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ENVIS BULLETIN - ENVIS Centre on Himalayan Ecology

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durable, about 5-6 times costlier, required qualified operator, proper maintenance, care andprecauti<strong>on</strong>s while operating.The low and medium-cost greenhouses have wide scope in producti<strong>on</strong> of domestic as well asexport-oriented vegetables. NEH regi<strong>on</strong> recorded highest rainfall in the world. The durati<strong>on</strong> of rainyseas<strong>on</strong> is also wide (April-October). During this period, growing of vegetables such as cabbage,cauliflower, broccoli, tomato, brinjal and French bean in open c<strong>on</strong>diti<strong>on</strong>s is very difficult. Severeattacks of pest and diseases occur due to heavy rains. So, growing of vegetable crops in low costpolyhouse during this period is very profitable. C<strong>on</strong>trol of disease and pest in polyhouse is also easy.Other plant protecti<strong>on</strong> structures1.Plastic low tunnels: Plastic low tunnels are miniature form of greenhouses to protect the plantsfrom rains, winds, low temperature, frost and other vagaries of weather. The low tunnels are verysimple structures requiring very limited skills to maintain are easy to c<strong>on</strong>structs and offer multipleadvantages. For c<strong>on</strong>structi<strong>on</strong> of low tunnels, film of 100 micr<strong>on</strong> would be sufficient. The cost of a100-micr<strong>on</strong> thick film would be about Rs.10/m 2 .2.Net houses: Net houses are used for raising vegetable crops in high rainfall regi<strong>on</strong>s. Roof of thestructure is covered with suitable cladding material. Sides are made of wire mesh of different gauges.Such structures are useful for NEH regi<strong>on</strong>.Approximate cost estimateCost of producti<strong>on</strong> (for <strong>on</strong>e year) for 100 m 2 polyhouse cum rainshelterA) With hired labourCost of labour = Rs. 6400.00Cost of inputs = Rs. 1500.00Cost of structure = Rs. 3000.00Total =Rs. 10900.00B) With 50% hired + 50% family labourCost of labour = Rs. 3200.00Cost of inputs = Rs. 1500.00Cost of structure = Rs. 3000.00Total =Rs. 7700.00C) With family labour <strong>on</strong>lyCost of inputs = Rs. 1500.00Cost of structure = Rs. 3000.00Total =Rs. 4500.00Cropping sequenceCrop Durati<strong>on</strong> Income (Rs.)Tomato Feb- June 6000Spinch beat June-July 1500Tomato Aug.-Nov. 6000Cucumber Nov.-Feb. 6000Total 19500OrTomato Feb- June 6000Spinch beat June-July 1500Capsicum Aug.-Nov. 2250Cucumber Nov.-Feb. 6000Total 1575014E N V IS C entre, G B P IH E D

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