No. 6. 



DEPARTMENT OF AGRICULTURE. 



Iftl 



CODLING MOTH SPRAYING. 



In spraying- for codling n^.th, 16 per cent, of the reports used Paris Green and 

 84 per cent, used Arsenate of Lead as a poison base. Eight per cent, used home- 

 made Bordeaux with Paris Green, the same percentage used home-made Bor- 

 deaux with Arsenate of Lead. Of the 84 per cent, using Arsenate of Lead, 61 

 per cent, used a commercial preparation which is a combination of Arsenate of 

 Lead and Bordeaux and -comes in paste form all ready for use. 



The home-made Bordeaux-Paris Green mixture was made by adding % pound 

 of Paris Green to 50 gallons of 4-6-50 Bordeaux. The home-made Bordeaux and 

 Arsenate of Lead was made by adding one pound of Arsenate of Lead to 100 

 gallons of 4-6-50 Bordeaux. The commercial combination of Arsenate of Lead 

 and Bordeaux in paste form was used at the rate of 16 pounds to 100 gallons 

 of water. 



COST OF 100 GALLONS DILUTE SPRAT. 

 MATERIALS. 



COST OF MAKING AND APPLYING 100 GALLONS. 



Labor. 



Paris Green-Bordeaux 



Arsenate of Lead, 



Commercial Arsenate of Lead-Bord., 



Average 



$.64 

 .67 

 .69 



Materials. 



$1.12 

 .69 



2.28 



.66 



1.36 



Totals. 



$1.77 

 1.36 

 2.97 



2.02 



RESULTS. 



The results of spraying for codling moth were very satisfactory where trees 

 were sprayed well, twice, some reports claiming less than a half per cent, of 

 wormy fruit. One report mentions the marked difference on opposite sides of 

 the same trees, one side having been sprayed and the other omitted. Where 

 Bordeaux was present in the spray mixture there was a very noticeable im- 

 provement in the foliage. 



The per tree cost of doing this codling moth spraying seems to be about 8 

 cents for trees fifteen years old and 10 to 12 cents for older trees of moderate 

 size, running up to 15 to 20 cents for very large trees, these amounts being 

 for one application. There should always be two good applications; one just 

 after the petals fall and the other two to three weeks later followed by a third 

 in case there is much fungus on fruit or foliage. Our experience has shown 

 Arsenate of Lead to be vastly more satisfactory than Paris Green as a protec- 

 tion against chewing insects. It seems to be absolutely harmless to the most 

 tender foiiage, adheres to leaves during entire season and kills any insect that 

 eats it. The commercial combination of Arsenate of Lead and Bordeaux paste, 

 mentioned above, seems to be much in favor here wherever there is any fungus 

 trouble of foliage or fruit to combat. 



Viewing the subject of spraying from a general standpoint, we think we have 

 reason to feel that we are on the right track. Fruit exhibited by this Associa- 

 tion at the last two annual sessions of t!ie State Horticultural Association, has 

 been granted the highest award for excellence each time. We believe no higher 

 price v,-as paid in this State last Fall at picking time for the varieties we grow 

 than was given for Adams county fruit. Quite a little of it was shipped for 

 direct export. 



As an encouragement to olher fruit sections of the State, it may not be amiss 

 to add that our shipments have increased three-fold in four years and our cash 

 returns more than four-fold in the same time. Fifteen orchards from which 

 we obtained detailed reports for season of 1907, (210 acres in the aggregate) 



11—6—1907. 



