478 EXPERIMENT STATION RECORD. 



in the fall as opposed to spraying in the spring. In somecases the applications were 

 made before the foliage had fallen. A number of proprietary soluble petroleum 

 insecticides were used as well as lime and sulphur and kerosene-limoid. In general 

 the damage to the foliage even of peach trees was slight, while the scales were effect- 

 ively destroyed. The author believes that fall spraying is more effective than spring 

 spraying and that the fall should be generally recommended as the proper time for 

 insecticide applications against scale insects. 



Experiments during the summer of 1905 indicate that summer applications of 

 insecticides for scale insects can not be depended upon to do more than hold the 

 scale in check while considerable harm to the trees may result. During these tests 

 in summer spraying tobacco extracts, fish-oil soaps, kerosene emulsion, crude and 

 distillate petroleum, kerosene-limoid, and various combinations of lime and sulphur 

 were used. In all cases the effect upon the scales was unsatisfactory or the trees 

 were too much injured. 



As a result of the author's experiments along this line it is recommended that trees 

 be sprayed in New Jersey as soon as possible after October 15 or as soon as the leaves 

 begin to mature. In case of bad infestation it may be well to repeat the application 

 within two weeks. With regard to a choice of insecticide the author prefers the 

 mineral oils and several proprietary preparations of these oils in a soluble form. It 

 is urged, however, that none of the oil emulsions should be allowed to get cold and 

 that they should be used in as fresh a condition as possible. In the author's opinion 

 the second choice falls on kerosene-limoid and the third on lime and sulphur com- 

 binations. The life history of the scales is also discussed. 



Peach insects, R. I. Smith (Ga. Bd. Ent. Bui. 17, pp. r>:>-i05, fig*. 23).— This 

 bulletin, as stated by the author, contains practical information prepared to meet 

 the growing demand of peach raisers for directions concerning the control of insects 

 injurious to peach trees. The important insects of peach trees are discussed with 

 detailed notes on their appearance, habits, life history, and control. The more 

 important species considered are San Jose scale, Putnam scale, cherry scale, peach 

 lecanium, West Indian peach scale, plum pulvinaria, fruit-tree bark-beetle, peach- 

 tree borer, plum curculio, plant lice, and tent caterpillars. 



The gypsy and brown-tail moths, A. H. Kirkland {Off. Supt. Suppressing 

 Gypsy and Brown-tad Moths [Mass.], Bid. 1, pp. 27, pis. 11, figs. 9). — A copy is given 

 of the recent Massachusetts law relating to gypsy and brown-tail moths. According to 

 this law a superintendent for suppressing the gypsy and brown-tail moths is appointed 

 and an appropriation of $300,000 made available for use during the years 1905-1907. 

 The present bulletin is largely occupied with a description of the gypsy and brown- 

 tail moths and an account of their habits, life history, and distribution w r ith notes 

 on the most effective remedies for controlling them. 



Trypeta ludens in Mexico, J. Isaac (Sacramento: California State Hort. Com., 

 1905, pp. 40, jd*. 4, figs. 17). — On account of the importance of this pest and the 

 extent of its ravages in Mexico, the California commission sent the author to investi- 

 gate the present status of the pest in Mexico and the effectiveness of the means 

 adopted there for its control. 



The author visited the greater part of the orange-growing districts of Mexico with 

 this idea in view and collected much information regarding the distribution of the 

 pest, its origin, parasites, and other points of importance to California orange grow- 

 ers. The insect is described in detail in all of its stages. It appears that the life 

 cycle requires about 3 months so that there may be 4 generations per year. In the 

 high lands of Mexico the pest appears not to be very common, while in the State of 

 Morelos it is serious. 



The remedies adopted in Mexico for the control of this insect include burning or 

 burial of infested oranges, keeping fowls in orange orchards, spraying with an infu- 



