Natural Pest Resistant Plants

Q. Biochemical character which provides resistance to stem borers in Maize is

1. High nitrogen, sugar and aspartic acid content
2. Low aspartic acid, nitrogen and sugar content
3. High nitrogen, sugar and low aspartic acid content
4. High aspartic acid, low nitrogen and sugar content

Q. Which of the following factor(s) is/are responsible for resistance to maize stem borers?

1. High aspartic acid
2. High nitrogen content
3. High sugar content
4. All of the above.

Q. Pest resistance in crop plants may be due to:
I. Physiological characteristics
II. Biochemical characteristics
III. Morphological characteristics

1. I only
2. I and II only
3. I and III only
4. I, II and III

Q. Insect resistance in the host crop plants may due to

1. physiological characteristics only
2. morphological and physiological characteristics only
3. biochemical characteristics only
4. morphological, biochemical and physiological characteristics

Q. Pest resistance in crop plants may be due to:
I. Physiological characteristics
II. Biochemical characteristics
III. Morphological characteristics

Q. Which of the following substances serve as an anti-transpirant in plant?

1. Asprin
2. Silicon oil
3. All of the above
4. Phenyl mercuric acetate

Q. Natural methods of plants to avoid pests include

1. Morphological
2. Biochemical
3. All of the above
4. Physiological

Q.

How are Dahlia plants cultivated?

Q. Which of the following stands for Congress grass?

1. Cynodon (Gramineae)
2. Parthenium (Compositae)
3. Aspidistra (Liliaceae)
4. Candytuft (Cruciferae)

Q. Biochemical character which provides resistance to stem borers in Maize is

1. High nitrogen, sugar and aspartic acid content
2. Low aspartic acid, nitrogen and sugar content
3. High nitrogen, sugar and low aspartic acid content
4. High aspartic acid, low nitrogen and sugar content