The cause of disease: Over-moisture on substrate, soil are mixed in substrate, too low temperature in mushroom greenhouse, too early fruiting, too frequent ventilation, too late earthing.
Control measures: Be sure to avoid too wet compost, strictly prevent soils from entering into the substrate. What’s more, after diverting water, reduce ventilation and keep the relative air humidity at 85%. It is also advisable to cover fine soil on top of thick soil layer when you find mushroom buds are not formed yet.