EC Cucumber Production Practices for Nebraska

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1 University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Historical Materials from University of Nebraska- Lincoln Extension Extension 1969 EC Ccmber Prodction Practices for Nebraska H. M. Eisa D. S. Nland R. B. O'Keefe Follow this and additional works at: Eisa, H. M.; Nland, D. S.; and O'Keefe, R. B., "EC Ccmber Prodction Practices for Nebraska" (1969). Historical Materials from University of Nebraska-Lincoln Extension This Article is broght to yo for free and open access by the Extension at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclsion in Historical Materials from University of Nebraska-Lincoln Extension by an athorized administrator of DigitalCommons@University of Nebraska - Lincoln.

2 Cooperative Extension Service, University of Nebraska College of Agricltre and Home Economics, and U.S. Department of Agricltre Cooperating E. F. Frolik, Dean; J. L. Adams, Director

3 CUCUMBER Prodction Practices for Nebraska H. M. Eisa, D. S. Nland, R. B. O'Keefe 1 and H. E. Kmpost 2 Ccmbers, a promising crop, have recently been prodced on a commercial scale in northeast Nebraska, mainly for pickles. Ccmbers are a warm season crop. They are frost sensitive and shold have a monthly temperatre average of F with a minimm of 60 and a maximm of goo. Higher temperatres do not hrt the plants as long as moistre content of the soil is adeqate. The minimm soil temperatre for planting ccmbers is 60 F. The crop reqires days from planting ntil harvest, depending on the variety. Planting dates in different locations in Nebraska, the estimated days for seedling emergence and days from planting to harvest are shown in Table 1. Table I. Planting dates, estimated days for seedling emergence; and the days to harvest in different locations in Nebraska. Planting Days to Days to Location date emergence harvest a Lincoln 5/ / / / / North Platte 5/ / / / /30 3 Alliance 6/3 ll 62 6/ / / / Northeastern Nebr.h 5/ / /17 8 5/24 7 5/31 6 Based on niform trials with SMR-58 in b Based on climatological data. llassistant Professor, Assistant Professor and Associate Professor, Dept. of Horticltre and Forestry, Univ. of Nebraska, Lincoln..2/Extension Agent, Pierce Conty. 3

4 Sites and Soils for Ccmbers Ccmbers can be grown sccessflly in most soils in Nebraska. Emphasis shold be given to choice of site. For the convenience of management and harvesting, choose a field close to a farm road and a farmstead. Ccmbers grown for mechanical harvesting-one of the rows already harvested. If ccmbers are grown where wind is a problem, choose a field protected by a shelterbelt or interplanted with tall growing crops other than com. Corn is the alternate host for the ccmber beetle. Avoid fields where weeds were a major problem in the previos crop or where Atrazine or other residal herbicides were sed. The seed bed for ccmbers is prepared by plowing to a depth of 5 to 7 inches, disking and harrowing. The front part of the ccmber mechanical harvester.

Varieties When growing ccmbers for a commercial pickle company, se varieties recommended by the company. Scab and mosaic resistant varieties are essential.

5 Varieties When growing ccmbers for a commercial pickle company, se varieties recommended by the company. Scab and mosaic resistant varieties are essential. There are two types of ccmbers-monoecios and gynoecios. Monoecios types prodce male and female flowers on the same plant. Gynoecios types prodce only female (frit) flowers. Monoecios types mst be interplanted with gynoecios types for pollination. Ten to fifteen percent of the monoecios type seed is mixed with the gynoecios type. For pickling both varieties SMR 58, and NK 804 or the monoecios type have performed well in Nebraska. Gynoecios hybrid varieties of the pickling type are: Spartan Dawn, Crsader, Piccadilly, Crispy, Pioneer, N K 805 and others. Slicing types inclde varieties sch as Tablegreen 65 (SMR) and Marketmore (SMR). Evalation of other varieties and hybrids is nder investigation. A ccmber frit showing scab symptoms. Healthy and mosaic infected frits side by side. Spacing and Seeding For pickling, rows are sally 40 inches apart and cold be less (20 to 30 in.). For convenience in hand picking, space plants 24 to 40 inches apart. For slicers, rows are 5-6 feet apart and the plants inches in the row. Mechanical harvesting is in the experimental stage and will have a great impact on spacing for growing pickling ccmbers. 5

6 I n genera I, the crop is direct seeded at the rate of 1. 5 to 2 I bs. per acre depending on row spacing. For an early crop of slicers, transplanting may be done after starting seed in bands or peat pots which hold the soil arond the roots in setting. In this case lb. is needed for growing transplants for an acre. Fertilizer Bild p the soil before planting ccmbers by plowing down manre (15 to 20 ton/a) or alfalfa, clover or rye. Plow down 30 lbs. N/A with green manre crops. A ph of 5.5 to 6.8 is optimm for ccmbers. However, ccmbers grow well at higher ph if fertilized properly. Fertilizer rates shold be adjsted according to the soil test. Ccmbers reqire the following levels of ntrients when grown on mineral soils: lbs. of Nand Pf.5/A and lbs. of KfJ/A. Half of the fertilizer shold be broadcast and the other half applied in bands 2 inches below the seed and 2 inches to the side of the row; or drilled in deep after plowing. Sidedressing with lbs. of N/A when vines begin to spread is important if nitrogen has been leached by freqent rains. It is essential to sidedress the gynoecios types with extra nitrogen to help maintain plant vigor and to redce the nmber of "nbbins" later in the season. Weed Control Recommended herbicides are: 1. Alanap 3: Apply immediately after planting in warm soils at the rate of 1. 5 gal. of the commercial prodct/ A or 3 lbs./ A of the active ingredient. Avoid se on extremely early plantings when soil is cold. Alanap is mainly effective for annal broad leaf weed control and incorporation into the soil may be beneficial. Sfficient moistre in the form of rain or irrigation shold be sp pi ied for the activation of the chemical. 2. Prefar (benslide): Apply as preplant at the rate of 1.5 gai./a of the commercial prodct or 6 lbs. of active ingredient/a. It gives good control of annal grassy weeds bt is weak on broadleaf weeds. Its se is beneficial. Certain crops are sensitive to Prefar 4E bt can be planted 18 months after application. Check the label for the specified crops and freqency of Prefar application. 3. Dyanap: Preliminary tests in 1969 indicate excellent control is obtained with the chemical at 1. 5 gal/ A. Cltivation Thin ccmber plants when they are abot 6 inches high. If planted in hills thin to 2 plants per hill. If drilled in rows, thin to 24 to 40 in. between plants depending on row spacing. Ct plants off with a sharp hoe; do not pll plants. Plling plants damages roots of remaining plants. To avoid root injry never cltivate deeper than 2 inches. Cltivate wherever necessary to control weeds; and se sweep type implements, not 6

