On the environmental factors influencing apple and peach fruit set and chemical thinning, pre-harvest fruit drop control, tree-row-volume sprayer calibration, control of 'Stayman' fruit cracking, fruit quality factors, apple fruit russet, flower bud formation, control of fruit and tree growth with rootbags and growth regulators, the control of pine and meadow voles, prevention of apple and peach tree death by Tomato Ringspot Virus,and apple cultivar evaluations.