82 



We have found sprays of all kinds ineffective. Our most satis- 

 factory results were obtained when we brushed the lice from the 

 plants and covered them with earth, using an Iron Age cultivator for 

 that purpose. We have designated this the "brush and cultivator 

 method." [For a more complete account of this pest see author's 

 paper on page 55]. 



The fruit-tree bark-beetle, Scolytus rugulosus Ratz., has been a very 

 conspicuous insect in orchard trees this season, especially those injured 

 by the severe freeze of February, 1899. 



The harlequin cabbage bug, Ifurgantia hist7'io7iica Hahn., has not 

 been reported from any locality this season. We attribute its scarce- 

 ness to the freeze of 1899. 



The Hessian fly, Cecidomyia destructor Say, has been very destruc- 

 tive to all early sown wheat. Some late sowings were also injured. 

 The fall of 1899 being very open, the fly seemed to continue its depo- 

 sition of eggs much later than usual. 



The imbricated snout-beetle, JEjnccerus (mhricatus Say, was reported 

 to me as injuring the leaves of cantaloupe in Washington County 

 May 23. 



The imported cabbage worm, Pieris rapce Linn., has maintained its 

 rapacious habits and done much injury to cabbage ov^er a wide area of 

 the State. Paris green, 1 pound in 100 pounds of land plaster, has 

 been the most useful remed3^ 



The imported currant worm, Pteronus rihesii Scop., has been averj^ 

 serious pest upon the currant and gooseberry in all parts of the State 

 where these fruits are grown. Both Paris green and hellebore were 

 used with satisfactory results. Hand picking was resorted to in many 

 cases. 



The Mediterranean flour moth, Ephestiahitehniel1aZQ\\.., has been 

 sent to me from New York, Pennsylvania, Ohio, Canada, and Aus- 

 tralia the past season. We have found, by actual trial, that h3"dro- 

 cyanic-acid gas is the most perfect and effectual remedy yet tried for 

 the flour moth and other mill pests. Large mills in Ohio, Penn- 

 sjdvania, Canada, Oregon, and Texas have been successfully fumigated 

 in accordance with the writer's directions. [For specific directions for 

 using this gas in mills, etc., see author's articles in the "American 

 Miller" (Chicago, 111.), for September and November, 1899.] 



The melon plant-louse, Aphis gossypii Glov., has again appeared 

 in Maryland and promises to do serious damage in certain sections. 

 [August: Was not so serious a pest as was anticipated. It was held 

 in check by lady beetles and parasites]. Hand picking of leaves when 

 first noticed and spraying others with 10 to 12 per cent kerosene 

 emulsion were very effective. 



The pale-striped flea-beetle, Sijstena hlanda Mels. , was again a serious 

 pest to young tomato plants during the latter part of May. No satis- 

 factory remedy has been found. 



