FREE CPP Plant Health & Disease Management Questions and Answers

Question 1

What is the first step in diagnosing a plant disease?

Accepted Answer

Identify the plant

Answer

The first crucial step in diagnosing a plant disease is to accurately identify the plant species. Different plants have varying susceptibilities to specific diseases and pests, and similar symptoms can have different causes across species. Knowing the plant allows for targeted research into common issues for that specific species, significantly narrowing down potential diagnoses and leading to effective treatment.

Question 2

Which pathogen is responsible for powdery mildew?

Accepted Answer

Fungus

Answer

Powdery mildew is a common plant disease caused by various species of fungi, particularly those in the order Erysiphales. It manifests as distinctive white, powdery spots or patches on the surface of leaves, stems, and flowers. These fungi thrive in moderate temperatures and high humidity, spreading through spores carried by wind to infect new plants.

Question 3

Which deficiency causes yellowing between leaf veins (chlorosis)?

Accepted Answer

Iron

Answer

Iron deficiency, also known as iron chlorosis, typically causes interveinal yellowing (chlorosis) in young leaves, meaning the tissue between the veins turns yellow while the veins themselves remain green. This occurs because iron is an essential micronutrient for chlorophyll production, which gives leaves their green color. Other nutrient deficiencies may cause different patterns of yellowing or affect older leaves first.

Question 4

Which practice helps prevent the spread of soil-borne diseases?

Accepted Answer

Crop rotation

Answer

Crop rotation is an effective agricultural practice for preventing the spread of soil-borne diseases. By alternating the types of crops grown in a specific area over successive seasons, it disrupts the life cycles of pathogens and pests that are specific to certain plants. This reduces the buildup of disease-causing organisms in the soil, promoting healthier crops and reducing the need for chemical treatments.

Question 5

What is the main cause of root rot in plants?

Accepted Answer

Overwatering

Answer

Overwatering is the primary cause of root rot because it saturates the soil, displacing oxygen essential for root respiration. This anaerobic environment creates ideal conditions for harmful fungi and bacteria to thrive. These pathogens then attack and decay the roots, leading to the plant's inability to absorb water and nutrients.

CPP - Certified Plant Professional Practice Test

CPP - Certified Plant Professional Practice Test

FREE CPP Plant Health & Disease Management Questions and Answers