Spraying Trials in the Potato‐growing Area Around the Wash, 1948–53

Comparative Trials of Copper and Dithiocarbamate Fungicides for Potato Blight Control in Somerset and Wiltshire, 1957–1961

“…Apart from a slight yield reduction in once-sprayed copper plots in Ashington in 1957, no symptoms of phytotoxity due to copper sprays were noticed in this work, even in the hot dry season of 1959, a year in which Holmes and Storey ohserved marked phytotoxicity in copper plots. Adverse effects from copper in dry seasons have also heen noticed by Beaumont et d. (1953) in Yorkshire, and by Large et al (1954) in Norfolk. In the present work, copper plots received 5 lb per acre of the element, which is a half, or a third, respectively, of the rates of application in the Yorkshire and Lincolnshire trials.…”

“…A second object was to ascertain over a period of years, the number of seasons in which blight control was economic in the important potato-growing area which centres upon Yeovil in South Somerset. Series of spraying trials with similar objectives to the latter have already been reported from other parts of the country, i.e., Yorkshire (Beaumont, Bant and Storey, 1953), South of the Wash (Large, Taylor, Storey and Yule, 1954), the West Midlands (Rosser, 1957), Hertfordshire (Hirst and Stedman, 1962), and Lincolnshire (Holmes and Storey, 1962). SITUATION Sites were on farms less than 200 ft ahove sea level at Ashington (1957) and at South Petherton (1958)(1959)(1960)(1961)…”

Methods of Plant‐disease Measurement and Forecasting in Great Britain

“…The validity of this method is being checked against the results of actual spraying trials at a number of centres over a long period of years. So far it has given results of the same degree of accuracy as lifting and weighing in randomized block layouts (Beaumont, Bant & Storey, 1953; Large, Taylor, Storey & Yule, 1954).…”

Experiments on the Control of Slugs in Potatoes by means of Molluscicidal Baits

“…Po^ssible loss of yield due to wheel-marking during bait application mast be considered. Consistent information on wheel-marking is difficult to obtain, but it can be argued from work by Large et at (1954) that loss of yield from the single passage of a tractor-mounted distributor with a 30 ft (9 m) swathe-width could be as large as 5 cwt per acre (0-6 t/ha); distributors with a swathe-width of 12 ft (4 m) a.re sometimes used, increasing the loss to 12 cwt per acre (1 -5 t/ha). Other, unpublished, work by the National Agricultural Advisory Service in eastern England in 19.58 showed that, in 12 fi.elds studied, the effects of wheelmarking from one to six passages of a 30 ft boom-width sprayer ranged from a gain of 9 cwt per acre (M t/ha) to a loss of 15 cwt per acre (1-9 t/ha) with an average loss of 5 cwt per acre (0-6 t/ha).…”