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- Subject
- Plant Pathologyagriculture-mcqs › plant-pathology
- Published
- 27 Mar 2019
- Last updated
- 28 May 2026
Explanation
The economic injury level for whitefly is considered to be 1 to 2 nymphs per leaf. This threshold indicates the pest density at which economic damage begins to occur, guiding pest management decisions.
More Plant Pathology MCQs
Practice related questions from the same subject.
- 1.Which organism is responsible for causing late blight disease in potatoes?
- 2.What type of genetic material is essential for a plant virus?
- 3.What term describes the process by which a disease passes from one person to another?
- 4.Which of the following groups includes organisms that can cause diseases?
- 5.Who is recognized as the pioneer and founder of virology?
- 6.What is the common name for Heliothus armigera?
- 7.Haustoria are formed by which of the following?
- 8.Which microorganism is responsible for transforming ammonia into nitrite?