Disease Control
Muhtasari
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.
Malengo
- (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.
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Disease Control. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- 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
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Disease Control? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
Pakua Programu Kwenye Google Playstore
Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
