Supplementary Report on Insects Affecting the Strmoberrtj. '253 



For the purpose of summarizing the most essential facts relating to insect 

 injuries to the strawberry, and to remedies against such injuries, I have pre- 

 pared the following 



CLASSIFIOATIOX OF INSECT IXJURIES TO THE STRAWBERRY, WITH SUGGES- 

 TIONS OF REMEDIES FOR THEM. 



I have given first a synopsis of insect injuries to this plant, 

 arranged in the form of an ordinary key for the determination of species in 

 natural history, but containing no unnecessary references to the insects 

 themselves ; and have added indications of the proper remedies, in the form 

 of figures and letters referring to the classification of remedies on a following 

 page. In taking up subsequently for description and discussion the separate 

 species of insects known to attack the strawberry, I have arranged these also 

 on the same plan, grouping together under each subdivision of the classifica- 

 tion of insect injuries, all the species now known to produce that especial 

 form of injury. 



As an illustration of the use of the " key '" given below, let us suppose that 

 the strawberry grower notices, after the fruit is harvested, that many of the 

 leaves of his plants are folded or rolled together ; and that oil opening these 

 he discovers a caterpillar in the fold, which has evidently been eating away 

 the surface of the leaf. This injury comes undei"" Injuries to the Leaf and 

 Leaf Stem " (A). Looking at the next line below this in the table, he places 

 it at once in the class of injuries (1) done by eating away the tissue of the 

 leaf. Following the key still further, he finally decides that it is not done by 

 an exposed insect (b*), but by an insect rolled in the leaf (b**). Against 

 this group he finds the reference 3c, 4a, by the first of which he is cited to 

 the discussion of the method of destroying insects of feeble locomotive 

 power, in midsummer, after the fruit isi^icked, by mowing and burning over 

 the field ; and by the second, to the use of arsenical poisons. 

 A. Injuries to the Leaf and Leaf Stem. 



1. The tissue of the leaf eaten away. 



a. When the plant is in fruit. 



* By an exposed insect, 4c, 3a. 



** By an insect concealed in a rolled or folded leaf, 3a. 

 h. When not in fruit. 



* By an exposed insect, 4a. 



** By a concealed insect, 3c, 4a. 



2. The tissue not eaten, but pierced, and drained of sap. 



a. A gall on the stem, 3a. 

 h. Not making gall, 4cde. 



B. To the Flower aiid Flower Stem. 



1. By an exposed insect, 3b, 4c. 



2. By an insect concealed in a cluster of webbed leaves and bhjssoms, 3a. 



C. To the Fruit, Ripe or Unripe. 



