... .5cm,full stand ventilation time after the lower humidity, weed control, disease prevention, nurturing seedlings. 2, rational close planting. Suza ... appropriate to create a better plant type.6, the timely pest control. Seedling bud stage focus aphids, red spider bugs Xiang ... cotton bollworm, pink bollworm, such as base, to achieve control targets, also drug prevention. In short the use of cultivation ...