Crop Protection - Diseases

The video discusses the devastating impact of the potato blight in Ireland in 1845, which led to mass starvation and emigration. It explains the types of plant diseases, distinguishing between parasitic and non-parasitic diseases. Parasitic diseases are caused by fungi, bacteria, and viruses, each affecting plants differently. The video also covers how these parasites spread through air, water, and soil, and the methods farmers use to control them, including chemical treatments and cultural practices like crop rotation and intercropping.

What was the primary cause of the Irish famine in 1845?

• A severe drought

• A potato blight caused by a fungus

• A sudden drop in temperature

• An invasion of locusts

Which of the following is NOT a non-parasitic plant disease cause?

• Waterlogging

• Fungal infection

• Lack of nutrients

• Excessive heat

How do fungi typically spread among plants?

• Via insect carriers

• Through direct contact with roots

• By wind dispersal of spores

• Through seeds

What is a common sign of viral infection in plants?

• Sudden wilting

• White powdery substance on leaves

• Yellowing of the entire plant

• Ring-like markings on leaves

Which medium is NOT a common way for parasites to spread?

• Water

• Soil

• Air

• Fire

What is the purpose of crop rotation?

• To confuse parasites and prevent crop-specific diseases

• To reduce the need for pesticides

• To maximize the use of available land

• To increase soil fertility

Why might farmers choose cultural methods over chemical treatments?

• Chemical treatments are more effective

• Cultural methods are more expensive

• Chemical treatments are easier to apply

• Cultural methods are safer for the environment and health