422 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 4 



little value to the vineyardist. Very thorough spraying will sometime 

 cause them to migrate and thus save the crop. 



Our experiments were first conducted with the aim of finding a more 

 active poison than arsenate of lead but we learned from cage experi- 

 ments that the rapidity with which the insects die shows little in favor 

 of the theory that the molasses or glucose increases the action of the 

 arsenate of lead, but we find that the beetles relish the sweet material 

 so we have the same explanation for its effectiveness as mth the grape 

 root worm. This alone we beUeve is the cause of the great difference 

 in efficiency between the two sprays. Field experiments conducted 

 this season gave practically the same results as reported for 1910 in 

 Bulletin No. 331 of the N. Y. Agricultural Experiment Station. We 

 also proved that the use of two gallons of molasses is effective and less 

 expensive than 25 lbs. glucose per 100 gallons of material. 



The use of molasses with arsenate of lead in Bordeaux mixture gave 

 the same results as when the arsenate of lead and Bordeaux were used 

 alone. This we believe is due to the excess hme and copper hydrate 

 counteracting the sweetness of the molasses. We regret that this is a 

 fact as it leaves us without a fungicide unless we make extra sprayings 

 after the rose chafer and grape root worm have been disposed of. 



CALIFORNIA REDWOOD ATTACKED BY TERMES 

 LUCIFUGUS ROSSI 1 



By William B. Parker, Bureau Entomology, U. S. Department of Agriculture 



During January, 1911, while investigating the work of Termes 

 lucifugus upon the roots of the hop vine, near Sacramento, California, 

 the writer observed that many California redwood string pegs, used 

 in stringing the yards, were infested by white ants. Many were 

 hollowed out in the manner characteristic of the work of termites, only 

 the outside shell remaining. Others were attacked on the outside, the 

 grooves being covered with sand cemented together. Pegs which had 

 remained in the ground over two seasons were found to be mere shells 

 and full of termites. Last year's pegs although badly damaged were 

 not in such bad condition. 



White ants were also found in the trellis poles, in some cases the 

 portion of the pole under ground being entirely destroyed. Such 

 poles were supported by the trellis wire attached to the tops. They 

 were of little value in supporting a crop of hops. Where moisture had 

 risen in the wood above the surface of the ground, the termites followed 



I Published by permission of the Chief of the Bureau. 



