1 86 MAINE AGRICULTURAL EXPERIMENT STATION. IO/X). 



September 4, much the same as on August 31. Blight still 

 making some progress. 



September 7. heavy frost which practically put an end to 

 growth. 



That there might be no confusion between the action of the 

 Paris green and the Bug Death, two unsprayed rows were left 

 between the two parts of the piece. On August 1 it was noticed 

 that these two rows were badly infested with slugs and beetles, 

 and that there were very few bugs on the part sprayed with 

 Paris green. In the light of the experiments in the greenhouse, 

 described beyond, the great number of bugs on these untreated 

 rows was probably due to their being driven by the Bug Death. 



EXPERIMENTS WITH BUG DEATH IN THE GREENHOUSE. 



The heavy application (at the rate of 100 pounds to the acre) 

 cleared the vines to which it was applied from bugs. Practically 

 no dead bugs were found in the field and the superintendent of 

 the company said that they very seldom found dead bugs under 

 the plants, but that it cleared the vines when applied in sufficient 

 quantities. In order to observe the effect of the Bug Death 

 more carefully and accurately than is possible in a field test, potato 

 plants were transplanted into the greenhouse in pots and the fol- 

 lowing experiments made, under the oversight of LeRoy H. 

 Harvey. 



The experiments with Bug Death were carried on as four dis- 

 tinct experiments. The potato plants were divided into four 

 groups : each group being separated from the others and enclosed 

 by mosquito netting. The treatment of each group and the 

 observed results follow. The treatment began at 10 A. M. 



FIRST EXPERIMENT 



Statement of Conditions. Three plants were taken. One 

 plant was thoroughly covered with potato slugs, and they were 

 allowed to remain unmolested until they were feeding freely. 

 Then a liberal quantity of Bug Death was uniformly dusted over 

 the plant with the slugs. 



Results : "Within half an hour after the application, the slugs 

 were noticed to be crawling onto the underside of the dusted 

 leaves which were free from the Bug: Death. 



