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Plant Disease Management: Sugar Beet Powdery Mildew

Powdery mildew is a sporadic fungal leaf disease of sugar beet in the Red River Valley and southern Minnesota sugar beet-production areas. It first was found in Minnesota and North Dakota in 1975. In recent years, the use of triazole and strobilurin fungicides for Cercospora leaf spot control has limited powdery mildew development. Recent discoveries of the sexual stage of the powdery mildew fungus in several sugar beet producing states could lead to potential biological changes in the fungus, making it more difficult to control.

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Potato Tuber Second Growth

The term secondary growth is often described as heat sprouts, tuber chaining and tuber malformations. This physiological disorder decreases yield and quality of all potato tubers. Good management and varietal selection can minimize this.

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Potato Tuber Viruses: Mop-top Management

The Potato mop-top virus causes tuber quality problems. Infection on tubers may be expressed as arcs or rings on the tuber surface, deep cracking and distortions to the skin that compromising tuber quality. Care must be taken not to infest fields with PMTV from known powdery scab and PMTV infected fields. Additionally, avoiding PMTV or powdery scab-infected seed tubers and using cultivars that are insensitive to mop-top can help prevent this problem.

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Powdery Scab of Potatoes

Spongospora subterranea f. sp. subterranea (referred to as S. subterranea), the causal agent of powdery scab and root gall formation in potato, is a soil- and tuber-borne funguslike pathogen. S. subterranea first was reported in the U.S. in 1913. During this same year, the disease was found established in potato-growing states such as Maine, Florida, Minnesota and Oregon. To date, the pathogen can be found causing disease throughout the U.S., as well as several other potato-growing regions around the world.

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Pulse Crop Production Field Guide for North Dakota

The Pulse Crop Production Field Guide provides producers with data on field pea, chickpea and lentil production information throughout North Dakota. It addresses issues including variety fertilizing, disease, insect and weed control, harvesting and storing of pulses.

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Safflower Production

This publication provides background information on how to grow safflower in ND, from land selection, fertilizer management, variety selection, seeding, weed management to harvesting and marketing the crop. Safflower is an annual oilseed crop adapted primarily to the central grain areas of the western Great Plains.

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Selected Management Factors for Economically Increasing Soybean Yield

Soybean yield increased with 14-inch versus 28-inch rows, 200,000 versus 150,000 pls/acre planting rate and special foliar inputs. The narrow rows also had higher net revenue than 28-inch rows. However, the low planting rate and no foliar inputs provided higher net revenue after costs of research factors versus the alternative choice for each factor.

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Selecting a Sprinkler Irrigation System

The four basic methods of irrigation are: subsurface irrigation (“subirrigation,” which uses tile drain lines), surface or gravity irrigation, trickle irrigation (also called drip irrigation) and sprinkler irrigation. Of the acres currently irrigated in North Dakota, more than 80 percent use some type of sprinkler

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Soybean Gall Midge and White-mold Gall Midge in Soybean

This publication describes two species of gall midges that infest soybeans. Soybean gall midge is an invasive and economic insect pest of soybeans that occurs in five Midwestern states (Iowa, Minnesota, Missouri, Nebraska and South Dakota). It does not occur in North Dakota yet. The white-mold gall midge is native to North America and is not economic insect pest of soybeans. Larvae of the white-mold gall midge can be found feeding on Sclerotinia white mold disease in stems and pods. This publication describes how to scout and identify the two species based on their location on plants, field symptoms and plant injury symptoms. It also tells pest managers what to do if you find any suspect soybean gall midge in your soybean fields in North Dakota.

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Soybean Production Field Guide for North Dakota

The North Dakota Soybean production field guide provide producers with data fo soybean production information throughout the state. It addresses issues from variety selection, growth and fertilizing, disease, insect and weed control, harvesting and storing of soybeans.

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Soybean Soil Fertility

All of NDSU soil fertility recommendations now have no yield-based formulas. The soybean fertility recommendations were modified to be in line with these new guidelines.

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Spray Equipment and Calibration

Many pesticides used to control weeds, insects, and disease in field crops, ornamentals, turf, fruits, vegetables, and rights-of-way are applied with hydraulic sprayers. Tractor- mounted, pull-type, pickup-mounted and self-propelled sprayers are available from numerous manufacturers to do all types of spraying.

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