.>S(» IXSECTU'IDKS, FT' XCrlCIDES, AND WEED KILLERS. 



altises. Gervais advises to mix pyiethra powder with " Cupric-sulpho- 

 steatite ''. Two applications suffice to get quit of this minute insect. 

 Pyiethra extract may likewise be added to cupric bouillies. The 

 extract alone is used at 4 per cent strength. Debray, Prosper, Gervais, 

 Ijecq, and d'Aurelles de Paladine report the terrible action of mixtures 

 containing pyrethra. Taschenberg and Montillot advise to kill in a 

 general way all earth lice by using mixtures of pyi-ethra powder and 

 naphthalene; naphthalene 2 lb., pyrethra powder 1 lb., or pyrethra 

 powder alona 



Lema melanopus, syn. Crioceris inelaiwpa (crioceris of cereals). — 

 To kill the larvye of this insect injurious to grain crops in Hungary, 

 Sajo recommends to spray copiously with aqueous pyrethra extract. 

 This process destroys 75 per cent. Nicotine is regarded as more 

 active. 



Entomnscelis adonidis^ Pall. — Sajo advises 2-5 per cent pyrethra 

 extract to destroy rapidly the larva of this insect which gnaws the leaf 

 of the beet. 



('niu'Jiylis amh'ujnella, Hubn. (cochylis of the vine). — The soapy ex- 

 tract of pyrethra with 3 per cent of soap was recommended (p. 378) by 

 Dufour to kill the caterpillar of this butterfly. The first spraying must 

 be given before flowering, when the caterpillars have just hatched, and 

 the second after flowering. In the opinion of Perraud, Berlese, Silva, 

 Bononi, Nestore, Peghon, and Del Quercio it is one of the best means 

 of killing the red- worm of the vine. It has, however, the disadvantage 

 of being dearer than other insecticides. Sirodot recommends its 

 application by a spraying machine, with an intermittent jet, which is 

 directed on to the grapes morning and evening in the month of July. 



CarjMcajJsa 2)()iao)ieUa, L. (codlin moth). — Mohr recommends 

 his No. 2 extract (p. 378) applied before flowering, to destroy the young 

 ■caterpillars of this pyralis. 



Eriocamjja adumhrata (slimy caterpillar, slug- worm). — Dufour 's 

 soapy extract of pyrethra (p. 378) gives good results in the destruction 

 of the slimy caterpillar (Siedler). 



Ilylotoma romrnm., Fabr. (hylotomeof the rose). — Mohr recommends 

 his No. 1 extract (p. 378) against the false caterpillar of this saw-fly. 

 Taschenberg reports the good results from a mixture of 66 per cent of 

 pyrethra powder and 33 per cent of naphthalene against the larvae of 

 saw-flies in general. 



Atlialia Spinarum (AtJialla centifoLia), [the turnip saw-fly, black 

 caterpillar, blacks, canker, black palmer, nigger or black grub], Fabr. — 

 This saAV-fly, the larvae of which ravage the leaves of beets, may be 

 destroyed, according to Burki, by an aqueous niixtui'e of 4 per cent of 

 soft soap and 1 per cent of extract of pyi-ethra powder. 



Lopm HidcatuH, of which there was an invasion in 1889 into 

 the departments of Indre and Yonne, may be destroyed, according to 

 Praligeon, by the alcoholic and carbon disulphide extracts of pyrethra 

 referi'ed to above. 



Diplosis roslrora. — This rose-fly gnaws the shoots of the rose- 

 bush, especially those of La France, Meteor, and Wooton. Chittenden 

 necommends pyrethra jxjwder to combat it. 



