INSECT ENEMIES AND REMEDIES. 8/ 



This remedy is effective against plant lice, the grape and apple leaf 

 hopper, and the climbing cut-worms, occasionally so destructive to useful 

 vegetation in Colorado. It is applied by means of the force pump and 

 nozzle, already spoken of, observing to discharge the fluid with consider- 

 able force, so as to produce a very finely divided spray. Fields' force 

 pump is considered the best 'for this purpose, and the Nixon Cyclone 

 Nozzle the best of its kind. 



Birds are valuable aids to the tree grower in the destruction of 

 noxious insects. Where it not for the blackbird, our cottonwoods would 

 be destroyed by the cottonwood beetle. The quantity of eggs and larva 

 of insects destroyed annually by birds is astonishingly large. The black- 

 bird and robin, it is true, are predacious .on useful plants, but we could 

 not dispense with their services in ridding us of an excess of injurious 

 insect life. The planting of wind-breaks, shelter-belts and masses of trees 

 and shrubs generally promotes the domestication of birds, in affording 

 them shelter for their nests. 



DESTRUCTIVE INSECTS. 



APPLE LEAF ROLLER (Tortrix-rosaeana}. 



The larva of this leaf roller is very destructive to the foliage of the 

 apple tree early in the season in Colorado. While it is a general feeder, 

 it is found most commonly upon plants of the family Rosacere. Leaf- 

 rolling insects of all kinds may readily be destroyed by the wet mixture 

 of Paris green. 



CABBAGE WORM (Peris Rupee.}. 



This well-known pest was present in Northern Colorado in the sum- 

 mer of 1887 in large numbers. It was our most common butterfly. It 

 was imported from England, and first appeared in the neighborhood of 

 Quebec in 1859. It has since spread all over the United States. The 

 butterfly is white, with black spots upon its wings. It is two-brooded, the 

 second being the most injurious. The first specimens appeared early in 

 March. Pyrethrum is the most effective remedy of any in use for the 

 destruction of this pest. The powder is best applied by means of a 

 Woodason bellows. An active man should be able to sprinkle two or 

 three acres per day. 



