Irradiation doses of vegetative material and seed of litchis will be adapted according to results obtained during the past season. Higher numbers of different cultivars will be irradiated for establishment in orchards of the litchi improvement program. Annona budwood was irradiated at 35 Gy. Two hundred graftwood was irradiated and grafted on seedling rootstocks and 50 controls were grafted. Grafting success was very poor. Grafting time was probably incorrect and grafting should be done during September. These trials will be repeated during September 2002. Pitanga budwood was irradiated during September 2002 and grafted onto seedling rootstocks. No rootstocks were available and had to be propagated before irradiation could be undertaken.