Question

Read the passage and answer the following questions. 1)Weed seeds exist in almost all lawns and gardens and spread in a number of ways. They can be dispersed by wind, water, animals, soil amendments, poor-quality grass seed, and lawn and garden equipment. Many weed seeds remain dormant for years before they begin to grow since they must reach the soil's surface and receive the proper amount of sunlight and moisture before they germinate . There are a variety of lawn and garden conditions that can discourage desirable plants, increasing the potential for weed development.The best time to attack all weeds is when they are young, tender and actively growing. If a weed has developed seeds, don't add it to a compost pile.Classical biological weed control involves the introduction and management of selected host-specific natural enemies to reduce and suppress problematic weeds. 1. a) List out the various ways of spreading of weeds in lawn. b) Name few weeds and identify the best time to kill them. c) Suggest the method ,in which usage a living organism can kill weeds . Explain with an example. 2)What are the measures adopted to prevent and control the damage of stored food grains? 3)List out some preventive measures used to control pests. 4) How can you segregate the Crop diseases? what are they?

Answer 1

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Answer 2

1. The weeds are dispersed by wind water air animals and soil. garden equipment also help to spread the bid. The seeds of weeds remain dormant for various years before they begin to grow. They require proper amount of sunlight and moisture for their growth

Explanation:

• 2. The best time to attack all week is the time when they are young and they are tender and actively growing.

• 3.There are many ways of prevention of wheat. The classical management is is the introduction of natural enemies that will kill the weed. In addition to this there are many weedicide.

• 4.the crop diseases can be segregated based on the organism that caused it. They are weed caused diseases, viral diseases and bacterial diseases

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