5 pts 4. Certified disease-free, virus indexed plants and rootstocks are used. 5 pts 5. Disease resistant cultivars are selected, when possible and appropriate. If irrigation is supplied to the plants, a water use plan that minimizes disease development, optimizes water-use efficiency and minimizes erosion and runoff is used.
Cultural practices are of value in management of nutrients, weeds, diseases, or insects.
The goals of a sound fertility program are to supply adequate nutrients with optimum timing for maximum economical crop yield, while avoiding excesses that can degrade water quality or adversely affect crop or soil quality. A petiole tissue analysis is performed in the current year. 5 pts 2. A soil test is conducted for pH and nutrients. 5 pts 3.