Page Banner

United States Department of Agriculture

Agricultural Research Service

Title: Germination of Cucurbit and Pigweed Seeds in Response to Temperature

Authors
item Webber, Charles
item Roberts, B.W. - OKLAHOMA STATE UNIVERSITY
item Shrefler, J.W. - OKLAHOMA STATE UNIVERSITY
item Duthie, J. - OKLAHOMA STATE UNIVERSITY

Submitted to: Hortscience Proceedings
Publication Type: Proceedings
Publication Acceptance Date: March 1, 2000
Publication Date: N/A

Interpretive Summary: Adverse soil temperatures can decrease seed vigor and germination, resulting in decrease crop stands. Maximizing crop stand establishment and minimizing weed competition is essential to optimize yields. A greater understanding of the effects of temperature on crop and weed germination will enhance the development of integrated crop production and weed control lsystems that will assist in the selection of the best cultivars and herbicides for the appropriate cultural situations. The crop and weed seed responses to temperature will continue to have an increasing influence on the herbicide formulation process as new temperature controlled released herbicides are developed. Research was conducted to determine the response of six cucurbit cultivars and two pigweed species when exposed to sixteen temperatures ranging from 51 to 109F. Although the early percent germination for the watermelon cultivars was greater at one temperature range, the final optimal germination temperatures were actually lower than was first indicated. The research also showed a germination advantage for Allsweet (a diploid cultivar) through the middle to higher temperatures, and increased germination for Crimson Trio (a triploid, seedless cultivar) at two of the lower temperatures. The watermelon cultivars also germinated slower than that the other cucurbits and the pigweeds. The cantaloupe cultivars were the only cucurbits with any germination at the highest temperature, 109F. The cucumber cultivars produced the fastest and greatest seed germination, generally producing near optimum germination within 3 to 5 days. The two pigweed species exhibited the greatest variation in response to temperatures of all the seeds tested. The research demonstrated that even cultivars within a specific cucurbit crop respond

Technical Abstract:

Last Modified: 7/28/2014
Footer Content Back to Top of Page