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The roots need air and good drainage to thrive, and if they don’t get it, brown patches can show up. Pests: Insects like grubs can damage grass roots, leaving behind dead, brown spots.
How to Prevent Crabgrass. Certain lawns are more likely to get crabgrass, including those in full sun, areas where the soil has been compacted by heavy traffic, and in lawns that are sparse.
In lawn care, thatch is a layer of organic matter that accumulates on a lawn around the base of the grass plants. Thatch is a combination of living and dead plant matter including crowns, stolons, rhizomes, and roots. Grass clippings do not generally contribute to thatch buildup as they can be easily broken down by soil microorganisms.
In the wild, Eriophorum angustifolium is a creeping rhizomatous perennial sedge, [3] with an abundance of unbranched, translucent pink roots. [4] Fully grown, it has a tall, erect stem shaped like a narrow cylinder or triangular prism; it is smooth in texture and green in colour.
Root-knot nematode females lay eggs into a gelatinous matrix produced by six rectal glands and secreted before and during egg laying. [19] The matrix initially forms a canal through the outer layers of root tissue and later surrounds the eggs, providing a barrier to water loss by maintaining a high moisture level around the eggs. [ 20 ]
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Root nodule formation in these plants saves the world economy $10 billion in synthetic nitrogen fertilizer every year. [ 76 ] On the other side, pesticides have some direct harmful effect on plant including poor root hair development, shoot yellowing and reduced plant growth.
Phasmatodea eggs resemble seeds in shape and size and have hard shells. They have a lid-like structure called an operculum at the anterior pole, from which the nymph emerges during hatching. The eggs vary in the length of time before they hatch which varies from 13 to more than 70 days, with the average around 20 to 30 days. [15]