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28 Cards in this Set
- Front
- Back
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A weed having 94,000 seeds per gram of production capacity |
Cyperus difformis Flat flower umbrella plant |
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Paspalum distichum (Knot grass) Asexual propagule |
Rhizome |
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Scirpus maritimus ( Bulrush) |
Tuber |
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Capable of forming contractile roots during extreme dry conditions and shoot growth is arrested. |
Digitaria sanguinalis Large Crabgrass |
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Stem of grasses and sedges |
Culm |
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Basal part of the leaf that clasps the culm. |
Leaf sheath |
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Upper part of the leaf that expresses parallel venation in grasses. |
Blade |
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Hair membranous outgrowth in grasses between leaf blade and leaf sheath. |
Ligule |
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Required weed-free period of corn |
0 to 42 days after planting |
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Critical period of competition |
25 to 33% of crop growth |
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Period when the plant is very sensitive to weed competition. |
Critical Period of Competition |
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Have structures like spines and hooks that allow this weed to cling to fur or hides of animals and clothes of man. |
Bidens pilosa |
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Interrow cultivation which is moving the soil away from the soil. |
Off-barring |
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Moving the soil towards the plant. |
Hilling-up |
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Allowing weeds to emerge during 1 to 2 weeks after harvest then killed using cultivation. |
Stale Seedbed Technique |
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% of GMO crops planted having herbicide resistance gene |
80% |
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Example of a post-emergence pesticide |
2,4-D |
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Example of a pre-emergence herbicide. |
Butachlor |
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Example of a foliar herbicide applied before planting. |
Glyphosate |
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A pre-plant herbicide incorporated in the soil to control R. cochinchinensis which. |
Pendimethalin |
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Two examples of systemic/translocated herbicides. |
Glyphosate and 2,4-D |
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Example of a contact herbicide. |
Paraquat Propanil |
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Non-selective herbicides (2) |
Paraquat and Glyphosate |
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Selective herbicide (1) |
2, 4-D Propanil |
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Contact and Selective |
Propanil |
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Systemic and non selective |
Glyphosate |
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Process of determining and adjusting the sprayer output based on the recommendation. |
Calibration |
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Father of Allelopathy |
H. Molisch |
