268 EXPERIMENT STATION RECORD. 



disease {Cordycep^ clarulata) . For fombatinji the scale insects the author recom- 

 mends spraying with kerosene emulsion an<l whale-oil soap. Lecajiiitm nigrofasciatum 

 caused considerable injury to peaches. The species is said to be easily controlled by 

 the use of winter washings. For destroying the young, a2)plications of kerosene 

 emulsion in June and the early part of July are recommended. A larger species of 

 Lecaninm is reported as injuring peaches and is described in detail. It is parasitized 

 by Blastofhrix longipennis, and may be controlled by winter applications of kerosene 

 enuilsion. English-walnut scale is said to have been quite injurious to peach and 

 maple. It may be controlled by the remedies which are usuall}' applied against San 

 Jose scale. 



Dactylop'ivs trlfolil was found in considerable numbers on sugar beets. The beets 

 which were most infected with the insect were stunted, but it was not clear whether 

 this effect was due to the insects or to other causes. Rerious attacks of green aphis 

 are reported as having occurred thrf>ughout the State. In some localities the species 

 was greatly checked by the attacks of a parasite {Aplildius granariaphh) , and syrphus 

 flies. Kerosene emulsion will destroy the aphis, but the feasibility of this method 

 in grain fields is much doubted. The destructive pea louse caused considerable dam- 

 age in various parts of the State. In some places it attacks sweet peas. Spraying 

 with kerosene emulsion or a mixture of kerosene, and the brush and cultivator 

 method are reconnnended for controlling this species. Notes are given on experi- 

 ments in combating spring and fall t'ankerworms. All of the caterpillars were 

 apparently destroyed by two apj^lications of Paris green, (xood results were also 

 ol)tained from the use of bands. 



Rasswood trees were attacked by Hihernia (illdrid and Pliigdlid mrigatarid. These 

 insects may be controlled by the same remedies a^ w"ere recommended for canker- 

 worms. Great damage was caused to onions in a few lot-alities by Clurtopsix ;vi)C(i. 

 The maggots of this species pass the winter inside of the onions. The species appears 

 to be many brooded. The author recommends the destruction of all of the infested 

 oni(jns in the fall, and the use of deterrents, such as carbolic-acid emulsion, kerosene 

 and sand, and tobacco dust. Notes are given on the plum gouger, and in combating 

 this insect the following remedies are recommended: Jarring the trees, destruction 

 of fallen and infested fruits, and repeated spraying with Paris green. 



An attack of Epicaiita rlttata was reported ui)on potatoes. Spraying with Paris 

 green is recommended, or while the insect is present in large numbers it is believed 

 that they may be driven away by brushing. 



Insect record for 1901, C. M. Weed {New Jlampaliire Std. Bnl. 90, pp. 29-44, 

 figa. 1..'). — Brief notes are given on the occurrence of injuries from the following 

 insects: Bih'io alhipmnis, squash bug, squash-vine borer, striped cucumber beetle, 

 ai)ple-leaf hopper, cankerworm, bean weevil, elm-leaf aphis, birch-leaf skeletonizer, 

 fall webworm, white-marked tussock moth, im])orted elm-leaf beetle, oyster-shell 

 bark-louse, brown tail moth, and gypsy moth. The imported elm-leaf beetle is said 

 to have established itself in the northern part of the State. The brown tail moth 

 was once found in the southeastern part of the State, but it is believed to have been 

 temporarily exterminated. 



Report of the entomologist, E. D. Sanderson [Delawan' Sta. Rpt. 1901, ])p. 127- 

 199, j)h. C, figs. 10). — The author jiresents an elaborate account of the plant lice which 

 affect apple trees. An analytical key is given for the identification of each sjDeiues, 

 and detailed notes are given on the life history, hal)its, and means of combating the 

 different species. These include Aplm pomi, A. fitdtii, A. mrhi, and A. breri^ (the 

 last-named species being described as new) . Tables are presented showing the meas- 

 urements of various parts of the body of the different species, and bibliographical 

 references are given in connection with the discussion of each species. A number of 

 experiments were tried in the use of insecticides for destroying apple plant lice. 

 Crude petroleum was found to be much more effective than kerosene and gave satis- 



