, mid and late) yield per feddan.