Rapeseed
Scientific Name
Brassica napus
pH
6.5-7.5
Temperature
15° C to 25° C temperature is suitable. For germination slightly high tempratine (27° C) and for growth low temperature is required
Rainfall
areas having 75 to 100cm altitude
Sowing Time
September - October to February - March.
Seed Rate
10-15 Kg/ha
Fertilizer Application
i. Unirrigated: 40kg nitrogen, 20kg phosphate and 20kg potash.
ii. Irrigated: 40kg nitrogen, 30kg phosphate and 40kg potash.
Apply 15 - 20 tonnes of FYM or compost at the time of field preparation.
ii. Irrigated: 40kg nitrogen, 30kg phosphate and 40kg potash.
Apply 15 - 20 tonnes of FYM or compost at the time of field preparation.
Weeds
Chenopo dium album (bathua), Lathyrus spp. (chatrimatri), Melilotus indica (senji), Cirsium arvense (kateli), Fumaria parviflora (gajri) and Cyperus rotundus (motha)
Weeding
Weeding and thinning out should be done after third week of sowing. Another weeding should be done in the 6th week of sowing.
Weed Management
application of Nitrofen at the rate of 1-1.5 kg a.i. per hectare or Isoproturon 1 kg a.i. per hectare in 800-1000 litres of water as pre-emergence spray; Spray 2.2 lit fluchlorolin 45 EC mixed with 800lit of water per hectare. After spraying mix the top soil by hoeing.
Irrigation
Two irrigations at pre - bloom and pod filling stages are beneficial.
Earthing up and Hoeing
hand hoeing and thinning out should be done after third week of sowing
Harvesting Index
As soon as the pods turn yellowish - brown, harvest the crop. The crop is liable to shattering, so no delay harvest.
Post Harvest Activities
The harvested crop should be stacked in threshing floor for - 6 days before threshing. The threshed grain is separated from the husk with the help of slow moving natural air current. Cleaned seed must be dried in the sun for four to five days or till the moisture content comes down to 8 percent.
Marketing
rapeseed is grown for the production of animal feed, edible vegetable oils, and biodiesel
Insect
Mustard Sawfly, Mustard aphid, painted bug, cabbage butterfly.
Malathion 50 E.C. in 700 litres of water per hectare or Dimecron 100 ml per hectare; Use healthy seeds for sowin
Malathion 50 E.C. in 700 litres of water per hectare or Dimecron 100 ml per hectare; Use healthy seeds for sowin
Disease
lternaria Blight, Downy Mildew, White Blister
To control white rust and powdery mildew treat 1kg with 1.5gms metalaxyl, Use seed with high germination (over 90%). Swath badly infected crops early to minimize shattering losses and seed shrinkage due to black spot.
To control white rust and powdery mildew treat 1kg with 1.5gms metalaxyl, Use seed with high germination (over 90%). Swath badly infected crops early to minimize shattering losses and seed shrinkage due to black spot.
Varieties
Morang Tori(Terai and Innar Terai)
Preeti (Irrigated Terai and Inner Terai )
Unnati(Terai, Inner Terai and Irrigated Valley)
Pragati(Terai, Inner Terai & Mid)
Lumle Tori (Mid-High Hill)
Bikash (Terai, Inner Terai)
Recommended Area