Rapeseed-Mustard: Optimal Cultivation Practices for High Yields

Rapeseed and mustard are among India’s most vital oilseed crops, ranking second only to soybean in the country’s edible oil production landscape. Together, they account for roughly 36% of India’s total edible oil output and are cultivated across 24 states. With an oil content ranging from 37% to 49%, these crops are a lifeline for millions of farmers – especially in Rajasthan, Uttar Pradesh, Haryana, and Madhya Pradesh. But achieving high yields requires more than just scattering seeds. It calls for smart agronomic decisions at every stage, from selecting the right variety to managing pests at harvest time.

Why rapeseed-mustard matters for Indian agriculture 🔗

India is the third-largest global producer of rapeseed-mustard, contributing approximately 11% to worldwide output. During 2024-25, the crop covered about 8.63 million hectares with a total production of 12.61 million tonnes. Beyond oil extraction, rapeseed-mustard serves multiple purposes – the oil cake works as both animal feed and organic manure, the young leaves are eaten as green vegetables, and mustard oil is even used in the tanning industry for softening leather.

The rapeseed-mustard group in India includes eight species: Indian mustard (Brassica juncea), toria, yellow sarson, brown sarson, gobhi sarson, black mustard, karan rai, and taramira. Among these, Indian mustard dominates in terms of area and production.

Climate and soil requirements 🔗

Rapeseed-mustard is a rabi season crop sown between September-October and harvested by February-March. These crops need cool, dry weather during the growing phase and clear, warm conditions at maturity. The ideal temperature range for growth is 15°C to 25°C, though germination requires around 25°C at the time of sowing.

For soil, well-drained loam soils are the best choice. While the crop can tolerate sandy loam to clay loam conditions, it does not perform well in waterlogged or heavy soils. A neutral soil pH of around 7.0 supports optimal growth and nutrient uptake.

Improved varieties for better yields 🔗

Choosing the right variety is one of the most impactful decisions a farmer can make. Several high-yielding varieties have been developed by institutions like ICAR-IARI, New Delhi and the Directorate of Rapeseed-Mustard Research (DRMR), Bharatpur.

Pusa Mustard 25 (NPJ-112) 🔗

This is an early-maturing variety that takes only about 107 days to reach harvest. It produces an average seed yield of around 14.7 q/ha with an oil content of 39.6%. Its short duration makes it ideal for multiple cropping systems – farmers can fit it between a kharif harvest and the main rabi sowing of wheat or vegetables. It is recommended for Rajasthan, Punjab, Haryana, Delhi, and western Uttar Pradesh.

Pusa Mustard 32 🔗

A more recent release from IARI, Pusa Mustard 32 is a low erucic acid variety (less than 2% erucic acid), which makes the oil healthier for human consumption by international standards. It yields an average of 27.1 q/ha with 38% oil content and matures in about 142 days. This variety shows tolerance to low water stress, making it suitable for areas with limited irrigation access.

Other notable varieties 🔗

Farmers should also consider Pusa Bold (a bold-seeded variety yielding 20-25 q/ha with 42% oil content), Varuna (a widely grown variety known for adaptability), and Pusa Vijay (tolerant to high temperature and salinity, yielding about 25 q/ha). Hybrid options like Coral PAC 432 are also available from private seed companies and offer competitive yields. The choice of variety should align with local agro-climatic conditions, sowing time, and whether cultivation is rainfed or irrigated.

Land preparation and sowing 🔗

A clean, well-pulverised seedbed is essential for good germination. The field should be ploughed deep once, followed by 2-3 cross harrowings with planking after each pass. All stubble and weeds must be removed before sowing.

Seed rate and spacing 🔗

The recommended seed rate is 4-5 kg per hectare for mustard (Indian mustard/rai), while toria requires slightly less. Seeds should be sown in rows with 30 cm row-to-row spacing for toria and 45 cm for mustard, maintaining a plant-to-plant distance of 10-15 cm. Thinning is done about three weeks after sowing. Line sowing using seed drills gives better yields compared to broadcasting, as it ensures uniform plant population and easier intercultural operations.

