ORCHARD SPRAYS

Wairarapa Times-Age, 1 October 1941, Page 3

ORCHARD SPRAYS

FOR USE ON TREES. TIME AT WHICH TO APPLY THEM. The following are the sprays to use for apples: — At the dormant period of winter oil can be applied at the strength of 1 to 20, for the control of scale insects, woolly aphis and red mite. At early green tip Bordeaux mixture, 5 —4 —50, or lime sulphur strength of 1 to 30 can be applied for the control of black spot and powdery mildew. Petal fall: Lime sulphur 1 to 150, plus colloidal 21bs to 100, plus lead arsenate 1-llbs to 21b to 100, plus lead arsenate Hlb to 100, plus hydrated lime, 3ibs to 100, for the control of black spot, powdery mildew, codling moth and bronze beetle, a second application to be made ten to 14 days later, and continued at 18-day intervals throughout the season. In February, two applications of summer oil can be made at ten-clay intervals for the control of red mite, scale in-1 sects, woolly aphis and leaf hopper. Do not apply oil spray until 14 days have elapsed preceding or following sulphur sprays. rears. —Dormant period to bud movement: Winter oil at the strength of 1 to 20 can be applied for the control of San Jose and mussel scales and red mite. Early green tip, apply Bordeaux mixture at the strength of 5— 4 —50 for the control of black spot. Open cluster to pink, apply Bordeaux mixture at the strength of 3—4—50 for the control of black spot. Petal fall: Apply Bordeaux mixture 3—4—50, plus lead arsenate lilbs to 100 for the control of black spot and codling moth. A second application can be made in 14 days’ time and can be continued at 18 to 21 day intervals to mid-January, and later if required. In February two applications at 10-day intervals can be made with summer oil at the strength of 1 to 100 for the control of red mite and scale insects. When preparing Bordeaux sprays dissolve bluestone required in earthenware vessel and then add the quantity of water required. Mix hydrated lime with a little water and add this to the bluestone and water, while be-, ing agitated. The materials required to make four gallons of Bordeaux mixture (s—4— 50) are bluestone 6Jozs, hydrated lime s|ozs., water 4 gallons; materials required for 3—4—50 are bluestone hydrated lime s : ]ozs, and water 4 gallons.