154 INJURIOUS UNSECTS OF 1903. 



louse was either NectaropJwra ccrealis or A'', granaria. Either 

 name or any other would answer for our constituents, who did 

 not care "what the beast was called," but desired some remedy 



Entomologist Sanderson of Texas says that this genus 

 caused serious loss in Texas during the season just passed. The 

 above figure shows N. ccrealis in wingless and winged forms and 

 also one killed by a parasite. 



The actual method of hibernation of this louse, assuming it 

 to be A'', ccrealis, is not known, though it is believed that it passes 

 the winter in the egg stage on the wheat. It may and probably 

 does afTect other plants beside wheat, but it is to be noted that 

 it has no connection whatever with the Green Aphis found on 

 the apple, the so-called Apple Aphis, although it resembles it 

 superficially. 



DUST SPRAYING. 



While not wishing to be understood as unqualifiedly endorsing 

 dust spraying, the method certainly has advantages, and is be- 

 coming so prominent, particularly through work in Missouri 

 and Illinois, that the process is certainly worth discussing here. 

 The principle of dust spraying lies in the fact that lime is the 

 conveyor of the insecticide or fungicide, not water. 



Its advantages lie in the fact that 



(a) there are no barrels ot liquid to be hauled; it is excellent, there- 



fore, where it is hard to carry water or to obtain water; 



(b) that the cloud of dust envelopes immense numbers of trees, 



sometimes covering almost an entire orchard: 



(c) one cannot get too much of the spray; 



(d) it costs less than the liquid both in labor and material. 



(e) It seems to be the best method of spraying cabbages, straw- 



berries and small plants generally. 



Its special disadvantages lie in the following facts : 



(a) When a strong wind is blowing it cannot be well used; one is 



obliged to keep to windward side of trees constantly. 



(b) It is best used, apparently, when the dew is on the trees or 



plants, thus relegating the work to the morning hours, 



