349 

 Bogdanov-Katkov (N. N). KpaTKMfl CeefleHMfl o rnaBHeMiuMX 



BpeAMie/lflX CenbCKO-XocflMCTBeHHblX PaCieHMM. [Brief Sum- 

 maries of the chief Pests of Agricultural Plants.] — Qlfl. OTTMCK 

 M3 «CnpaBOHHOM KhmwkM PycCKOrO ArpOHOMa» [Separate from 

 Handbook of the Russian Agronomist], Petersburg, 1920, 25 pp. 

 [Received 13th May 1921.] 



The pests dealt with in this paper are tabulated according to the 

 crops attacked, brief notes being given with reference to the most 

 injurious stages, important biological characteristics, distribution and 

 remedial measures. A table for the preparation of insecticides is 

 also appended. 



Davidov (A). fl6noHHafl Monb. [Apple Moth.]— focyflapcTBeHHoe 



MSAaTe/lbCTBO [Govermnent Publication], Petersburg, 1920, 4 pp., 

 1 fig. [Received 13th May 1921.] 



The maximum flight of Hyponomeuta maUnellus, Z., occurs in July. 

 Oviposition takes place during this time on the two- to three-year-old 

 shoots of apple trees. The eggs, which are laid in batches of from 15 to 

 60 and hatch in about three to four weeks, are covered with a secretion 

 that forms a hardened shell when exposed to the air. The emerging 

 larvae hibernate under this until the first buds appear in the following 

 spring. They feed on the leaves, and form a web-like covering fbr 

 protection against enemies and weather. In June large numbers of 

 larvae collect in one nest, sometimes as many as 1,000, and begin to 

 form cocoons. Pupation lasts from two to three weeks. The remedial 

 measures advocated are collection of leaves containing feeding larvae, 

 spraying with Paris green immediately after the blossoms appear, and 

 the collection and destruction of nests. 



Davidov (A.). fl6J10HHblM UBeTOeA- [Anthonomus pomorum, L.] 

 — TocyflapCTBeHHOe MSAaienbCTBO [Government Publication], 

 Petersburg, 1920. 4 pp., 1 fig. [Received 13th May 1921.] 



Anthonomus pomorum, L., is one of the chief orchard pests in the 

 Petersburg district. A brief account is given of its life-history. 

 The remedial measures advocated include thorough cleansing of the 

 bark, the application of sticky bands, spraying with 3 lb. of freshly 

 slaked lime to 3 gals, of water and hand collection of buds 

 containing larvae and pupae. 



Bogdanov-Katkov (N. N.). ripMroTOBneHMe M HpHMeHeHMe 

 fnaBHeMiuMx CocraBOB, ynorpeO/ifleMbix i\nn yHMHTOweHMn 



BpeAHblX OropOAHblX HaceKOIWblX. [Preparation and .\pphcation 

 of the chief Compounds used for the Destruction of noxious 

 Insects of the Kitchen Garden.] — TocyAapCTBeHHOe MSAare/lbCTBO 



^Government Publication'^, Petersburg, 1920, 13 pp., 6 figs. 

 [Received 13th May 1921.] 



This bulletin contains general rules for the times and methods of 

 spraying as well as instructions for the preparation of the chief 

 insecticides. 



