Which of the following can be controlled by using biopesticides?
Insects
Diseases
Weeds
All of these
D.
All of these
Biopesticides are pesticides of biological origin, which may be of various types depending upon the types of pests killed or controlled by them, e.g., algicides, fungicides, bacteriocides, herbicides or weedicides, insecticides, nematicides and rodenticides, etc. These were initially employed to protect crop plants against pests but they are non-equally important for destroying or controlling vectors for various animals and human pathogens, thus, can be used for controlling various diseases also.
Which one of the following is linked to the discovery of bordeaux mixture as a popular fungicide?
Bacterial leaf blight of rice
Downy mildew of grapes
Loose smut of wheat
Black rust of wheat
Match the following columns and choose the correct option.
| Column I | Column II |
| A. Mutation Breeding | 1. The laborious and expensive process to obtain gene variation. |
| B. Selection | 2. Hybrid vigour can be maintained for several generations |
| C. Hybridisation | 3. Simplest and easiest method of plant improvement. |
| D. Introduction | Oldest breeding method |
| A quick method to obtain gene variation |
A-5, B-4, C-1, D-2
A-5, B-4, C-1, D-3
A-4, B-2, C-3, D-1
A-1, B-2, C-4, D-5
Parbhani Kranti, a variety of bhindi (lady finger) is resistant to
Bacterial Occurs
Yellow mosaic virus
Germinal layers form
Villi form
The plant whose seeds are known to leave the longest viability period is
Carica papaya
Triticum aestivum
Zizypus mauritiana
Nelumbo nucifera
The world’s highly prized wool yielding ‘Pashmina’ breed is
Sheep
Goat
Goat-sheep cross
Kashmiri sheep-Afghan sheep cross
The phenotypic ratio of trihybrid cross in F2-generation is
27: 9: 9: 9 : 3 : 3 : 3: 1
9 : 3 : 3 : 1
1 : 4 : 6 : 4 : 1
27 : 9 : 3 : 3 : 9 : 1 : 2 : 1
Jut is a
bast fibre from secondary xylem
bast fibre from primary xylem
bast fibre from secondary phloem
bast fibre from primary phloem
