15 



rate of 10 or 12 pounds to 100 gallons of water, gave almost absolute 

 protection during the rest of the season. Doctor Felt records " that the 

 application of arsenate of lead along with Bordeaux mixture, for the 

 grape root-worm, shortly after the blossoms had fallen and before the 

 berries had grown to the size of a pea, resulted in a decrease of 50 per 

 cent in the injury to fruit by the berry moth. 



While definite experiments with poisons in the control of this pest 

 appear not yet to have been reported,'' the experience above given 

 indicates their great usefulness. As would appear from the life his- 

 tory of the insect, most effective work may be done by destroying the 

 first brood larvjp, which feed in the clusters of blossoms and berries. 

 The first treatment should be made just before the blossoms are ready 

 to open, and the second just after the blossoms have fallen. A third 

 treatment in a week or ten days is also advisable in badl}^ infested 

 vineyards. In all these treatments special care should be exercised 

 to force the spray well through the clusters of blossoms and young- 

 fruit. It will be noted that the second and third treatments for the 

 grape berry moth will coincide with the first and second treatments 

 For the grape root-worm, and the arsenicals recommended for that 

 insect will be equally satisfactory for the grape berry moth. (See 

 page 10.) 



Picking infested berries. — This practice is often followed by vine- 

 yardists, and is especially directed against larvae of the second brood. 

 The infested spotted green berries, which are readily seen, should be 

 carefully searched for and destroyed. This practice will lessen injury 

 from a possible later brood, and if carefully followed would reduce 

 the insects materially in the vineyard from year to year. 



Bagging clusters. — Inclosing each cluster of grapes in a paper bag 

 soon after the blossoms have fallen should protect them from injury 

 from second and third-brood larvre, and would also afford protection 

 from the rose-chafer and from black-rot. This practice is especially 

 useful in the small home vineyard. 



Gathering fallen leaves. — The fact that the insect passes the winter 

 in fallen leaves has led to the recommendation that these be raked up 

 and burned. From Mr. Johnson's observations it would appear 

 important to collect these early in the fall, as the pupae are to be 

 found mostly on the 10 or 15, per cent of leaves which fall first, and 

 great care must be taken to collect those leaves more or less imbedded 

 in the soil. After remaining on the ground for a while, probably 

 many of the cocoons break off from the leaves and would thus not be 

 collected with the leaves. It is probable also that many of the 

 insects could be destroyed by covering the leaves with soil early in the 

 fall. 



a Bill. 19, Office State Ent. of N. Y., p. 31 (1903). 



b Since this article was written, definite experiments in spraying for the grape berry 

 moth have been reported by Profs. H. A. Gossard and J. S. Houser in Circular 63 

 of the Ohio Agricultural Experiment Station. These gentlemen have shown that the 

 insect may be largely controlled by three applications of an arsenical, with the addi- 

 tion of some form of soap to make the spray more adhesive, the time of making appli- 

 cations being practically as recommended above. 



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