Vegetable production

The varieties Armado April and Armado Quick (Elsoms, Ltd.) were seeded in 2-inch pots in the greenhouse on August 1, August 16, and August 30, 1978, and were transplanted to the field on August 21, September 12, and September 26, respectively. Plots consisted of two 25-foot rows. Treatments were 1) 50 pounds N/acre as ammonium nitrate applied on December 22, 1978, and again on February 26, 1979, and 2) 100 pounds N on the same dates. Treatments were in randomized block design. Heads were harvested twice weekly from April 13 until May 9, 1979.

Seven varieties were direct-seeded on July 13, 1977. All varieties except Pinnacle (Asmer Seed Co.) were from Elsoms, Ltd. Plot size was one 24-foot row with the stand thinned to approximately one foot between plants. An additional 225 pounds/acre of ammonium nitrate (34-0-0) was applied on February 2, 1978. Harvest commenced on March 16 and heads were harvested two or three times per week until May 8.

Objective 1: Evaluate sweet corn inbred germplasm for colonization of silks by Fusarium species and subsequent seed infection/contamination. Objective 2: Evaluate biological applications to silks and subsequent Fusarium presence in ears. Objective 3: Evaluate seed disinfestation and location of remaining Fusarium on or in seed. Objective 4: Examine the yield and disease levels of sweet corn plants grown from seeds treated with germicidal light.

Fifty-three preliminary OSU breeding lines along with Savannah, 91G, OR54, OSU 5630, and OSU 5669 as checks were processed in the 2009 OSU Preliminary Breeding Trial. In the Commercial Trial, seventeen commercial selections were processed along with four checks:. OR 91G, OR 54, OSU 5630, and OSU 6443.

Objective: Identify sweet corn hybrids with suitable processing quality that have high, stable yields and tolerance to root rot disease complex.

Drift or volatilization of chlorophenoxy herbicides with resultant damage to non-target plants is an increasing problem in the Willamette Valley. The number of damage claims is increasing each year despite growing regulation and training of growers and applicators. The effects of lethal doses of the chlorophenoxy 2,4-D on broadleaf plants are well-known, but except for a few crops such as tomatoes and grapes, the effects of sublethal doses have not been well documented.

The purpose of this study was to investigate the effect of several combinations of soil pH and nitrogen fertilizer rates on yield and mineral uptake of bush beans, carrots, and crisphead lettuce. Of particular concern are the nutrient elements potassium, calcium, phosphorus, magnesium, zinc, and copper, and heavy metals such as manganese which may be toxic to plants if present in sufficient quantity. Optimal soil pH levels are not well known for many vegetable crops and probably vary with soil type, cation exchange capacity, amount of organic matter etc.

Research report from OSU's North Willamette Research and Extension Center

Delbert Hemphill
OSU Dept of Horticulture, NWREC

Research report from OSU's North Willamette Agricultural Research and Extension Center

Delbert Hemphill
OSU Dept of Horticulture, NWREC

N. Mansour
OSU Dept of Horticulture