Annual Report of the Wadenswil Horticultural Research Station for 1956-57

Abstract

Physiology and breeding: Breeding of top fruits, small fruits, vegetables and vines; nutrient requirements of top fruits and vines; growth substance treatment of apple rootstock clones, with special reference to time of treatment; frost hardiness of ornamental shrubs; control of autumn colouring in vines by spraying with MgO; leaf analysis for diagnostic purposes; determination of magnesium; the choice of basic values in determining seasonal variations in nutrient content [see abstract 3259]; seasonal changes in the mineral content of fruit trees; physiological changes in stored fruit; temperature measurements in vineyards. Plant protection: Testing insecticides and fungicides; a warning service against fruit pests; forecasting grape berry moth incidence; entomological studies on several horticultural pests, including the biology and control of Otiorrhynchus sulcatus on vines; virus diseases of top fruit and strawberries; die-back of erica roots due to N manuring which kills the mycorrhiza; soil sickness in pansy due to Thielaviopsis basicola and controlled by fumigation with DD; grey mould of vine. Fruit and vegetable utilization: Storage of apples, pears and cherries. Pomology: Rootstocks for fruit trees; deficiency symptoms in orchards and nurseries; manurial trials; locality as affecting tree growth; prevention of damage by spring frosts; biennial bearing in pome fruit; control of fruit drop in cherries by spraying with a-naphthylacetic acid; walnut grafting; orchard costs. Viticulture and oenology: Variety trials; nutrition; labour-saving methods of cultivation and pruning, with tabulated data on labour requirements, yields and quality; spraying equipment; rootstocks; spring frost control by irrigation. Market gardening: Vegetable variety trials.