215 



Talbert (T. J.). Combining Dormant and First Summer Spray in 

 Apple Orchards infested by San Jose Scale. — Missouri Univ. 

 Agric. Expt. Sta., Columbia, Bull. 161, January 1919, 15 pp., 3 figs. 



Details are given of experiments made over several years for the 

 control of the San Jose scale [Asvidiotus jmiiiciosus] in apple orchards. 

 The results show that the dormant spray consisting of commercial 

 lime-sulphur, 33° Be., in dilution of 1 to 7 or 1 to 8 may be safely applied 

 to the trees until the first blooms appear, and thus takes the place of 

 the first summer spray. The spray should be applied at 200 pounds 

 pressure or less, as heavier pressure increases the risk of injury by 

 scorching. This treatment also proved successful in controlhng Apliids, 

 oyster-shell scale [Lepidosaphes ulmi], scurfy scale [Chionaspis furfura] 

 and many other noxious insects. 



Latheop (F. H.). Insect Pests of Stored Grains and Mill Products.— 



Oregon Agric. Coll. Extension Service, CorvaUis. Exten. Bull. 

 228, May 1919, 4 pp., 5 figs. [Received 25th March 1920.] 



A brief account is given of the injury caused to stored grain bv the 

 bean weevil, Bruchus {Acanthoscelides) ohtectus, Say, the pea weevil, 

 B. (Laria) pisorum, Lee, the Mediterranean floiu- moth [Ephestia 

 kuJinielh], the Indian meal moth [Plodia inter punctella] and 

 granary beetles [Calandra]. Fumigation with carbon bisulphide, 

 sulphur or hydrocyanic acid gas, is advocated and the method of 

 apphcation described. 



Hayes (W. P.). The Maize Billbug or Elephant Bug {SphenopJicynis 

 maidis, Chittn.) — Kansas Agric. Expt. Sta., Manhattan, Technical 

 Bull. G, January 1920, 27 pp., 12 figs. 



The different stages and life-history of Sphenophorus maidis, Cliitt., 

 are described, and the natiu-e of injury as well as the remedial measures 

 for this pest are discussed [R.A.E., A", iv, 193 ; vii, 378]. 



Weiss (H. B.). Notes on CorgtJwca hidbosa, 0. & D. — Oliio Jl. Sci., 

 Columbus, XX, no. 1, November 1919, pp. 17-20. [Eeceived 

 24th March 1920.] 



Conjthuca hidbosa, 0. & D., occurs on American bladder nut, 

 Staphylea trifolia, from j\Iaryland and Virginia westwards to Ohio. 



There are five manphal stages, and these as well as the egg and 

 adult are described. During observations made in Philadelphia the 

 eggs and adults were found on 11th June. The eggs are usually 

 inserted in the tissue of the lower leaf-surface near the edges. They 

 are found in groups of from 10 to 250. By 24th of Jane fewer adults 

 were noticed, but in addition to eggs, 2nd and 3rd stage n>Tnphs were 

 noticed feeding in colonies on the undersurface of the leaves. By the 

 8th J aly all adults had disappeared, but aU other stages were present, 

 the 4th and 5th nymphal stages being most plentiful. The first adults 

 of the new generation were seen about 12th July. There is probably 

 only one generation a year. 



