Which variety of Flat beans are resistant to Jassids and fruit borers?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Pusa Sem 2
Option (3) Pusa Sem 2 — Correct. Pusa Sem 2 (and Pusa Sem 3) is the flat bean variety bred for resistance to jassids, aphids and fruit borer. NCERT lists it in the table of insect-resistant varieties.
Note: This question is from Chapter 9, Strategies for Enhancement in Food Production, of the pre-rationalised NCERT book. This chapter is not in the present NCERT book (2026-27). The extract below is from the pre-rationalised edition.
NCERT Extract (Pre-rationalised edition, Chapter 9, Strategies for Enhancement in Food Production):
Plant Breeding for Developing Resistance to Insect Pests – “… Breeding methods for insect pest resistance involve the same steps as those for any other agronomic trait such as yield or quality and are as discussed earlier. Sources of resistance genes may be cultivated varieties, germplasm collections of the crop or wild relatives. Some released crop varieties bred by hybridisation and selection, for insect pest resistance are given in Table 9.2.”
Table 9.2
| Crop | Variety | Insect Pests |
|---|---|---|
| Brassica (rapeseed mustard) | Pusa Gaurav | Aphids |
| Flat bean | Pusa Sem 2, Pusa Sem 3 | Jassids, aphids and fruit borer |
| Okra (Bhindi) | Pusa Sawani Pusa A-4 | Shoot and Fruit borer |