-7- 



We do not recommend the use of ENDRIM for controlling orchard mice In 

 Massachusetts orchards for several reasons. The results achieved with Endrln 

 applications In most cases do not Justify the additional expense. Secondly, 

 there is a very real danger of contaminating wells and public water supplies in 

 hilly terrain, especially when using a residual, highly-toxic material. Care 

 should be exercised not to spray vegetation that will be consumed by domestic 

 animals. Also, any drops present during spraying should not be harvested or 

 used for human or animal consumption. Since Endrln is highly toxic to fish 

 at very low concentrations, this material should not be used where it may drain 

 into farm ponds or state stocked waters. If used, careful adherence to label 

 restrictions must be followed and the orchard should be posted. 



HERBICIDES are being used increasingly to control vegetative growth near 

 trees. This will be helpful In reducing mouse infestations. However, growers 

 should check carefully to determine the infestation of mice before winter sets 

 in. Mice may do severe damage under snow cover; hence, it is important to get 

 the orchard treated well ahead of sleet and snow. Some of the most devastating 

 damage has occurred in early winter when a sleet storm covers the grass with ice 

 and is followed by snow. 



RODENT CONTROL IN APPLE STORAGES 



The storage should be baited as it is being filled. Strychnine-treated 

 Steamed-crushed Oats are the recommended bait for mouse control in storages. 

 They maintain their poisonous quality under the humid conditions inside. 

 Teaspoonful quantities of this bait should be placed in stations such as cigar 

 boxes, short lengths of pipe, or sections of rolled roofing paper. These stations 

 should be placed under the pallets, as well as along the walls. Since mice may 

 not travel more than a few feet during the entire winter, numerous bait stations 

 should be used. A room 20' x 20' should have at least 15 bait stations. One 

 application of this bait ordinarily provides adequate protection for the winter. 



ORCHARD MOUSE BAITS 



Orders and remittances for the following materials should be sent to: 

 RODENT CONTROL FUND, University of Massachusetts, Old Conservation Building, 

 Amherst, Massachusetts. Prices are F.O.B. Amherst, Massachusetts. Postal 

 regulations do not permit mailing poisons. Shipments will, therefore, be made 

 by REA Express or Truck Freight, with the shipping charges collect. MAKE CHECK 

 PAYABLE TO: Treas., Rodent Control Fund. 



Zinc Phosphide RODENTICIDE (l~Ounce Cans) $ .30 Can 



(Packed 25 cans to the carton) 



Zinc Phosphide-treated Steamed-crushed OATS. 35 lb. 



(In 10, 25, and 50-pounds bags) 



Strychnine-treated Steamed-crushed OATS 35 lb. 



(In 10 and 25 pound bags) 



These orchard mouse baits are available also from farmer-owned cooperatives. 



- — John W. Peterson 



U.S. Fish and Wildlife Service 



