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Influence of Planting Date and Weed Interference on Sweet Corn Growth and Development

^a USDA-ARS, Invasive Weed Management Research, Univ. of Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801
^b Dep. of Agronomy and Horticulture, Univ. of Nebraska, 201 KCR, Lincoln, NE 68583

View larger version (15K): [in this window] [in a new window]   Fig. 1. Growing degree days (GDD) accumulated from emergence in relation to days after emergence for two planting dates in 2004 and 2005 at Urbana, IL. EARLY refers to a planting date the first week of May and LATE refers to a planting date the third week of June.

View larger version (24K): [in this window] [in a new window]   Fig. 2. Sweet corn height in relation to growing degree days (GDD) accumulated from emergence as influenced by planting date and weed interference in 2004 and 2005. Symbols represent the mean of four replicates and lines represent best fit of Eq. [1] on height. EARLY refers to a planting date the first week of May and LATE refers to a planting date the third week of June.

View larger version (24K): [in this window] [in a new window]   Fig. 3. Sweet corn leaf area index (LAI) in relation to growing degree days (GDD) accumulated from emergence as influenced by planting date and weed interference in 2004 and 2005. Symbols represent the mean of four replicates and lines represent best fit of Eq. [1] on LAI. EARLY refers to a planting date the first week of May and LATE refers to a planting date the third week of June.

View larger version (24K): [in this window] [in a new window]   Fig. 4. Sweet corn total aboveground biomass in relation to growing degree days (GDD) accumulated from emergence as influenced by planting date and weed interference in 2004 and 2005. Symbols represent the mean of four replicates and lines represent best fit of Eq. [1] on biomass. EARLY refers to a planting date the first week of May and LATE refers to a planting date the third week of June.