CAZRI Moth Bean Varieties Withstand 35-Day Rainless Spell in Rajasthan, Climate-Resilient Pulses for Arid Agriculture

🗞️ Why in News The ICAR-Central Arid Zone Research Institute (CAZRI) at Jodhpur, Rajasthan, reported in September 2026 that four newly released moth bean (Vigna aconitifolia) varieties, CAZRI Moth-6, 7, 8 and 9, sustained growth and pod development through a 35-day rainless spell during the Kharif 2026 season in western Rajasthan. Two further varieties, CAZRI Moth-10 and 11, are being prepared for release. Targeted breeder seed production of around 23.32 quintals is expected to cover about 10,000 hectares in the coming Kharif cycle.

Moth Bean: The Crop and the Region

Moth bean (Vigna aconitifolia) is a short-duration, deep-rooted, drought-tolerant pulse native to the arid tracts of the Indian subcontinent. It is grown primarily in western Rajasthan, arid parts of Gujarat, Haryana, Punjab, Madhya Pradesh and Karnataka. In Rajasthan, moth bean has historically been the crop of last resort in the Kharif rotation, cultivated on light textured soils on which most other pulses fail.

Moth bean’s agronomic value is disproportionate to its area under cultivation. Its nitrogen-fixing legume nodules improve soil fertility; its deep taproot extracts residual soil moisture; and it produces sizable green biomass that doubles as fodder in a region where fodder scarcity is a recurring stress.

CAZRI: The Nodal Institute

The Central Arid Zone Research Institute (CAZRI) at Jodhpur was established in 1959 by the Ministry of Food and Agriculture, was transferred to the Indian Council of Agricultural Research (ICAR) in 1966, and is India’s premier institute for research in arid and semi-arid agricultural systems. Its mandate covers rainfed agriculture, agroforestry, animal science, integrated farming systems and the socio-economics of dryland livelihoods.

The CAZRI Moth Series

The CAZRI Moth series consists of institute-bred varieties selected for drought tolerance, early duration, resistance to Yellow Mosaic Virus (YMV) and Powdery Mildew, and improved harvest index. The series has been released in stages: Moth-4 and Moth-5 in 2023, Moth-6 and Moth-7 in 2024, and Moth-8 and Moth-9 in 2025. The outcome is of over a decade of breeding, evaluation in multi-location trials and farmer-participatory selection under the All India Coordinated Research Project (AICRP) on Arid Legumes.

CAZRI’s observation from Kharif 2026 is that these varieties maintained pod development through a rainless spell of approximately 35 days, a stress that would have led to widespread crop failure with the older, longer-duration varieties.

Why the Report Matters

The recurrence of long dry spells during the south-west monsoon is one of the clearest local signatures of a warming climate over western India. The India Meteorological Department’s long-term precipitation record shows an increase in the number of dry spells interspersed with high-intensity rainfall events, a pattern that displaces the crop-water balance in arid Rajasthan by weeks.

A pulse variety that can hold pod development through a 35-day rainless spell in-season directly translates into:

One. Food and nutritional security for households in arid Rajasthan, where the pulse is a household staple.

Two. Feed for the small ruminant and camel economy, since moth-bean straw is high-value fodder.

Three. Cash income from the branded Bikaneri bhujia and organised food-processing supply chain that draws heavily on moth-bean flour.

Four. Soil nitrogen through biological nitrogen fixation, which cuts fertiliser demand in a region where inorganic-fertiliser use is comparatively low.

Diagram-in-Words

UPSC Relevance

GS Paper 3. Major crops-cropping patterns in various parts of the country; issues related to direct and indirect farm subsidies; agriculture technology; conservation, environmental pollution and degradation; issues related to intellectual property rights concerning conservation.

A question worth preparing. “Evaluate the role of institute-led crop varietal development in building climate-resilient agriculture in India’s arid regions. Illustrate with reference to recent releases in pulses for the western Rajasthan region. (250 words)”

The Mains framing. Varietal work at institutes such as CAZRI is one of the least visible and most compounding forms of climate adaptation in Indian agriculture. A 35-day rainless spell is no longer an anomaly in Kharif Rajasthan; the difference between a fed household and a distressed one is the presence of a pulse variety whose critical-growth stage is not that fragile. Extension and seed-multiplication are the binding constraints; the science is largely ready.

📌 Facts Corner, Knowledgepedia

Prelims, statement-ready facts:

• Moth bean is Vigna aconitifolia, a Kharif pulse of the family Fabaceae.
• Rajasthan accounts for the largest area and production of moth bean in India.
• The CAZRI Moth series has been released in stages: Moth-6, 7 in 2024; Moth-8, 9 in 2025; Moth-10, 11 in the pipeline for 2026.
• CAZRI, at Jodhpur, was established in 1959 and brought under ICAR in 1966.
• The 2026 report notes that these varieties held pod development through a 35-day rainless spell in Kharif 2026.
• CAZRI’s breeder seed target is about 23.32 quintals, expected to cover about 10,000 hectares.
• Moth bean feeds the Bikaneri bhujia industry, holds soil moisture through deep roots and fixes atmospheric nitrogen.
• The All India Coordinated Research Project (AICRP) on Arid Legumes is the nation-wide platform for moth-bean breeding.
• CAZRI’s regional research stations include Bikaner, Jaisalmer, Pali, Bhuj and Leh.
• ICAR is an autonomous body under the Department of Agricultural Research and Education (DARE), Ministry of Agriculture.

Prelims, the traps:

• Moth bean is Vigna aconitifolia, not Vigna mungo (urad) or Vigna radiata (green gram, moong).
• Mat bean is a common English name for moth bean, not a separate crop; do not confuse.
• CAZRI Moth series is a CAZRI-bred varietal series, not an AICRP location code.
• CAZRI is not the same as NBAGR (National Bureau of Animal Genetic Resources) at Karnal, and not the same as ICAR-IIPR (Indian Institute of Pulses Research) at Kanpur.
• The IIPR at Kanpur is the national pulses institute for the wider country; CAZRI is the arid-zone specialist.

Mains, arguments and keywords:

• Climate-resilient agriculture through varietal development; institute-led plant breeding as adaptation instrument.
• Pulses self-sufficiency: moth bean’s place among the dryland pulses of the Deccan and the arid west.
• Biological nitrogen fixation and soil-fertility gain from legume rotations in low-fertilser regions.
• Seed multiplication and extension as the binding constraint on adoption at scale.
• Keywords: Vigna aconitifolia, CAZRI, ICAR, AICRP Arid Legumes, drought tolerance, breeder seed, harvest index, YMV.

Interview, be ready for:

• “Is India self-sufficient in pulses?” No; India remains a net importer, though the gap has narrowed since the 2015-16 shock. Dryland pulses like moth bean are the low-cost path to closing it.
• “Why is moth bean climate-relevant?” It is one of the few pulses that can hold pod development through in-season dry spells that would kill soybean, tur or urad on the same soil.
• “What is the extension bottleneck?” Certified-seed availability at planting time; a variety releases mean little without breeder seed flowing through foundation and certified layers to reach the farm on the sowing date.

Sources: ICAR-Central Arid Zone Research Institute, Indian Council of Agricultural Research, Ministry of Agriculture and Farmers Welfare, PIB

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