Sowing time 🔗

Timely sowing is critical. Toria should be sown from mid to late September, while mustard (rai and sarson) should ideally be sown in the first fortnight of October. Late sowing pushes the crop into warmer temperatures during the reproductive phase, which reduces both seed set and oil content.

Seed treatment 🔗

Before sowing, treat seeds with metalaxyl (Apron 35 SD) at 6 g/kg of seed to protect against white rust and downy mildew. Additionally, treating seeds with Trichoderma harzianum at 10 g/kg seed helps manage soil-borne pathogens and promotes early root development.

Nutrient management 🔗

Rapeseed-mustard is highly responsive to balanced fertilization, and nitrogen is the most critical nutrient for this crop.

Recommended fertilizer doses 🔗

For irrigated conditions, apply N:P:K at 80:40:40 kg/ha. Under rainfed conditions, a reduced dose of 50:25:25 kg/ha is recommended. Additionally, sulphur application at 40 kg/ha is important because mustard is a sulphur-loving crop – it improves both oil content and seed quality. Application of 25 kg/ha zinc sulphate and 10 kg/ha borax further boosts yield.

Half the nitrogen should be applied as a basal dose at sowing, with the remaining half top-dressed 30-45 days after sowing, coinciding with the first irrigation. Phosphorus and potassium are applied entirely as basal doses. For organic inputs, incorporating 7-10 tonnes of FYM or well-decomposed compost per hectare before sowing improves soil structure and moisture retention.

Research from a recent study published in Scientific Reports confirmed that combining sulphur application with mulching and ridge sowing significantly enhanced mustard growth characteristics including plant height, branching, and overall yield.

Water management 🔗

Mustard is relatively drought-tolerant, but well-timed irrigation can dramatically boost yields. The crop generally requires 2-3 irrigations during its lifecycle:

First irrigation – at the branching stage, approximately 30 days after sowing (DAS). Second irrigation – at the pod formation stage, around 60-65 DAS. This is the most critical stage for higher yield. A third irrigation may be given at the seed filling stage if moisture is insufficient. One important precaution: avoid irrigating during peak flowering (typically late December to mid-January), as excess moisture during this period can increase the incidence of stem rot disease.

Under rainfed conditions, moisture conservation techniques like mulching and ridge-furrow sowing help retain soil moisture and improve crop stand.

Weed management 🔗

Weeds can cause 20-30% yield losses in rapeseed-mustard if left unmanaged. Common weeds include Chenopodium album (bathua), Melilotus indica (senji), and Cyperus rotundus (motha).

For chemical weed control, a pre-emergence spray of pendimethalin 30 EC at 1.0 kg a.i./ha within 2-3 days of sowing effectively controls many annual grasses and some broadleaf weeds. Alternatively, clodinofop 15 WP at 0.06 kg a.i./ha applied at 25-30 DAS can manage grassy weeds. Under rainfed conditions, one hand weeding at 25 DAS usually suffices, while irrigated fields benefit from two hand weedings between 25-40 DAS.

Pest management 🔗

Several pests can significantly reduce mustard yields if not monitored and controlled in time.

Mustard aphid (Lipaphis erysimi) 🔗

This is the most damaging pest of rapeseed-mustard in India. Both nymphs and adults suck sap from tender leaves, stems, and pods, causing curling, wilting, and stunted growth. Research from ICAR-DRMR shows that aphid infestation can reduce seed yield by up to 86% in severe cases. Aphid populations thrive in cold, cloudy weather – which is why early sowing helps avoid peak infestation periods.

Control measures: Spray thiamethoxam 25 WG at 0.2 g/litre or imidacloprid 17.8% SL at 0.3 ml/litre of water when aphid colonies are first noticed. As a biological alternative, neem oil at 2% or neem seed kernel extract (NSKE) at 5% can reduce aphid populations by up to 80%. Encouraging natural predators like ladybird beetles (Coccinella septempunctata) also forms part of eco-friendly integrated pest management.

Mustard sawfly 🔗

The sawfly larvae feed on leaves during October-November, sometimes stripping the entire leaf lamina and leaving only midribs. This pest typically disappears with the onset of winter. Early sowing and timely insecticide application help keep infestations in check.

