तुड़ाई, समस्याएँ और ढींगरी का व्यवसाय

01Harvest and flushes

Twist the whole cluster off at the base before the cap edges flatten and curl; a flat cap is shedding spores and tears easily. The DMR folder adds a health rule: open doors and windows two hours before harvesting and wear a mask, because oyster spores cause allergy.

A flush is one wave of mushrooms. The folder says the first flush gives about half or more of the total, the second comes 8-10 days later, and three flushes are worth keeping; then the bags go to a deep pit.

The folder reports 700-800 g fresh mushroom per kg dry straw; the manual states a minimum of 500-700 kg per tonne in 45-60 days. Reports, not promises.

02Packing and shelf life

Fresh oyster keeps 24-48 hours at room temperature, so plan the sale before the pick. The folder's method: spread the mushrooms on a cloth for about two hours so surface water dries, then pack in perforated polythene; in a refrigerator they hold 2-4 days.

The DMR post-harvest bulletin specifies polythene under 100 gauge with holes giving about 5 per cent vent area. TNAU packs 200 g per bag for retail.

If you cannot sell fresh, dry. The manual says dried oyster at 2-4 per cent moisture keeps 3-4 months when sealed. Drying is a second product, not a rescue for spoiled mushrooms.

03Problems you will meet

Match the symptom to the cause before acting. Green mould in bags: poor straw treatment, old spawn or low pH. Long stalks, small caps: high CO2 or low light. Pale yellow caps: light under 100 lux. Brown caps in sajor-caju: temperature above its band. Wet, rotting caps: water left on the surface. Larvae in stalks: flies got in; screen with 35 mesh net, use a light trap, and cover spent bags in the pit with at least 10 cm of manure.

This course gives no spray recipes. Hygiene, air, light and temperature fix most of the above. If a product is used, check current label approval and keep the 48-hour gap between spraying and picking that NHB requires.

04Business: what DMR's numbers are and are not

The DMR folder puts the cost of producing a kilogram of dhingri at 10-15 rupees. It is undated, from the early 2010s, and marked medium confidence. The 2011 manual's model assumes 70 per cent biological efficiency and a sale price of 50 rupees per kg. Use these to learn the shape of a budget, never as today's prices.

Your numbers come from your diary: straw, spawn, polythene, labour and power for one batch; kilograms sold, not picked; the price each buyer actually paid; kilograms thrown away. Divide cost by kilograms sold. The folder itself prints two cycle lengths, 45-60 days in its introduction and 40-50 in its economics, so measure yours.