Food preparation YamStudy pool, section Y2D

Subelement Y2

YAM CULTIVATION

Section Y2D

Pest and disease management

Y2D01

Which pest causes the most significant yield losses in yam production globally?

A.
Grasshoppers
Correct Answer
B.
Yam nematodes (Scutellonema bradys and others)
C.
Fruit flies
D.
Spider mites

Y2D01

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Y2D02

What is the primary symptom of anthracnose disease in yams?

A.
Yellow tubers
B.
Root galls
Correct Answer
C.
Black leaf spots and dieback
D.
Blue coloration of stems

Y2D02

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Y2D03

Which virus is considered the most damaging to yam crops?

Correct Answer
A.
Yam mosaic virus
B.
Tobacco mosaic virus
C.
Cauliflower mosaic virus
D.
Cucumber mosaic virus

Y2D03

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Y2D04

What is the most effective cultural practice to manage yam beetles?

A.
Midnight harvesting
B.
Playing loud music in fields
C.
Spraying with sugar water
Correct Answer
D.
Crop rotation and field sanitation

Y2D04

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Y2D05

Which storage pest can cause significant post-harvest losses in yam tubers?

A.
Termites
Correct Answer
B.
Yam beetles (Heteroligus spp.)
C.
Fruit flies
D.
Bollworms

Y2D05

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Y2D06

What is the appropriate management approach for yam nematode prevention?

A.
Increasing field moisture
B.
Increasing soil alkalinity
Correct Answer
C.
Using clean planting material and crop rotation
D.
Adding more nitrogen fertilizer

Y2D06

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Y2D07

What caused the "internal brown spot" disease in yams?

Correct Answer
A.
Fungal infection (Botryodiplodia theobromae)
B.
Calcium deficiency
C.
Excessive watering
D.
Exposure to direct sunlight

Y2D07

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Y2D08

Which integrated pest management technique is used for controlling yam diseases?

A.
Calendar-based weekly pesticide application regardless of pest presence
B.
Removing all wildlife from the area
C.
Planting in exactly the same location each year
Correct Answer
D.
Using resistant varieties combined with cultural controls

Y2D08

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Y2D09

What fungi causes tuber rot during yam storage?

A.
Rhizobium species
Correct Answer
B.
Penicillium, Fusarium, and Aspergillus species
C.
Saccharomyces species
D.
Lactobacillus species

Y2D09

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Y2D10

Which of the following is NOT an effective traditional practice for managing yam pests?

A.
Intercropping with pest-repellent plants
B.
Appropriate crop rotation
Correct Answer
C.
Planting during full moon
D.
Using wood ash on planting material

Y2D10

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Y2D11

What is the most environmentally sustainable approach to yam disease management?

Correct Answer
A.
Integrated disease management using resistant varieties and cultural practices
B.
Weekly application of broad-spectrum fungicides
C.
Daily application of insecticides
D.
Complete sterilization of soil before planting

Y2D11

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