Painted bug (Bagrada hilaris) 🔗

This pest attacks seedlings and can destroy young plants. Seed treatment with imidacloprid 70 WS at 5 g/kg of seed provides protection for the first 30-35 days after sowing.

Disease management 🔗

White rust 🔗

Caused by Albugo candida, white rust is one of the most serious diseases of rapeseed-mustard. It appears as shiny white to creamy pustules on the undersides of leaves and can cause characteristic “staghead” deformation of the inflorescence. Yield losses can range from 17% to as high as 89% in severe infections.

Management: Use resistant varieties like Bio-902. Apply metalaxyl-based seed treatment before sowing. For foliar control, spray metalaxyl + mancozeb (Ridomil MZ) at 50, 65, and 80 DAS. Copper oxychloride 50% WP at 3 g/litre is another effective option.

Alternaria blight 🔗

Caused by Alternaria brassicae, this disease produces dark, concentric spots on leaves, stems, and pods. Infected pods contain shrivelled, undersized seeds. Maintaining proper crop spacing to promote airflow and applying fungicides like iprodione 50% WP at 4-5 g/litre at the first sign of symptoms helps control the spread.

Downy mildew 🔗

Often appearing alongside white rust, downy mildew (Hyaloperonospora parasitica) shows as yellow spots on the upper leaf surface with a white fungal growth underneath. Severely affected inflorescences become malformed and fail to produce pods. Metalaxyl-based sprays effective against white rust also help manage downy mildew.

Harvesting and yield expectations 🔗

Harvest when pods turn yellowish-brown and seeds inside become hard. Since the crop is prone to shattering – especially mustard and toria varieties – harvesting should be done just before pods fully open, preferably in the morning hours when humidity is higher and shattering losses are minimal.

After cutting, the harvested plants should be stacked on the threshing floor for 5-6 days before threshing. The cleaned seeds need sun drying for 4-5 days until the moisture content drops to about 8%. With improved varieties, good agronomic management, and proper plant protection measures, farmers can expect yields of 14-20 quintals per hectare for rapeseed and 20-25 quintals per hectare for mustard.

Cropping systems and intercropping 🔗

Rapeseed-mustard fits well into diverse cropping systems. Common rotations include bajra-mustard, rice-mustard, and cotton-mustard sequences. The crop should not be grown in the same field for consecutive years to break disease and pest cycles.

Intercropping with wheat, barley, gram, and lentil under rainfed conditions or with potato under irrigated conditions is widely practised. Research from ICAR indicates that adopting improved cropping sequences like cluster bean-mustard or pearl millet-mustard can improve total system productivity by up to 64% compared to the traditional fallow-mustard system.

Key takeaways for maximising mustard yield 🔗

Successful rapeseed-mustard cultivation depends on getting several factors right together: choosing an improved variety suited to your region and sowing window, ensuring timely sowing in the first half of October, applying balanced nutrition with special attention to nitrogen and sulphur, providing 2-3 well-timed irrigations, managing weeds early, and staying vigilant against aphids and white rust. Each of these factors individually may seem small, but together they can bridge the significant gap between India’s current average yield of about 1,461 kg/ha and the attainable yield of 2,500-3,000 kg/ha.

What do you think? Given that India’s average mustard yield is still well below its potential, which agronomic practice do you believe could make the biggest difference for smallholder farmers – access to improved seed varieties, better irrigation scheduling, or more effective pest management?

References

1. https://epubs.icar.org.in/index.php/JOB/article/view/172304
2. https://www.frontiersin.org/journals/agronomy/articles/10.3389/fagro.2025.1570033/full
3. https://www.khethari.com/blogs/news/rapeseed-and-mustard-cultivation-practices
4. https://rkb-odisha.in/oilseed-crops-in-odisha/mustard/
5. https://ztmbpd.iari.res.in/technologies/varietieshybrids/oil-seeds/mustard/
6. https://www.drmr.res.in/technologies_developed.php
7. https://www.nature.com/articles/s41598-025-95313-2
8. https://aatcc.peerjournals.net/wp-content/uploads/2025/02/Management-of-white-rust-Albugo-candida-of-mustard-through-chemical-measures.pdf