Submitted to: HortScience
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: April 3, 2003
Publication Date: August 20, 2003
Citation: McCreight, J.D. Reactions of 20 melon cultigens to powdery mildew race 1 in field and growth chamber tests. HortScience. 2003. v. 38:Abstract p. 735. Technical Abstract: Powdery mildew incited by Sphaerotheca fuliginea (Schlecht ex Fr.) Poll. (SF) and Erysiphe cichoracearum DC ex Merat reduces yield and quality of melon (Cucumis melo L.) production worldwide. There are many sources of resistance to the 11 races of S. fuliginea and two races of E. cichoracearum, but knowledge of their reactions to other races, inheritances and allelic relationships is often unknown, incomplete, or has not been verified. Twenty melon cultigens wee evaluated for their reaction to SF race 1 in two open field tests in Imperial Valley, California and one growth chamber test in Salinas, California. The 11 SF race differentials reacted as expected to SF race 1. Iran H, which had not been tested previously against a U.S. population of SF race 1, was susceptible in all three tests. Consistent with previous reports, 'Perlita', 'Seminole', PI 179901, PI 234607 and PI 313970 were resistant in all three tests. 'Amarillo', 'Moscatel Grande' and 'Negro', previously reported resistant to SF race 1 in Spain, were resistant in the field tests, but were highly susceptible in the growth chamber. PI 236355, which was previously reported resistant to SF race 1, was susceptible in all three tests.