File:Better fruit (20361797412).jpg

Title: Better fruit
Identifier: betterfruit00unse (find matches)
Year: [1] (s)
Authors:
Subjects: Fruit-culture
Publisher: Hood River, Or. , Better fruit publishing company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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Page 32 BETTER FRUIT J line
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Copyright 11)10 by R. M. Kellogg Company, Three Rivers, Michigan FIELD OF STRAWBERRIES OF A. R. CUMMINGS AT CANBY, OREGON This is probably one of the finest strawberry fields on the Coast sion was applied at one strength onlj^ namely, a fifteen per cent oil emulsion prepared by using a common laundry soap. Black Leaf was applied at one strength, namely, one gallon to fifty-five gallons of water. Home prepared lime and sulphur was applied at one strength, namely, fifteen pounds of lime and fif- teen pounds of sulphur to fifty gallons of water. This lime and sulphur was made in the ordinary way and was boiled for one hour, so that a first class lime and sulphur spray was prepared. On March 28th the peach buds were just showing their pink tips, and several sprays were again applied. At this time three of the tests were made with a mixed spray of arsenate of lead and one of the tobacco preparations, the arsenate of lead being used for the twig-borer and the tobacco preparation with which it was mixed for the aphis. The follow- ing insecticides were applied at this time to about one hundred and fifty trees: Rex lime and sulphur, one gal- lon to ten gallons of water; Black Leaf, one gallon to fifty gallons of water; Black Leaf, one gallon to seventy gal- lons of water, combined with arsenate of lead three pounds to one hundred gal- lons of water; Black Leaf "40," one gal- lon to eight hundred gallons of water; Black Leaf "40," one gallon to one thou- sand gallons of water, combined with arsenate of lead six pounds to one hun- dred gallons of water; Black Leaf "40," one gallon to nine hundred gallons of 1 2 0 93 water, combined with arsenate of lead ten pounds to one hundred gallons of water. The accompanying table gives the results of the first examination made on March 15, of trees sprayed in the Strain orchard. It may be seen from this table that all insecticides applied on March No. of Aphids Strength of on 6 T'dngs Insecticide Used Insecticide From 2 Trees Black Leaf 1-30 2 Black Leaf * 1-40 2 Black Leaf 1-50 1 Black Leaf 1-70 1 Black Leaf "40" 1-600 0 Black Leaf "40" 1-800 6 Black Leaf "40" 1-1000 7 Rex Lime and Sulphvir. . . 1—10 Rex Lime and Sulphur... 1-11 Soluble Oil 1-20 Check Trees sprayed Jlarch 7, examined March 15. 7th resulted in effective control, at all strengths. Three subsequent examina- tions were made on March 24th, April 26th and May 11th, each one indicating practically the same results. It would seem from this experiment that just as the eggs of this aphis are beginning to hatch is a favorable time to spray for its control. Lime and sulphur proved to be a perfect spray at this time. Appar- ently it gave a little better final results than anything else used. With the exception of Nico-fume, all the tobacco sprays of both early and late applica- tions resulted in much good, but that lime and sulphur applied on the latest date of spraying did not prove beneficial. This application of lime and sulphur was made at a time when some of the first lime and sulphur spraying was being done in the valley, but earlier than much of it. The experience of most of the orchardists was that the lime and sulphur did no good applied late for green peach aphis, which tallies with our expe- rience. This season's experiments indi- cate that the most important thing in connection with the control of this aphis by the use of lime and sulphur is to get it on early; just as the eggs were begin- ning to hatch was found to be a splendid time. If spraying is delayed until the aphis becomes full grown some other spray besides the lime and snlph\ir should be used. This spray will not kill the mature stem-mothers unless applied in excessive quantities. The tubacco sprays are much better to use when mature lice can be found. But these preparations are also more effectual at the time when the eggs are hatching. A great amount of material is required in order to be thorough enough to kill most of the lice after they are fully grown. The average orchardist would prob- ably have a hard time to detect the little lice when they are first hatched, but the importance of spraying at this time should be sufficient reason for him to learn to find them. If this is not pos- sible it would be reasonably safe to say that the lice may be found hatching after the first few days of warm spring- weather in Februarv or March, in the

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