375 



degrees of light intensity and soil moisture, the author has found 

 that the sensitiveness of the plants varies inversely with the light 

 intensity and directly with the soil humidity. Hence, it follows 

 that fumigation may most safely be practised in dry weather and on 

 a clear starlight night \\'ithout a moon, following on a period of 4 or 5 

 smmy days, which will have increased the resistance of the plant cells. 



Johnston (J. B.) & Cardin (P.), Aleurocanthus woglmni, a Hemi- 

 pteran Pest on Several Cultivated Plants In the Island of Cuba.— 



Inter nat. Rev. Science and Practice Agric, Mthly. Bull. Agric. 

 Intell. and PI. Dis., Rome, vii, no. 12, December 1916, p. 1826. 

 (Abstract from Modern Cuba — Cuba Moierna, Havana, 1916, 

 iv (viii), no. 6, pp. 8-11.) [Received 26th June 1917.] 



Aleurocanthus woglmni is recorded from citrus, coffee, mango and 

 other plants in Cuba. A description of this Aleurodid is given. 



Stehlik (W.). a New Remedy for the Successful Control of Elateridae. 



Infernat. Rev. Science and Practice Agric, Mthly. Bidl. Agric. 

 Intell. and PI. Dis., Rome, viii, no. 1, January 1917, p. 172. 

 (Abstract from Blatter fiir Zuckerrubenbau , Berlin, 1916, Year xxiii, 

 no. 14, pp. 165-167.) [Received 26th June 1917.] 



Large numbers of the beetles, Agriotes lineatus and A. ohscurus, 

 were found in many localities feeding on the pollen of seeding sugar- 

 beets. The best method of control consists of leaving in the fields 

 trap-plots of seeding beets from which the insects can be collected at 

 frequent intervals by shaking them into an open bag waxed on the 

 inside to prevent their climbing out. As many as 6,000 have been 

 taken by this method in a single day. 



Fallada (0.). Diseases and Pests of the Sugar-beet observed in 

 Austria-Hungary during 1915. — Internat. Rev. Science and 

 Practice Agric, Mthly. Bidl. Agric Intell. and PI. Dis,, Rome, viii, 

 no. 1, January 1917, pp. 172-174. (Abstract from Osterreichisch- 

 Ungarische Zeitschrift fur Zuckerindustrie und Landwirtschaft, 

 Vienna, 1916, part 3, pp. 107-116.) [Received 26th June 1917.] 



The larvae of the beetles, Agriotes lineatus and A. obscurus, caused 

 great damage in Bohemia, but these wire worms have not yet appeared 

 in Hungarian beet-fields. Less numerous pests were the larvae of 

 Melolontha nielolontha [vulgaris), Rhizotrogus aequinoctialis, Silpha 

 reticulata, S. atrata and Cleonus sp., which did little damage. The 

 flea-beetle, Haltica sp., one of the worst enemies of sugar-beet, occurred 

 in Central Bohemia and eastern and southern Hungary. A second 

 sowing had to be carried out in districts where it appeared together 

 with wireworms. Agrotis segetum was very injurious in central Bohe- 

 mia, and isolated attacks were reported of the moth, Phthorimaea 

 {Lita) sp., probably P. atriplicella, Pegoniyia hyoscyami {Anthomyia 

 conformis), and Aphis runiicis (papaveris). Other sugar-beet pests 

 such as Gryllotalpa gryllotalpa (vulgaris), Atomaria linearis, Cassida 

 nebulosa, Tetranychus telarius, Jidus sp., Athalia colibri {spinarum) 

 and Tipula oleracea caused no damage during 1915, 



