330 



THE AGRICULTUEAL NEWS. 



October 21, 1905. 



INSECT NOTES. 



The Success Knapsack Sprayer. 



The ' Success ' is a very popular funii of knapsack 

 sprayer, and quite a number are in use in the "West Indies. 

 It consists of a copper tank, of .5 gallons capacity, pump aiid 

 agitator, and is furnished with discharge hose and nozzle. It 

 is carried on the back and held in place by straiis going over 

 the shoulders, thus leaving the hands free to pump and to 

 direct the spray. 



The ' Success ' sprayer is so arranged that either hand 

 may be used for pumi)ing while being carried, or the pump 

 lever may be taken off and a handle attached to the top of 

 the i>unip and used as a bucket sprayer. This form of 







Fig. 2?>. The Succe.'j.s Ksaps.ack Srr.AYEu. 



sprayer differs from the Auto-spray (see Agrkult and Xriff, 

 Vol. IV, p. 186) in that pumping is continuous during the 

 spraying operation. 



The 'Success' knapsack sprayer will be found very 

 useful in spraying garden plants, small orchard trees, and 

 for general use in all places inaccessible for barrel sprayers, 

 such as tho.se described on p. I'-'U of this volume of the 

 Agricultwal Neirs. 



By means of a nozzle extension, made of a piece of 

 gas-jiipe, G or 8 feet in length, trees 10 or VI feet in height 

 could easily be sprayed with this machine. 



Fig. 23 shows a knaiisack sprayer and bucket sprayer 

 combined with a .5-gallon cop[>er tank to hold the liipiid 

 which is ai>iilied in a mistdike spray. The dotted line shows 

 the handle used in pumping when the lever is taken oft' and 

 the instrument is u.sed as a bucket sprayer. 



The ' Success ' knai'sack s[)rayer is useful for applying 

 both insecticides and fungicides. For spraying with Paris 

 green or kerosene emulsion the Vermorel type of nozzle 

 should be used, while for Bordeau.x mixture the special 

 Bordeaux nozzle would be better. The automatic agitator 

 is a special feature of this apparatus. 



Spraying Cattle for Ticks. 



A large amount of work has been done in Cape Colony 

 on the control of cattle ticks especially those concerned in 

 comnmnicating such serious disea.ses as Heartwater, Red- 

 water and African coast fever. The dipjiing of infested 

 cattle in tanks especially constructed for the purpose has 

 been strongly recommended and piractised on a large scale. 

 At the i)resent time, however, spraying is being advocated 

 by certain cattle owners who claim it to be preferable to 

 dipping. The materials used for dipping are arsenical 

 solutions, which sometimes have an injurious efl'ect on the 

 cattle treated. The spraying is done with a mechanical 

 mixture of kerosene and water. It is claimed by the 

 advocates of spraying that it is cheaper in its initial cost and 

 in its aiijilicalion than dipping, and that it is more efficacious 

 in killing the ticks and never injures the cattle. 



No serious di.seases are common in these islands which 

 are spread by the agency of cattle ticks, the West Indian 

 ticks injuring cattle merely by their habit of feeding on them, 

 and few i)lanters care to go to the expense of building a costly 

 dipping tank for the sake of controlling these ticks; but 

 spraying might be resorted to, as the initial cost for pump 

 and hose is small. 



A discussion on the relative merits of the two methods 

 is now going on in the Aijricultural Journal of the Cape of 

 Good Hope, in which the respective advocates state results 

 at some length : it will be of interest in the West Indies to 

 know what conclusions are reached. I'p to the present 

 time the Government Entomologist and the Government 

 Veterinarian continue to recommend dipping. 



TROPICAL PRODUCTS IN THE UNITED 

 STATES. 



Tlic f'ullowirg figiu-es, abstracted from tlie Yedr- 

 hoolc of the U.S. Department of Agriculture for 1904, 

 show the amounts and values of tlic imports of certain 

 tropical products into the United States during the 

 year 1903-4:— 



