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| Weeds | |
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Weeds can be a serious problem in wheat. They compete with the wheat for moisture and nutrients. There are broadleaf weeds and grassy weeds. The most common broadleaf weeds belong to the mustard family. Mustards are winter annuals and they germinate and emerge in the fall at the same time wheat does. This is a young field pennycress plant and it is a mustard. This picture was taken in the fall and the plant is in the rosette stage. In the spring a stem will form. |
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This is a field pennycress plant. It has white flowers and grows up to 2 feet tall. Pennycress is common in central and eastern Kansas. |
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This is tansy mustard in the fall rosette stage. It is common in central and western Kansas. |
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This is tansy mustard in the spring flowering stage. It can grow to 2 to 3 feet tall. It has yellow leaves at the top of the plant. The seeds will be in short, thin pods. |
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This is treacle mustard, also called bushy wallflower, in the fall rosette stage. It is common in central and eastern Kansas. Its leaves are similar to those of dandelions. |
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Treacle mustard only grows to 1 ½ feet tall. It has yellow flowers at the top of the plant. Seeds are produced in long, thin pods. |
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Wild buckwheat is a summer annual that emerges early in the spring. This weed has a vining growth habit. |
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As wild buckwheat grows it wraps around wheat plants and causes harvest problems. It has heart-shaped leaves and it is often confused with field bindweed. |
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Field bindweed is a perennial that can grow from seeds or established roots. Its leaves are arrowhead-shaped. |
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Field bindweed has a vining growth habit and it produces white or pink flowers. This weed is very difficult to control. |
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Winter annual brome grasses such as, cheat, downy brome, and Japanese brome usually emerge in the fall at the same time as the wheat. They are difficult to identify as seedlings. |
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As the brome species mature they can be identified easily. Cheat is on the left, Japanese brome is in the center, and downy brome is on the right. These grassy weeds are common in continuous wheat fields (wheat planted in the same field every year) where they are difficult to control. They can be controlled effectively in a crop rotation with summer row crops. |
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