FOES AND FRIENDS OF THE PLANT 



WHERE TO LOOK FOR INSECTS 



In summer. All the insects mentioned above are in their 

 active condition in summer, and may be found in the places 

 described. The leaves of all cultivated plants should be 

 examined. A cheap magnifying glass is useful for this pur- 

 pose. A great variety of insects may be found by making a 

 small net of cheese cloth and sweeping it over the grass. An 

 inverted umbrella placed beneath a bush which is then 

 shaken or beaten will yield many kinds. Others will be 

 found by looking underneath dead bark, or by turning over 

 stones or boards lying on the ground. Do not forget to 

 look in the streams and ponds for water insects. Bring 

 them home in a bottle and put them in a large tumbler of 

 water, together with some of the green scum or other green 

 plants growing in the water. Change the water as often as 

 necessary. These insects are described in any book on insects. 



In winter. Many insects remain active in winter and 

 may easily be studied. Suji^&nLthe potato jworm_in po- 

 tatoes, the vine hopper, plant lice, scale insects, and many 

 others. Others may be found in the egg stage (as the eggs 

 of "red spider on leaves) or in the cocoon stage (as the codling 

 moth cocoons). Many others pass the winter in the ground, 

 as the corn worm, cutworm, thrips, woolly aphis, and phyl- 

 loxera. The harmful grasshoppers are all in the ground in 

 the egg stage at this season. 



How to find the names of insects. Insects which are 

 found injuring cultivated plants will be named if they are 

 sent to the Entomological Department of the Experiment 

 Station in your state. Each kind should be placed in a box 

 by itself (a pill box is sufficient) and a number placed on the 

 box. It is well to prepare two boxes of each kind, sending 



