Module 4

Question 1

are those pests that are introduced from outside the locality.

Answer 1

Exotic Pest

Question 2

are those pest that are local in origin

Answer 2

Endemic Pest

Question 3

are serious, perennially occurring persistent species that requires control measures to be taken regularly because in the absence of control they frequently occur at above economic injury thresholds.

Answer 3

Key or Major Pest (exotic pest)

Question 4

are usually endemic species that are always found in the field at a low population.
- they do not cause
economic damage because their
populations are being controlled by many natural enemies.

Answer 4

Potential or Minor pest (endemic)

Question 5

are usually strong fliers that can migrate from one place to another.

Answer 5

Occasional Pest

Question 6

What are the Pest based on Abundance

Answer 6

Key or Major Pest
Potential Pest or Minor Pest
Occasional Pest

Question 7

Example of pest that are under on Key or Major pest control?

Answer 7

Rice stemborers, corn borer, green leafhopper (Nephotettix spp.), diamond back moth, Pink stemborer (Sesamia inferens

Question 8

Example of pest that are under on Potential pest ?

Answer 8

Rice whorl maggot or hydrella philippina

Question 9

PESTS ARE OFTEN CLASSIFIED BY THE TYPE OF INJURY THAT THEY CAUSE

Answer 9

Direct pest
Indirect pest

Question 10

occurs when the insect pest causes visible harm to the host organism.

Answer 10

Direct Pest

Question 11

transmit plant, animal and human diseases.

Answer 11

Indirect Pest

Question 12

The effect that the pest has on the crop or commodity.

Answer 12

Injury

Question 13

The effect that injury has on man’s valuation of that crop or commodity.

Answer 13

Damage

Question 14

CLASSIFICATION OF INSECT BASED ON FEEDING HABIT

Answer 14

Monophagous
Oligophagous
Polyphagous

Question 15

feeds on single species of plant

Answer 15

Monophagous

Question 16

feeds to one taxonomic/family of plants

Answer 16

Oligophagous

Question 17

feeds on variety of crops

Answer 17

Polyphagous

Question 18

DEVELOPMENT OF PEST STATUS

Answer 18

> unlimited supply of susceptible host
Favorable condition for growth
Changing biological pressure
Weed reserved in the field

Question 19

WHY DO WE HAVE PEST??

Answer 19

• Because there are some purpose for them
• Agriculture aim to produce food and there are some destroying your aim and that is pest
• Balance ecosystem

Question 20

also called action threshold which indicate the number of insect pest (density or intensity) that should trigger management activity to prevent from reaching EIL.

Answer 20

ECONOMIC THRESHOLD LEVEL

Question 21

_______ is defined in terms of population density, it actually represents the time for instigation of control measures.

Answer 21

ECONOMIC THRESHOLD LEVEL

Question 22

level of pests population at which control measures are employed to prevent the population from exceeding the EIL.

Answer 22

ECONOMIC THRESHOLD LEVEL

Question 23

Pest density at which the loss caused by the pest equals in value the cost of available control measures

Answer 23

ECONOMIC INJURY LEVEL

Question 24

•Lowest population density that will cause economic damage (amt. of damage whose value is greater than the cost of controlling pest)

Answer 24

ECONOMIC INJURY LEVEL

Question 25

Usually expressed as the number of insects per unit area or per sampling unit

Answer 25

ECONOMIC INJURY LEVEL

Question 26

•Tells the maximum number of pests the crop could tolerate but it does not tell when to do something about the problem

Answer 26

ECONOMIC INJURY LEVEL

Question 27

occur when the value of damage is greater than the cost of controlling the pests

Answer 27

Economic Damage

Question 28

The average density of a population over a period of time in the absence of permanent environmental change.

Answer 28

General Equilibrium Position