871 



(1) The smallest proportions, as 1 poiiud toSOOor 1,000 gallons, required solongatiine 

 to kill the eaterpillars that they might wander otl" or tliat showers might wash the 

 Paris green from the trees before they wonld cat enongh to kill them; (2) the largo 

 or nearly grown caterpillars Avere quite as readily killed by any of the proportions 

 nsed in these experiments as those just hatched or in early molts; (3) the proportions 

 of 1 pound of Paris green to 100 gallons of water, or 1 pound to 150 gallons sprayed 

 ujiou apple trees, iu experiments that have been conducted here for 3 years past, have 

 burned the foliage to such an extent as to injure the trees very materially; (4) the 

 most suitable proportions to be used on apple trees in this region, and perhaps 

 throughout the State, are 1 pound of Paris green to 200, 250, or 300 gallons of water. 



Cranberry insects (pp. 128-143). — It is estimated that 157,000 barrels 

 of cranberries were raised in ilassacliusetts in 1891. Great injuiy is 

 done to the croiJ by certain insects, chief among which arc the vine worm 

 and frnit worm. Eeplies from cranberry growers to whom a circnlar 

 of inquiry was sent, are summarized. Replowing or burning the bogs, 

 and the axDphcatiou of tobacco as an insecticide are the means com- 

 monly taken for the repression of insects. There is a prejudice against 

 the use of Paris green. The tip worm [Cecidomyia vaccinii), vine worm 

 {RJio})ohotavacciniana), and fruit worm [Mineola vaceinii) are described 

 and illustrated. 



Experiments at the station indicated that Paris green is an effective 

 remedy for the vine worm. Other experiments, in which different 

 amounts of the insecticides were api)lied, indicate that the foliage is 

 greatly injured when the solution is stronger than in the proportion of 

 1 pound of Paris green or London purple to 100 gallons of water, and 

 that a much weaker solution (1 pound to 200 or 300 gallons of water) 

 will kill the vine Avorm. 



The best results in the use of Paris green are obtained by mixing about 2 quarts 

 of glucose, or, if that can not be obtained, molasses with 150 gallons of water and 

 1 pound of Paris green, and applying with a force pump and nozzle which throws the 

 mixture in the form of the finest mist, and continuing till the plants are thoroughly 

 wet, hut stopping before it begins to run off from them. As the Paris green is only 

 in suspension in the water, it should he carefully stirred during all the time the 

 spray is being thrown upon the plants. 



Massachusetts Hatch Station, Meteorological Bulletin No. 40, April, 1892 



(pp. 4). 



A daily and monthly summary of observations for April at the meteor- 

 ological observatory of the station, in charge of C. D. Warner, B. S. 



Michigan Station, Bulletin No. 83, April, 1892 (pp, 26). 



Insecticides and fungicides, L. R. Tapt, M. S. (figs. 11). — 

 Popular information regarding the preparation and use of insecticides 

 and fungicides for the treatment of insect pests and fungous diseases 

 of plants prevalent in Michigan. Downy and powdery mildews of the 

 grape, apple scab, pear blight, black knot of the plum and cherry, 

 brown rot of stone fruits, sliot hole fungus {Septoria pruni)^ plum 

 pockets {Taphrina primi), and wheat rust {Puccinia graminis) are 

 described and illustrated. 



