Crop Pests, Damage, Prevention and Control

Question 1

What is the definition of a pest in crop production and horticulture?

Accepted Answer

Any organism that causes damage, disease, or economic loss to crops, livestock, or human property

Question 2

Crop pests are broadly classified into which two main groups based on where they attack crops?

Accepted Answer

Field pests and Store pests

Question 3

Which field pests are insect larvae that tunnel into the stems of cereal crops like maize, millet, and sorghum?

Accepted Answer

Stem Borers

Question 4

Which piercing and sucking insects feed on plant sap, causing leaves to curl, and are known to transmit viral diseases?

Accepted Answer

Aphids and Whiteflies

Question 5

What is the primary damage caused by Cotton Stainers on cotton crops?

Accepted Answer

They pierce cotton bolls to suck sap, leaving stains that ruin lint quality

Question 6

Which of the following field pests are mammals that dig up planted seeds, chew through cassava tubers, or cut down mature cereal stalks?

Accepted Answer

Rodents (such as Grasscutters and Rats)

Question 7

Which bird species is specifically noted as a major field pest that feeds on mature grains of rice, millet, and sorghum directly from the standing crop?

Accepted Answer

Quelea birds

Question 8

Which store pests are small beetles that bore into dry grains and seeds, leaving hollow shells and powdery residue?

Accepted Answer

Weevils

Question 9

Which store pests are known to infest processed crop products like flour, semolina, and yam flour?

Accepted Answer

Flour Beetles

Question 10

How do store pests like weevils affect the viability of seeds intended for planting?

Accepted Answer

They eat the embryo (germ) of stored seeds, causing them to lose their ability to germinate

Question 11

What is the primary consequence of biting and chewing pests, such as grasshoppers and caterpillars, feeding on plant leaves?

Accepted Answer

It reduces the photosynthetic area of the plant

Question 12

Which mode of damage is characterized by pests using needle-like mouthparts to extract liquid sap, leading to wilting and leaf curling?

Accepted Answer

Piercing and Sucking

Question 13

How do rodents and yam beetles in storage facilities create entry points for rot-causing microorganisms?

Accepted Answer

By chewing holes into stored yam and cassava tubers

Question 14

Which pest control category involves standard farming practices like crop rotation, timely planting, and farm sanitation?

Accepted Answer

Cultural control

Question 15

What is the primary mechanism of hermetic storage in physical pest control?

Accepted Answer

It suffocates insects by depriving them of oxygen in airtight containers

Question 16

Which of the following is an example of biological pest control?

Accepted Answer

Releasing ladybird beetles to feed on aphids

Question 17

What type of chemical control involves using toxic gases to treat stored grains in airtight silos to kill all stages of store pests?

Accepted Answer

Fumigants

Question 18

In field crop monitoring, what does the physical sign of 'dead hearts' in cereals indicate?

Accepted Answer

Stem borer damage inside the stem

Question 19

To prevent store pest activity and mould growth, grains should be dried thoroughly to a safe moisture content of usually below what percentage?

Accepted Answer

$ 12\% $

Question 20

Why is it important to seal all cracks and crevices in the walls and floor with cement during storage preparation?

Accepted Answer

To eliminate hiding places for weevils and entry points for rodents

Strong work.

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