- 8 - 



is not often enough. Have soLie receptacleE rdth tight fitting covers 

 which can be. used to hold refuse between collectionst 



The pomace from the cider press is very attractive to the tiny fruit 

 flies arjd the many small pieces that are spilled and not cleaned up 

 right array can serve as breeding spots:for them» Over-ripe and bruised 

 fruit also is very attractive and the slightest break in the skin gives 

 then a chance to lay eggs 9 



Sanitation is 90''o of aay fly control prpgrea« 



2» Residual sprays on surfaces where flies gather; DDT is still very effoc- 

 tive against fruit f lie sand in many areas It is still effective against 

 the ordinary housefly, Liethoxychlor should do as well, Either cf 

 these materials may be used on any surface where flies gather and inhere 

 food products will not actually come into contact with the residue of 

 insecticide. 



For a good residual coating -vj-hich should last all season, you needto 

 use either the DDT or the methoxychlor at a 5.' concentrationo For the 

 50;j ifettable powder, tliis irould mean 8 pounds in each 10 gallons of 

 waterj for the 2^% emulsifiable concentrate (DDT miscible oil) this 

 V7ould mean a dilution of 1 part of the concentrate to each i; parts of 

 water. 



The emulsifiable concentrate would be better on painted or non^porous 

 surfaces and would leave less visible residue, but the wettable- povrders 

 might prove superior on porous surfaces, Yfet the surfaces thoroughly 

 vdthout losing the material through run-off. Do a complete job inside 

 and outside the building but avoid contaminating surfaces TJith which 

 food products vdll come into contact, 



3« Space treatmentswith aerosols ; Some flies are bound to escepe the re- 

 sidu'al material or will te attracted into the stand or cider press room 

 late in the day in spite of strict smtation. You can kill these each 

 night and give them a second shot in the morning so as to startthe day 

 free of flies by using aerosolso There are just two requirements to be 

 met to make these treatments successful and safe. 



You must be able to close the stand or the room so as to prevent cross 

 currents or ventilation in order for the aerosol to be completely ef- 

 fective. 



The aerosol used must contain either pyrethrins or allethrin plus acti- 

 vator materials like piperonyl butoxide, sulfoxide or :':G-26U, Ihey 

 shou3d not contain DDT, methoxychlor, lindane, chlordane or any similar 

 materials. 



The economical vjay to purchase aerosols isin the form of a ^-pound bomb, 

 at least, I question the advisability of buying the siiiall sizes, al- 

 though some operators have bought tl^em in case lots and found them not 

 too expensive. Follow directions given on the labels to deterndne horf 

 long you need to operate the bomb to obtainiesults in the space you are 



treating, 

 I am sure these sugj^estions - if carried out - iTill help you to have fewer 



