591 



Pape (H.). Brenrmesselschadlinge. [Pests of Stinging Nettles.] — 

 Deutsche Landw. Pressc [Berlin], xlvi, 1919, pp. 528-530, 7 figs. 

 ^Abstract in Zeitschr. Pfianzenkr., Stuttgart, xxxi, no. 3-4, 1921, 

 pp. 115-116.) 



The following insect pests of stinging nettles [which appear to have 

 been of considerable economic value in Germany during the War] 

 are mentioned : the caterpillars of Vanessa spp. and of Sylepta 

 rnralis, Sc, the Coccid, Orthezia nrticae, L., and Aphids. The last- 

 named do the most important damage. ThePsyUid, Trioza urticae, L., 

 causes very harmful leaf -galls. 



Braun (W.). Das Obstbaum-Karbolineum. [Fruit-Tree Carboli- 

 neum.] — lllitstr. Schles. Monatsschr. Obst-, Geniuse- n. Gartenhau, 

 ix, 1920, pp. 22, 26-27. (Abstract in Zeitschr. Pfianzenkr., 

 Stuttgart, xxxi, no. 3-4, 1921, pp. 118-119.) 



Carbolineum painted on nursery boxes, greenhouse walls, etc., may 

 cause severe injury to the young growth of plants, but is suitable for 

 treating wounds in trees, canker, etc., and for destrojnng colonies of 

 Eriosoma lanigenim. Only water-soluble carbolineum should be used, 

 especially for spraying. Trees may be painted in February with 

 20-30 per cent, carbolineiim. Later on, fruit trees may be sprayed 

 with a 10 per cent, solution (stone fruit with 5 per cent.). Carbolineum 

 must not be used for summer sprays. 



Glindemann ( — ). Die Bekampfung des Fichtennadel-Mark-Wicklers. 



[Measures against Tortrix pygmaeana.] — Ber. Lehranst. Wein-, 

 Obst- u. Gartenbau zu Geisenheim a. Rh., 1919, pp. 75-76. 

 (Abstract in Zeitschr. Pfianzenkr., Stuttgart, xxxi, no. 3-4, 1921, 

 p. 153.) 



Picea pungens glauca and P. alba at Geisenheim have been infested 

 for the second time with Tortrix pygmaeana, and many trees have been 

 entirely defoliated. Some success was attained during the flight 

 period in April by spraying with a solution made with 2 lb. quassia 

 chips and 2 lb. soft soap in 25 gals, water. Weaker solutions proved 

 useless. 



LusTNER (G.). Starke Sehaden an Fiehten und Tannen, verursaeht 

 durch die Blattlaus, Myzaphis abietina, Walker. [Severe Damage 

 to Spruce and Silver Firs by an Aphid, M. abietina, Wlk.] — 

 Ber. Lehranst. Wein-, Obst- u. Gartenbau zu Geisenheim a. Rh., 

 1919, pp. 130-131. (Abstract in Zeitschr. Pfianzenkr., Stuttgart, 

 xxxi, no. 3-4, 1921, pp. 157-158.) 



In Wiesbaden Myzaphis abietina, Wlk., injured Picca pungens 

 glauca very severely and in Baden Baden it attacked this tree and also 

 P. sitchensis, P. excelsa, .Abies coerulea and A. engelmanni. In May 

 the needles that have turned browTi fall off. Borner recorded this 

 Aphid in 1916 from P. alba near Metz. Sprays of liver of sulphur, 

 and lysol were effective, but could not be applied in the case of tall 

 trees. Nicotine and soft-soap are also useful. 



