Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Annual report 1991.

Abstract

Research is reported under the following headings: (1) top fruit (rootstocks for apples, pears, plums and sweet cherries; walnut, hazelnut and Pyrus pyrifolia cultivars; Actinidia species; defoliation of apple and pear nursery stock; and training and pruning in apples); (2) evaluation of top fruit cultivars (apple, pear, plum and sweet cherry trials; and pollination of apple and pear cultivars); (3) small fruit (red currant growing under tunnels, fertigation under tunnels, and defoliation effects on yield; strawberry cultivar trials; cultural practices affecting strawberry yield and quality; and cultivar trials of various small fruits); (4) soil science and plant nutrition (fertigation of apples and pears; irrigation of apples; and water and N uptake by raspberries receiving fertigation); (5) physiology (effect of air temperature and spur leaves on apple fruit mineral supply); and effect of soil temperature, BA and defoliation on apple lateral shoot formation; (6) storage and quality (prediction of optimum harvest date for long-term storage of apples and pears; and optimum storage conditions for apples, pears, red currants and plums); (7) phytopathology (the biology of Colletotrichum acutatum in strawberry; testing of fungicides and acaricides in apples; control of Lepidosaphes ulmi in apples, Cecidophyopsis ribis in black currants, Anthonomus rubi in strawberries, Byturus tomentosus in raspberries and Myzocallis coryli in hazelnuts; pheromone disruption of Adoxophyes orana and Cydia pomonella in top fruit; supervised control of Venturia inaequalis in apples; and biological control of Nectria galligena in apples); (8) entomology (integrated control of Psylla pyri and P. pyricola in apples; earwig (Forficula auricularia) survey in pear orchards; natural parasites of leafroller caterpillars (various species) in pear orchards; and integrated control of Aculus schlechtendali in apples); (9) integrated fruit growing (studies on pesticide and growth-regulator use in apples); and (10) weed control in orchards (herbicides, soil covering materials and cover crops).