经多年的生产实践证明,长春密刺是适于保护地栽培的耐寒、早熟、高产的优良黄瓜品种.但采用露地繁种往往在盛瓜期发生严重的霜霉病,药剂防治不及时,种瓜尚未充分成熟,植株就会完全枯萎,不仅产量低,而且种子质量差;若采用温室繁种,则成本太高,1985年春我们采用塑料小拱棚繁殖长? After many years of production practice, it is proved that Changchongmi is a good cold-resistant, precocious and high-yield cucumber variety suitable for protected cultivation. However, the use of open-field breeding often causes severe downy mildew during the whole growth period and the pesticide is not controlled in time. Melon is not yet fully mature, plants will be completely withered, not only low yield, but poor seed quality; if the use of greenhouse species, the cost is too high, the spring of 1985, we use small plastic shed propagation long?