Cannabis Pest Management Midterm Review

Three conditions necessary for plant disease

1. Favorable conditions for the disease

2. Susceptible host

3. Pathogen presence

Four IPM control measures

1. Chemical

2. Biological

3. Mechanical

4. Cultural

True or false

Hydrogen peroxide has a strong oxidizing action and should not be mixed with other pesticides and fertilizers.

True

Low humidity effects:

Leaf stress

Low VPD effects

Plant to transpire too slowly

High humidity effects

Mold

High VPD effects

Plant to transpire too quickly

Definition of action threshold

A pest or damage level at which control is initiated to avoid significant damage or loss of property

When should you avoid reusing containers

If the previous crop had a disease problem

What sentence describes relative humidity?

Expressed in percentage, and it measures the current absolute humidity relative to the maximum humidity for that temperature.

Why is vapor pressure deficit important to controlling pest and disease?

It controls transpiration which is responsible for humidity, and humidity encourages some diseases.

As temperature decreases, relative humidity

increases

Why is reflecting UV and blue light upward from the base of the media a successful pest management technique?

It confuses pest so they continue flying.

What can be used to repel slugs and snails with an electric shock?

Copper

Screens can be very helpful in keeping pests off of plants, but it blocks out light by approximately how much?

10%-15%

What is vacuuming good for in pest control?

To make it easier to completely exterminate pests using other methods

What can be used to create an alkaline surface that crawling insects want to avoid and prevents fungal disease?

Potassium bicarbonate

What do we call tiny silicon crystals made from shells that when applied to a surface, fatally injure and kill soft-bodied insects?

Diatomaceous earth

What is NOT a mechanism of biological controls?

Barrier

Which Bacillus thuringiensis targets fungus gnats?

Bacillus thuringiensis israelensis

When is the best time to apply mycorrhizal fungi?

At the beginning of the grow cycle

Which statement is NOT correct about biological controls?

Works quickly

Name 4 factors in the design of your growing area that will help in preventing diseases and pests?

1. proper spacing between plants,

2. good air circulation,

3. soil health,

4. and crop rotation.