Weed Science Lecture Quizes

what are direct losses due to weeds? name an example.

1. reduction in harvestable crops due to weeds

2. example: weeds in strawberry rows

what is an indirect losses due due to weeds? name some examples/specific complications.

1. secondary impact of weeds on crop quality, animal health, precluded grazing, reduced quality of life for pets, harboring pests, hazards to humans, and reduce aesthetic value.

2. Specific example: golf green with weeds, reduce value of a home, bad weight gain for an animal = less money

what is competition and how do weeds do this to crops?

1. competitions is crops competing for nutrients, water, and sunlight

2. if a weed is competing with a crop for resources, they can take up more room and resources, killing or reducing the crop

what are the methods of weed classification? (4) and give examples of each

1. life cycle (annual, biennial, perennial)

2. type of plant (dicot/monocot)

3. taxonomy (what other plants a weed is related to)

4. habitat (terrestrial/aquatic)

what is the difference between grasses and sedges?

what is allelopathy and how can you help reduce this?

1. chemical interference of one organism with another (ex. black walnut tree)

2. using cover crops can help w/ crop production

what is parasitism?

a plant that uses a host plant’s vascular tissue to sustain itself (ex. dodder, mistletoe)