7 shovels. One hand weeding may be necessary to remove in row weeds if a herbicide has not been sed. Irrigation Ccmbers and other members of the ccrbitaceos family are sensitive to lack of water. Preplant irrigation to fill the soil profile to a depth of 3 feet is desirable. Ccmbers root to a depth of 3 to 4 feet. Wilting and flaccid appearance of leaves sally indicates a need for water. Frrow or sprinkler irrigation is desirable for obtaining best yields. Irrigation dring hot weather ( F) shold be done freqently, sing small amonts of water ( 1 to 2 inches). A general rle is that ccmbers need 1 to 2 inches of moistre each week in the form of rain or irrigation for maximm growth and prodction. Insect Control The two most troblesome insects are the spotted and striped ccmber beetles. Both insects are carriers for the bacterim casing bacterial ccmber wilt. The beetles and the bacterim are intimately related becase the bacterim overwinters in the beetles. Eradication of the beetles is the only control for ccmber wilt. Other insects sch as aphids and mites may case problems. One of the following insectic.ides may be sed for controlling insects: 1. Carbaryl (Sevin): In case of spraying, 1.251bs./A of 80% WP are sed. With dst eqipment, se 5% dst over the row or hills. Sevin controls the beetles bt it is very toxic to bees. 2. Methoxychlor: 2 lbs./a of 50% WP or 5% dst. Methoxychlor provides good control for beetles and vine borers and is less toxic to bees. 3. Malathion: 2 lbs./a of 25% WP or 5% dst. (Effective for aphids and mites bt not ccmber beetle.) 4. Kelthane: 18.5% WP at 2-31bs./A for control of mites. 5. Tedion: 25% WP at 2-3 lbs./a for control of mites. Early control is essential to avoid a bild-p of insects. Start beetle control at time of field setting or plant emergence and contine as needed. Spray in the afternoon and evening to avoid injry to plants de to "brning" and the killing of bees. Bees are beneficial for pollination of female flowers. Poor pollination reslts in a redced frit set and a high percentage of misshapen frit. Disease Control The seed companies sally treat the seed with fngicides to control seed and soil-borne diseases. Damping off of seedlings: Sprinkle or spray Captan 50 over the row at the rate of 1 lb. active ingredient in 100 gal. of water. Other leaf and frit diseases and their controls are shown in Table 2. Application rates for chemicals shold follow recommendations on the label. 7

8 ,~ ~ ~ - ---~- - Table 2. Ccmber leaf and frit diseases and their controls. Powdery Anglar Leaf Spot G Alternaria E? Anthracnose F E E ::::=Excellent, G:::::: Good, F ==Fair and lj :::Unsatisfactory a Use in ombination or as alternate sprays for effective control. G Powdery mildew symptoms on the leaves. Anglar leaf spot symptoms on the leaves. 8

9 Trrning Vines For pickles, harvesting starts 4-5 days after the opening of the female flowers. The smaller the frit the less the yield bt the higher the price paid per 100 lbs. The following grades are set p for pickling ccmbers: No.1-p to one inch ( 1 ") in diameter. No.2-from one inch (1") to one inch and one-forth (1 1/4"). No.3 -from one and one-forth inch (1 1/4") to one and three-forths inches (1 3/4") in diameter. No.4-from one and three-forths inches ( 1 3/4") to two and one-sixteenth inches (2 1 /16") in diameter. Do not allow anv frit to matre on the vine, particlarly before the first picking. Matre frits redce the set and qality of later frits. Harvest every 2 to 3 days depending on frit development. Pick bt leave all misshapen frit in the field. Misshapen frit is not marketable. Pick thoroghly at each picking. The picking season is generally 6 to 8 weeks long. Ccmbers for pickling mst be delivered to the processor within 24 hors of picking. Hal in refrigerated trcks or dring the night. Harvested pickles shold not be left in the sn since they will lose weight and qality. Deliver to the bying stations in wooden containers of abot one bshel capacity the day they are harvested. Abbreviations SMR =Scab Mosaic Resistant; Oz =Once; WP =Wettable Powder; A= Acre. 9

Pepper IPM Elements Revised March, 2012

Pepper IPM Elements Revised March, 2012 Edited by Jim Jasinski Contributing Authors: Celeste Welty (Entomology); Bob Precheur, Mark Bennett, Doug Doohan (Horticulture & Crop Science); Sally Miller (Plant