1. Name a disease of plant in which fine webbing occurs on undersides of the leaves?
- Spider Mites
- Anthracnose
- Mealybugs
- Rhizoctonia
Answer: Spider Mites
2. What primary cause causes the stomata holes of plant leaves to open and close?
- Water availability in the soil
- Guard cell swelling and shrinking
- Photosynthesis rates
- Presence of sunlight
Answer: Guard cell swelling and shrinking
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3. Name the disease of plant in which large yellow spot appears on the leaves?
- Bacterial Blight
- Bacterial Spot
- Aphids
- Botrytis
Answer: Bacterial Blight
4. Bacterial blight of Rice disease of plant is caused due to which bacteria?
- Pseudomonas bacteria
- Xanthomonas citri bacteria
- Xanthomonas oryzae bacteria
- None of the above
Answer: Xanthomonas oryzae bacteria
5. Yellow leaf of citrus is caused due to
- Copper deficiency
- Boron deficiency
- Molybdenum deficiency
- Calcium deficiency
Answer: Molybdenum deficiency
6. Which of the following is NOT an autoimmune disease?
- Filariasis
- Hashimoto's thyroiditis
- Psoriasis
- More than one of the above
Answer: Filariasis
7. Which disease of plant is known as ring disease?
- Citrus Canker
- Black arm of cotton
- Wilt of Potato
- None of the above
Answer: Wilt of Potato
8. In which disease of plant white mildew appears typically on underside of leaves?
- Cylindrocladium
- Angular leaf Spot
- Downy Mildew
- Black arm of Cotton
Answer: Downy Mildew
9. In which disease of plant stem rot at soil line with brown to red lesions?
- Rhizoctonia
- Angular leaf Spot
- Bacterial Blight
- Bacterial Spot
Answer: Rhizoctonia
10. The disease related with apple is known as:
- red rust disease
- tikka disease
- green ear disease
- fire blight
Answer: fire blight
11. Bunchy top of banana plant disease is caused due to:
- Bacteria
- Fungus
- Virus
- None of the above
Answer: Virus
12. Partial wilting and loss of turgidity are deficiency symptoms of
- Chlorine
- Nitrogen
- Molybdenum
- Potassium
Answer: Chlorine
13. Name a disease of plant in which dark to light brown rot forms around wounded plant tissue?
- Gray Mold
- Citrus Canker
- Spider Mites
- None of the above
Answer: Gray Mold
14. In which of the following disease of plants chlorophyll of the leaves get destroyed and leaves get strinked ?
- Mosaic disease of Tobacco
- Tundu disease of Wheat
- Citrus Canker
- More than one of the above
Answer: Mosaic disease of Tobacco
15. In which of the following diseases of plant chlorophyll of the leaves get destroyed and leaves get shrinked?
- Mosaic disease of tobacco
- Citrus Canker
- Tundu disease of wheat
- Rhizoctonia
Answer: Mosaic disease of tobacco
16. Name the disease of plant in which leaves, branches, fruits all are affected?
- Spider Mites
- Mealybugs
- Aphids
- Citrus Canker
Answer: Citrus Canker
