Grains Field Manuals

Nitrogen Deficiency
Retarded growth. Plants become light green or yellow with the oldest…
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Phosphorus Deficiency
Stunted growth. Leaves small and darker green than usual, may develop…
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Potassium Deficiency
Stunting effect due to shortening of the internodes. Leaf symptoms are a…
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Magnesium Deficiency
Occurs most frequently on acid soils. The older leaves show a "chain-like"…
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Sulfur Deficiency
Small, spindly plants having a light green to yellowish-green color in the…
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Zinc Deficiency
Stunted plants, shortened internodes, the area between the midrib and leaf…
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Iron Deficiency
Usually occurs on alkaline soils. Chlorosis or yellowing between veins of…
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Manganese Deficiency
Similar to iron deficiency except interveinal chlorosis pattern first…
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Copper Deficiency
Younger leaves lose turgidity, appear to wilt, lose color, may break, tips…
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Boron Toxicity
Boron toxicity on barley. Boron toxicity is characterized by leaf tip…
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Bacterial Blight
Infects barley, wheat and durum. Wild barley and smooth brome are hosts.…
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Pseudomonas Blight
A bacterial disease of winter wheat characterized by large irregular dead…
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Spot Blotch
Same fungus that causes root rot. Affects barley, durum and spring wheat.…
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Net Blotch
Affects only barley. A characteristic "netting" of the dark,…
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Powdery Mildew
Occurs on cereal grains and grasses. It is of more importance on barley…
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Septoria Leaf Blotch
Barley varieties are susceptible. Attacks spring wheat and durum also.…
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Septoria Leaf Blotch
Most barley varieties are resistant. Other crops are not affected. The…
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Cephalosporium Stripe
Attacks mainly winter wheat. Causes distinct yellow stripes on the leaf…
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Fungal Leaf Spot
A fungus disease of wheat, causing spots ranging from small, dark flecks…
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Leaf Rust
A fungus disease of wheat caused by rust spores blown in and landing on…
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Stripe Rust
A fungus disease common on wheat, barley, rye and many grasses. It…
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Stem Rust
A serious fungus disease of wheat, barley, oats, rye and many grasses. It…
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Root Rot
Hosts are durum, hard red spring wheat and barley. Diseased seedlings have…
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Take-all
Infects wheat, barley, rye, oats, timothy, brome grass, redtop, bluegrass,…
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Foot Rot
Often called straw-breaker foot rot. The major host is winter wheat.…
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Loose Smut
Some barley varieties are resistant; others are susceptible. Other crops…
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Covered Smut
Most barley varieties are susceptible. Other crops are not affected. Smut…
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Dwarf Bunt
A major disease in winter wheat. Positive symptoms become apparent only…
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Typhula Blight
Occurs on winter cereals. It is also called "speckled" or "gray" snowmold.…
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Pink Snowmold
Winter wheat and rye and the grasses are damaged where snow cover is heavy…
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Ergot
It attacks cereals and grasses all over the world. The most common sign of…
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Barley Stripe Mosaic Virus
One of the few plant viruses transmitted through the seed. It is also…
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Wheat Streak Mosaic Virus
Winter wheat is usually infected in the fall, but symptoms do not normally…
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Yellow Dwarf Virus
Attacks wheat, oats, barley, rye and many wild grasses. Known as "red…
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Large Physiologic Spot
Brown to black, circular to oblong, dry spots with a regular margin…
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Cereal Leaf Beetle
Cereal leaf beetles take their nourishment from grain shoots or from…
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Greenbug
This insect is important not only from the standpoint of feeding damage by…
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Hessian Fly
Injury by the Hessian fly is not conspicuous. Infested wheat becomes…
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Armyworm
Armyworms occur where there is a very rank growth of vegetation or where…
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Grasshopper
The most injurious cropland grasshoppers include the migratory,…
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Wheat Stem Maggot
The first indication of the presence of this insect is usually the dying…
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Wheat Stem Sawfly
Damage is two-fold. First, they cause reduction of yield by their…
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Wireworm
These yellow to reddish brown, wire-like insects live in the soil for…
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Barley Thrips
Several species of thrips attack small grain; the most important is the…
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Pale Western Cutworm
The pale western cutworm is an underground feeder. The body is grayish,…
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Brown Wheat Mite
Plants damaged by the brown wheat mite have yellowing which can be…
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