82 



Mississippi Valley Horticultural Society. 



formations, and the stages in which each species occurs at any time. Thi» 

 table is of course far from complete, since the life histories of but few species 

 have been made out in full. In some instances it is not impossible that it 

 may be found incorrect, although all possible pains have been taken to select 

 the data from the best authorities, as far as they were not derived from our 

 personal experience. Observations made in those years when the seasons 

 are very much accelerated or retarded, will possibly, also, be found to differ 

 somewhat from the particulars of this table, and differences due to latitude 

 may likewise occasionally be noticed. This must therefore be taken merely 

 as a general statement of the truth, subject to future correction, but under- 

 stood with these limitations, it will be found useful for guidance in practical, 

 work. 



CALENDAR OF STRAWBERRY INSECTS. 



E, egg ; L, larva ; P, pupa ; I, imago, or perfect insect ; 1, in ground ; 2, on vines ; 3, in petiole : 

 4. on leaves ; .5, in crown ; 6, free; 7, on flowers; 8, on ground ; 9, on crown; *, nocturnal. 



The principal modes of fighting insects may be classified under three 

 heads; modes of culture, barriers to progress, and topical applications. The 

 modes of culture may be directed either to the destruction of the insect, or 

 to the support of the plant under insect injuries, enabling it to rally against 

 them. They are commonly the simplest, most convenient, and cheapest 

 methods of controlling insect depredations, when they do really control, and 

 should consequently be treated first. As a crop must be cultivated at any 

 rate, if by varying slightly the times and modes of our culture we can take ad- 



