18 



Blunck (H.). Die niederen tierischen Feinde unserer Gespinstpflanzen. 



[The lower Animal Enemies of our Textile Plants, j — ///. Landiv. 

 Zeitg., xl, 1920, pp. 259-260. (Abstract in Centralbl. Bakt. Paras. 

 Infekt., Jena, lite Abt., liv, no. 11-19, 2nd September 1921, 

 pp. 409-410.) 



The pests common to both hemp and flax are a Nematode, Tylenchus 

 dipsaci, Kiihn {devastatrix) ; spinning mites, Tetranychus spp. ; 

 Lepidoptera, especially Phytometra {Plnsia) gamma, L., and Heliothis 

 dipsacea, L. ; and Melolonthid larvae. 



Pests peculiar to hemp include the hop aphis, Phorodon (Myzus) 

 Jmmnli, Schr. ; the leaf-mining fly, Agromyza strigata, Mg. ; the 

 Pyralid, Pyrausta nubilalis, Hb. ; the Noctuid, PoUa {Mamestra) persi- 

 cariae, L. ; and the adults of the flea-beetle, Psylliodcs attenuata, Koch. 



Flax pests include a root Nematode, Heterodera radicicola, Gveei ; 

 Thrips linearius, Uzel ; various Tipulid larvae ; a moth, Phalonia 

 epilinana, Zell. ; a flea-beetle, Longitarsus parvidus, Payk. ; and 

 wireworms. 



Friederichs (K.). Die angewandte Entomologie als selbstandige 



Disziplin. [Applied Entomology as an Independent Science.] — 

 Centralbl. Bakt. Paras. Infekt., Jena, lite Abt., liv, no. 20-24, 

 7th October 1921, pp. 486-491. 



This paper advances the claims of applied entomology to an inde- 

 pendent position among the sciences in Germany, and quotes the 

 opinions of Howard [R.A.E., A, ill, 353] and Escherich [R.A.E., A, 

 ix, 257], with which full agreement is expressed. 



FuLMEK (L.) & Stift (A.). Ueber im Jahre 1920 ersehienene bemer- 

 kenswerte Mitteilungen auf dem Gebiete der tierischen und pflanz- 

 liehen Feinde der Kartoffelpflanze. [Communications of Value 

 published in 1920 concerning the Animal and Vegetable Enemies 

 of the Potato.] — Centralbl. Bakt. Paras. Infekt., Jena, lite Abt., 

 liv, no. 20-24,"7th October 1921, pp. 492-529. 



This paper reviews the literature on the subject for the year 1920. 



Stellwaag (F.). Neue Wege zur Schadlingsbekampfung. [New 



Ways for promoting Work against Pests.] — Reprint from Deutsch. 

 Obstbauzeitg, 1920, no. 11, 4 pp. (Abstract in Centralbl. Bakt. 

 Paras. Infekt., Jena, lite Abt., liv, no. 20-24, 7th October 1921, 

 pp. 550-551.) 



The work of combating injurious insects in Germany is considered 

 to be behind the times. Many legislative measures have been dis- 

 regarded, and, to remedy this, instruction on popular lines should 

 be given on the various pests. Scientific views should rule in all 

 questions of control, and the authorities must be taught that even 

 dangerous poisons are needful in combating insect pests. The insect 

 pest division of the German Fruit-growers' Association must under- 

 take instruction and propaganda work, arrange for supplies of insecti- 

 cides, promote the production of resistant varieties of fruit-trees, etc., 

 and act generally as a medium between research and practice. 



