![]() ![]() Illinois is the most significant pumpkin producing state with over 15,000 acres planted for processing and ornamental markets during fall months ( USDA, 2011). Pumpkins are an important crop in the United States with ≈50,200 acres planted in 2010 representing a total value of $116 million. Keywords: Sphaerotheca fuliginea Podosphaera xanthii Cucurbitaceae Cucurbita pepo A high-input fungicide program may be necessary to maintain yields of varieties with low cucurbit PM resistance. These results suggest that yields can be maintained with a minimal fungicide program when using a variety with high cucurbit PM resistant in some environments. ![]() In 2010, unsprayed ‘Camaro’ had less disease than ‘Aladdin’ or ‘Howden’ that had received the high-intensity fungicide program. In 2009, unsprayed ‘Camaro’ had similar AUDPC values as ‘Aladdin’ and ‘Howden’ treated with low- or high-input fungicide programs. In both years, PM disease severity, characterized by the area under the disease progress curve (AUDPC), was lowest on ‘Camaro’ and highest on ‘Howden’. With the exception of cull percentage in 2009, there were no fungicide program by variety interactions for yield parameters. In 2010, yield significantly increased with the intensity of fungicide program. The high-resistance variety, Camaro, had the greatest yields in both years, while Howden, with no PM resistance, had the lowest yields. Yield increases corresponded to the level of cucurbit PM resistance. In 20, variety significantly affected yield. There were no significant variety by fungicide program interactions for yield, number fruit per acre, and average fruit weight in both years. Varieties tested were Howden, Aladdin, and Camaro, which had no, moderate, and high levels of cucurbit PM resistance, respectively. Three fungicide programs consisted of a no-fungicide control, low input (chlorothalonil), and high input (chlorothalonil alternated with myclobutanil) were applied to three varieties of pumpkin with different levels of cucurbit PM resistance. The effects of fungicide program and varietal resistance on the development of cucurbit powdery mildew in pumpkin ( Cucurbita pepo) were tested in 20 in Lexington, KY. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |