The cultivar chosen must offer good prospects for economic success with minimal use of agrochemicals.
IP guidelines must set out a list of the relative susceptibilities of the commonly grown cultivars of soft fruits to all important pests and diseases when available.
IP guidelines must state a list of cultivars with the following properties:
i) Strawberry cultivars with resistance to Verticillium wilt and/or powdery mildew,
ii) Raspberry cultivars less susceptible to Phytophthora spp. and/or virus-transmitting aphids,
iii) Blackcurrant cultivars resistant to blackcurrant gall mite and/or reversion disease,
iv) Blackcurrant and gooseberry cultivars resistant to powdery mildew.