Free Certified Horticulturist Pest and Disease Management Questions and Answers

Question 1

Which of the following is an example of an Integrated Pest Management (IPM) practice?

Accepted Answer

Introducing natural predators to control pests

Answer

Integrated Pest Management (IPM) is a comprehensive approach to pest control that prioritizes long-term prevention and suppression with minimal environmental impact. Introducing natural predators, such as beneficial insects or microorganisms, is a key biological control strategy within IPM. This method targets pests without relying solely on chemical pesticides, aligning with IPM's goal of sustainable pest management.

Question 2

What is the primary sign of powdery mildew infection?

Accepted Answer

White, powdery coating on leaves

Answer

Powdery mildew is a common fungal disease easily identified by its distinctive appearance on plants. The primary sign of infection is a white or grayish powdery coating that forms on the surface of leaves, stems, and sometimes flowers and fruits. This powdery substance is composed of fungal spores and mycelia, making it a clear diagnostic symptom.

Question 3

Which pest is most commonly associated with honeydew production on plants?

Accepted Answer

Aphids

Answer

Aphids are small, sap-sucking insects that feed on plant juices, often found in clusters on new growth or the undersides of leaves. As they feed, they excrete a sticky, sugary waste product called honeydew. This honeydew can then lead to the growth of sooty mold, which is a common secondary sign of an aphid infestation.

Question 4

What is a primary cultural practice to reduce the risk of root rot in plants?

Accepted Answer

Ensuring proper drainage in soil or containers

Answer

Root rot is a destructive plant disease caused by fungi or oomycetes that thrive in waterlogged, oxygen-deprived soil conditions. Ensuring proper drainage in soil or containers is crucial because it prevents excess water from accumulating around the roots. This allows roots to access necessary oxygen and reduces the anaerobic environment favored by root rot pathogens, thereby promoting healthy root development.

Question 5

What type of pest is controlled using Bacillus thuringiensis (Bt)?

Accepted Answer

Caterpillars and larvae

Answer

Bacillus thuringiensis (Bt) is a naturally occurring bacterium widely used as a biological pesticide. It produces protein crystals that are toxic specifically to the larvae of certain insect orders, most notably caterpillars (Lepidoptera) and some beetle larvae, when ingested. Bt is valued for its selective action, as it generally does not harm beneficial insects, humans, or other animals.

CH - Certified Horticulturist Practice Test

CH - Certified Horticulturist Practice Test

Free Certified Horticulturist Pest and Disease Management Questions and Answers