Insects Affecting the Straioherry. 85 



consequently contain the eggs of the moth, would make it imprudent to take 

 young plants from a tield where the insect Avas known to occur. Substan- 

 tially the same remark must be made respecting the leaf-roller. Unless the 

 field has been fired the previous year, all leaves of stools forming earlier than 

 August will be hable to harbor the hibernating pupa, and it is prudent to 

 get plants for a new stand elsewhere. 



Concerning the crown-borer it is safe to say that the earlier in spring 

 plants intended for setting can be removed from a field previously infested 

 by this insect, the less will be their liability to contain the seed of future 

 generations of this most destructive pest. If it is the strawberry plant-louse 

 which we wish to exclude, the case is still more difficult. As already noted, 

 this insect occurs on the plants either as egg or female, at every season of 

 the year, and no security can be had against transferring it unless the plants 

 be dipped, before setting, in some insecticide which will destroy both the 

 lice and eggs. I know of nothing more likely to effect this than the kerosene 

 emulsion, the use of which for horticultural purposes has been so widely and 

 emphatically recommended by Prof. Riley. 



For the protection of the new fields from invasion, I know of no resource 

 Init isolation. Either the entire plantation should be renewed at once, with 

 proper precautions to destroy the insects existing, so that no old fields will 

 remain to infect the new, or else fields of diflerent ages should be separated 

 from each other by areas devoted to othei crops. If one grows raspberries 

 and strawberries both, for example, and wishes so to manage his strawber- 

 ries that he shall have about equal areas in bearing every year, the two crops 

 might be arranged in alternating belts. If these belts were only a few rods 

 wide, the spread of the crown-borer from patch to patch would probably be 

 prevented, and the other insects can be managed by other methods. 



To summarize in a word what may be done, according to the best of our 

 present knowledge, in the case of our hyi^othetical field infested by all known 

 strawberry insects, I would say that we shall have to depend chiefly on in- 

 sect poisons in June and July, and on burning in June, to exterminate all 

 insects but the crown-borers, and that to rid the plants of these, we must 

 plow up the field in the following June, resetting with young jjlants as 

 early as possible in the spring. If the field is not exposed to immediate 

 infection from others near by, we have fair reason to believe that these 

 measures would be found efficient against the insects affecting the straw- 

 berry. 



President Earle, of Illinois — It seems to me, gentlemen, that I 

 have never heard a paper read which possessed more value for us 

 than the one we have just listened to. But before we enter upon 

 the discussion of it we will hear a paper from Mr. A. D. Webb, of 

 Kentucky. Mr. Webb is the originator of several noted varieties 

 of the strawberry, among others, of the liOngfellow and the War- 



