ink or tar used to catch the moths of the canker worm, or wra piling 

 around the trunk bands of tarred paper, would assist in keeping them 

 away. 



The Eose Bug. — The rose bug has thus far been the most difficult 

 to overcome of the whole tribe of injurious insects, and we can rec- 

 ommend no remedy with a great degree of confidence, but would 

 advise the trial of the fumes of gas tar held under the vines a short 

 time evei-y evening while the grapes are forming. It is certainly 

 otTensive to them, and if used carefully need not injure the plant. 



RosK Slugs.— This insect is easily destroyed by spraying with 

 water and pyrethrum at the rate of one tablespoonful of the latter 

 to a pailful of the former. 



Letters. — Several lettei's have been received asking for informa- 

 tion in regard to insects and fungus injurious to plants, which have 

 been answered by letter, and for general information we insert the 

 answers of a few of them. 



Letter No. 1, containing slioots of the apple tree covered with a 

 coating of black masses containing som« fungus growth. These 

 black masses are the result of dust adhering to the shoots made 

 sticky by the exudations of the common apple aphis or plant louse 

 which were unusually abundant the past two seasons and caused great 

 injury to young trees. The remedy is to syringe with strong soap 

 suds or with a tablespoonful of pyrethrum in one pail of water. 



Letter No 2, contained twigs of the peach tree in which were found 

 a double row of the eggs of the tree cricket (CEcanthus niveits). 

 This insect lays its eggs more commonly in the branches of the rasp- 

 berry and blackberry, but in some cases in those of the peach and 

 plum. The larvae, after hatching, leave the twigs and for a time feed 

 upon plant lice, and later in the season upon succulent ripe fruit. 

 The tree cricket is light green in color, and when full grown, is about 

 three-fourths of an inch long, and lays its eggs in autumn in the eeu- 

 tor of the shoots in long lines as mentioned above. 



S. T. MAYNARD, 



Professor of Botany and Horticulture, 



Mass. Agrictdtural College. 



