List of Co-operative Experiments for 1907. 79 



pear or peach orchard. All plats in cover-crop experiments }i acre in 

 extent. Keep soil thoroughly stirred from spring until middle of July, 

 when seed should be sown. Seed furnished by the college. 



31. Mulching versus cover-cropping. — A comparison of these two 

 methods in the same orchard is wanted, to show the effect on yield, 

 color, and size jof fruit. This will make an interesting experiment with 

 any kind of tree fruits, but apple and pear orchards are especially desired. 

 This line of experimentation is one of the most interesting, important 

 and practical now before fruit growers in this State, and any capable 

 grower may readily obtain valuable results. Particulars sent on appli- 

 cation. 



32. Spraying experiment. — Compare the effect of ordinary Bordeaux 

 mixture (4-4-50) with the weaker mixture (3-3-50) which we shall 

 recommend this year, both as to control of scab and amount of spray 

 injury. In mixing the Bordeaux, always put in water between the other 

 two materials. See direction in the recent Spray Calendar. 



33. Nursery stock experiment. — Fumigation of nursery stock seems 

 frequently to be either ineffective in destroying insects, or injurious to 

 the trees, and it is very desirable to know whether dipping the trees com- 

 pletely in warm lime-sulfur wash and thus insuring destruction of scale 

 will prove injurious to the trees. Have the nurseryman do the fumi- 

 gating if you have not the conveniences, — and the dipping, too, if you 

 wish. Plant an equal number of each kind in adjoining rows, and com- 

 pare the growth for the first season. Write for details. 



34. Spraying to prevent peach and plum rot. — Ammoniacal copper 

 carbonate against dilute Bordeaux mixture. Spray twice as fruit is 

 ripening. Spraying material furnished by the college. 



35. Thinning fruit. — Conduct tests on early apples, peaches, and 

 plums. Write for details. 



36. Straii'herries and raspberries. — Test the varieties, both standard 

 and new. 



IV. ENTOMOLOGY. 

 M. V. Slingerland. 



41. Poison sprays for plum and quince curculios. — Experiments with 

 arsenate of lead and arsenite of lime sprays. Specific directions and 

 arsenate of lead furnished by the college. Desire to co-operate with 

 peach growers especially in experiments against the curculio. 



42. Spraying for grape root-worui. — Experiments with arsenate of 

 lead spray to poison the beetles. Specific directions as given in Bulletin 

 208 or the Spray Calendar. (Bui. 217.) 



