ECONOMIC ZOOLOGY ENTOMOLOGY. IGl 



under the entomolosist's direction during 1914 includes an account of the salt 

 marsh work done under the Little Silver contract, by C. S. Beckwith (pp. 

 415-447), discussions of the mosquito problems in the several counties, mos- 

 quitoes of the year, etc. 



Spraying experim.ents to control thrips upon roses in the greenhouse, 

 M. A. Blake and C H. Connors (New Jersey Stas. Rpt. 1914, PP- SO, JfO). — 

 It is stated that several florists who have used a combination of sugar, water, 

 and Paris green against thrips on roses in the greenhouse appear to have suc- 

 cessfully controlled this pest. It is thought that the change which occurs in 

 the mixture may result in the formation of arsenic sucrate or arsenic glucosate. 

 Application of the formula above mentioned to American Beauty roses in the 

 demonstration greenhouse gave successful results and no burning of any con- 

 sequence resulted. However, when the sugar was replaced by molasses severe 

 burning ensued. 



Results of spray tests in which white sugar, brown sugar, and molasses were 

 used in the formula are presented in tabular form. When white sugar was 

 used no serious burning resulted, whereas brown sugar gave a slight burning 

 and molasses was found to be unsafe to use. 



Peach borer observations at Vineland, M. A, Blake and C. H. Connors 

 (New Jersey Stas. Rpt. 1914, pp. 75-81, pis. 7). — The authors present records 

 of the borers removed from trees in the experimental orchards and the time 

 required for removing them. The observations are summarized as follows : 



"A rather complete study for two years in orchards containing over 60 

 varieties of peaches does not indicate that one variety is more immune from the 

 attacks of the peach borer than another. Certain sections of orchards be- 

 come infested more quickly and more completely than others. Outside rows 

 are commonly more severely infested than interior rows, even regardless of the 

 surrounding conditions. Trees once infested or injured are apparently very 

 susceptible to continued attack. Rows of trees badly infested one year are, 

 therefore, likely to be proportionately affected in succeeding years. A row 

 lightly infested may occur alongside one quite badly infested where the varieties 

 and cultural conditions are the same. The results of experiments with borer 

 repellant considered on the basis of the actual number of borers found after 

 treatment are not complete unless a previous record of infestation has been 

 made. Trees should be examined twice for borers, the examinations to be made 

 a few days apart so that any borers that are overlooked the first time can be 

 discovered at the second examination by the fresh 'sawdust '." 



White grubs or larvs3 of the May beetle in greenhouse soils, M. A. Blake 

 and C. H. Connors (New Jersey Stas. Rpt. 1914, PP- 36, 37). — In treating com- 

 post soil for the destruction of May beetle larvre or white grubs the authors found 

 that applications to the soil of formaldehyde at the strength of 1:75 with a 

 sprinkling can as the soil is being turned with a fork will kill about 50 per cent 

 of the grubs after a few hours' exposure. At this strength and at the rate 

 of 1 : 50 most of the medium-sized larv?e are killed, but the large and small- 

 sized larvte remain alive. 



Woolly aphid of elm and Juneberry (Schizoneura americana in part, of 

 authors), Edith M. Patch (Maine Sta. Bui. 241 (1915), pp. 197-204, fivs- 2).— 

 The author calls attention to the fact that American entomologists have com- 

 monly applied the name «S. americaria to two distinct species of plant lice. The 

 first of the two species, which inhabits the leaf cluster or aphid rosette of the 

 American elm, from, which it migrates to apple, several varieties of mountain 

 ash (Pyrus sp.), and hawthorn (Crataegus), has previously been reported upon 

 and figured by the author (E. S. R., 30, p. 548) as S. lanigera and later by 

 Baker (E. S". R., 32, p. 848) as Eriosoma (S.) lanigera. The second of the two 



