Disease Control
Bayani Gaba-gaba
Crop diseases are caused by tiny living things you cannot see without a microscope: bacteria, fungi and viruses. A single infected plant left in a field can become the source that spreads disease to a whole crop, turning a healthy harvest into a failure. Knowing what causes a disease, how it gets into the plant and how it spreads is the key to stopping it.
In this lesson you will study one named disease from each group: a bacterial disease, a fungal disease and a viral disease. For each you will learn how it infects the plant, the harm it does, and how it can be prevented and controlled. You will also meet the idea of the disease triangle, which explains why removing any one of three things, the pathogen, a susceptible crop or the right conditions, can stop a disease in its tracks.
Manufura
- (a) describe the mode of infection, harmful effects, prevention and control of one named plant disease from each of the following groups: • bacterial diseases • fungal diseases • viral diseases.
Takardar Darasi
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Nazarin Darasi
Barka da kammala darasi akan Disease Control. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which conditions are most likely to encourage fungal diseases? A. Dry and cool B. Dry and warm C. Wet and cool D. Wet and warm Answer: D
- Maize streak virus is spread from plant to plant by: A. Rain splash B. Leafhoppers C. The wind alone D. Contaminated tools Answer: B
- Cassava bacterial blight is caused by a: A. Virus B. Fungus C. Bacterium D. Nematode Answer: C
- The most effective way to control a viral disease of a crop is usually to: A. Spray a fungicide B. Grow resistant varieties and control the insect carrier C. Add more fertiliser D. Water the crop more often Answer: B
- Which practice helps control a fungal disease by keeping the crop drier? A. Closer spacing of plants B. Flooding the field C. Wider spacing and good drainage D. Leaving infected plants in place Answer: C
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
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Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Disease Control? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
