so little growth, collection of samples was difficult. The results of the leaf 

 analyses are sho\m below: 



Mineral Content of Leaves Expressed as °L Dry Weight 



It can be noted in the table above that the nitrogen and potassium levels 

 were low. The nitrogen levels may have been partially influenced by the light 

 crop. Nitrogen level is apt to be higher on trees having large crops. 



The grower had been applying 6 pounds of 10-10-10 fertilizer per tree. 

 However, in 1958, 10 to 12 pounds of 8-16-16 fertilizer was applied per tree and 

 during the summer the trees were heavily mulched. Only 4 or 5 pounds of 8-16-16 

 was applied per tree in the spring of 1959 because of the heavy mulch application 

 of 1958. Observations made by the \jriter in July of this past summer revealed 

 the trees sampled in 1957 had a large crop and were vigorous. Out of curiousity, 

 three of the six trees sampled in 1957 were re-sampled and the results shown below: 



Mineral Content of Leaves Expressed as % Dry Weight 



It can be noted above that the nitrogen level was considerably higher than 

 in 1957. The grower made a wise decision when he reduced the fertilizer application 

 rate in the spring of 1959 because of the heavy mulch program of 1958. If the 

 fertilizer rate had not been reduced the per cent leaf nitrogen might have been 

 higher and fruit color and firmness reduced. 



-— W. J. Lord 



I I I I I I I I I I I I I I I I I I 



Control of Red-Banded Leaf Roller 



In the January issue of "Fruit Notes", we stated that leaf roller resistance 

 to TDE was the factor responsible for our troubles in controlling this pest in some 

 of our orchards. Research in another state has shown that newly hatched red-banded 

 leaf roller worms are still easy to kill with TDE, however, the older and larger 

 worms are resistant to TDE, while the young newly hatched worms are still susceptible 



