THE MONTHLY BULLETIN 



CALIFORNIA STATE COMMISSION OF HORTICULTURE. 



DEVOTED TO HORTICULTURE IN ITS BROADEST SENSE, WITH SPECIAL 



REFERENCE TO PLANT DISEASES, INSECT PESTS, AND 



THEIR CONTROL. 



Sent free to all citizens of the State of California. Offered in exchange for bulletins 

 of the Federal Government and experiment stations, entomological and mvcological 

 journals, agricultural and horticultural papers, botanical and other publications of a 

 similar nature. 



A. J. Cook, State Commissioner of Horticulture Censor 



E. J. VosLER, Secretary State Commission of Horticulture Editor 



ASSOCIATE EDITORS. 



Geo. p. Weldon Chief Deputy Commissioner 



Harry S. Smith Superintendent State Insectary 



Frederick Maskew Chief Deputy Quarantine Officer 



Entered as second class matter December 29, 1911. at the post office at Sacramento, 

 California, under the act of July 16, 1894. 



Sow Bugs. — The various species of the family under consideration 

 are commonly known as sow bugs, wood lice, slaters, etc. They are 

 widely distributed and at times become very troublesome to the 

 horticulturist, and especially the nurseyman. This pest is found feed- 

 ing upon germinating seeds, tender foliage, buds, fruits and many 

 varieties of roots and root crops, also plants, trees and vines such as 

 mushrooms, primroses, strawberries, melons, peaches, orchids, etc. It 

 is especially fond of orchids and shows a decided preference for the 

 Cattleya. These pests exist in large numbers in dark and damp places 

 as under stones, boards, brush piles, vines and plants with thick foliage, 

 and under pots and in crevices in hothouses; are of nocturnal habits 

 and consequently seldom ob-served in daylight unless disturbed. 



CONTROL : POISON BAIT. 

 Bran 12 pounds 



Paris green J pound 



Molasses 1 pint 



(Sufficient water to moisten the bran.) 



The poison bran should be placed around the edges of the hothouse 

 and on benches containing plants. In applying this treatment in the 

 fields scatter the mixture on the ground where these pests are found 

 to occur. — B. B. Whitney. 



Arsenical Sprays. — No apple or pear grower abreast the times 

 will fail to use arsenical sprays in his orchard. He will never fail 

 to apply the calyx spray, will make thoroughness his rule and will 

 never spray until the blossoms have largely fallen from the trees. A 

 wise use of the calyx spray will often abbreviate largely or wholly 

 the necessity of succeeding applications of the poison. Thoroughness 

 in the use of the mixture of sufficient strength and dashing it on 

 to the trees Avith great force that it may scatter everywhere, touching 

 every part of everj^ fruit, are the keys to success. If the spray is 



