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Crop Weeds Grass Weed Seedling Key |
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Contents |
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| Introduction |
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| Terminology | ||||
| Ligule Type | ||||
| Blade Type | ||||
| Sheath Type | ||||
| Plant Parts diagram | ||||
| Cereal Grain Collars | ||||
| Grass weed Seedling Key | ||||
| Introduction | |
Identification of grass weed seedlings is critical to their control. Weed species vary in their response to herbicides; therefore it is necessary to select the right herbicide to control a particular species. Controlling weeds in the early stages of growth not only in-creases the effectiveness of control measures, but also reduces crop losses due to weed competition. This key provides an easy and reliable means for identifying grass weed seedlings. To use the key you will need to understand how the key is organized and be able to recognize a few simple characteristics used to identify grass weeds. Grass seedlings must be examined with great care. One characteristic seldom is sufficient to identify the weed. The following steps will help you use the identification key to ensure correct seedling identification.
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| Terminology | |
| Auricles | A pair of claw-like projections at the juncture of the sheath and blade of certain grasses. |
| Blade | The flat, expanded portion of a leaf. |
| Collar | The junction of the leaf blade and leaf sheath. |
| Ligule | An upward-pointing growth (a short membrane or row of hairs) on the inside of the leaf at the junction of the blade and sheath of most grasses. |
| Midrib | The central vein of a leaf. |
| Node | That part of the stem from which leaves or branches arise. Prominent Veins- Veins that protrude conspicuously from the upper blade surface. |
| Sheath | The tubular portion of a grass leaf that encloses the stem. |
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