rVbriiary, 1930J agricultural experiments 1929 17 



each plot, and early in the season a distinctly larger amount of growth was 

 attained by plants in the plots which received a considerable amount of 

 acid phosphate. Later in the season, however, these differences tended 

 to disappear. J. R. Hepler conducted the experiment. {Hatch Fund.) 



PARSNIPS RESPOND TO FERTILIZERS 



Experiments by J. R. Hepler on soil fertility in the garden clearly indi- 

 cate that parsnips respond both to commercial fertilizer and stable ma- 

 nure. Limed plots also showed an increased yield of 16per-cent overthe 

 unlimed. The increase from lime was consistent on all plots and was 

 greatest when little fertilizer was used. The largest yield was obtained 

 from the plot receiving 24 tons of manure, 150 pounds tankage, 100 pounds 

 nitrate of soda, 600 pounds acid phosphate, and 150 pounds muriate of 

 potash to the acre. The second highest yield was obtained from the 

 plots which received 16 tons of manure, 250 pounds of tankage, 160 pounds 

 nitrate of soda, 800 pounds acid phosphate, and 300 pounds muriate of 

 potash to the acre. Thirty-two tons of manure to the acre gave the third 

 highest yield. {Hatch Fund.) 



CODLING MOTHS TRAPPED 



A check-up on insect injury in apple orchards in the fall of 1929 indi- 

 cates that in individual orchards the number of moths caught in alcoholic 

 traps in the spring determines the advisability of using a cover spray for 

 codling moth. Where only an occasional moth was caught during the 

 season little codling moth injury occurred later in the orchard. When 

 ten or more moths were caught at the same time a spray proved very 

 worth while. 



Moths were found in the plots at the first examination June 12, in 

 orchards at Hollis, Greenland and Lyndeboro. The nioths continued to 

 emerge throughout the months of July and August, but no definite peak 

 of emergence occurred. From July 1 to July 20 the number of moths 

 caught gradually increased, and then remained more or less constant until 

 August 20, when the emergence declined rapidly. Only a few were caught 

 after August 25. The traps were set up and visited by E. J. Rasmussen. 

 {State Fund.) 



FINDING POLLINIZERS FOR MCINTOSH 



The Delicious variety maintained its place as a most reliable poUinizer 

 for Mcintosh during the 1929 season, according to the hand pollinations 

 made by L. P. Latimer. This variety was surpassed only by Red Astra- 

 chan and Williams. Other satisfactory varieties were Cortland, Olden- 

 berg, and Wealthy. Gravenstein pollen gave an unsatisfactory set and 

 Baldwin again proved of no value. 



The relatively low amount of set from the Wagener pollen, in contrast 

 to the excellent results previously obtained, is explained by verj' cold 

 weather during the Wagener polhnation period. On one day pollinizing 

 with Wagener did give by far the highest set. 



Little or no difference in the size of the Mcintosh fruit resulted from 

 the different crosses. There were, however, significant differences in the 



