- 4 



Columbia, Canada, Lidster, et a1 . concluded that: "The fruit and 

 orchard profile for expected minimum breakdown incidence would be 

 as follows: (1) high Ca content in apple flesh (minimum of 42.4 

 ppm fresh weight): (2) apple K (potassium) and B (boron) content 

 to be less than 883 and 2.9 ppm, respectively; (3) small apple di- 

 ameters [optimum diameter, 5.8 cm (approximately 2.30 inches)]; 

 (4) low apple soluble solids (below 11.9%); (5) low to moderate 

 tree vigor [terminal growth less than 46 cm (approximately 18 

 inches)]." These 5 factors accounted for 75% of the variation in 

 breakdown among different samples, but that still left 25% to be 

 accounted for by other factors. 



It will be necessary for the grower to understand the complex 

 ity of the Ca problem in apples if the problem is to be success- 

 fully overcome. We have attempted in this brief review to outline 

 the key features of the Ca problem, so that as growers look ahead 

 to the coming season they can better understand why specific ac- 

 tions or conditions can or cannot be expected to influence the Ca 

 levels of their fruit, and thereby influence the storage life and 

 quality of next year's crop. 



*************** 



2,4-D FOR PROBLEM WEEDS IN STRAWBERRIES 



Dominic A. Marini 

 Southeast Regional Fruit and Vegetable Specialist 



Broadleaf perennial weeds, such as dandelions, can be a seri- 

 ous problem when carrying over strawberry beds for 2 or more sea- 

 sons. The commonly used strawberry herbicides do not control these 

 perennial weeds and hand weeding of deep-rooted perennials is vir- 

 tually impossible. 



on ol 

 leaf 

 f rui t 

 gle a 

 V a t i 

 pi ant 

 estab 

 to fr 

 in 2 5 

 appl i 

 growt 



Dow Fo 

 d or e 

 weeds . 

 s , we 

 p p 1 i c a 

 ng the 

 ings. 

 1 i s h e d 

 u i t b u 

 to 50 

 ed dur 

 h. 



rmula 40* 



stabl i shed 



In the 1 



are sugges 



t i n of t h 



harvested 



Furthermo 



beds are 



ds. The r 



gallons o 



ing warm w 



formulation of 2,4-D is now registered for use 



strawberry beds for the control of many broad- 

 977 chemical weed control chart for small 

 ting for the control of broadleaf weeds, a sin- 

 is herbicide applied right after mowing or ren- 



strawberry bed. It should not be used on new 

 re, spring or fall applications of 2,4-D to 

 not recommended because of the possible injury 

 ecommended rate is 1 to 1-1/2 quarts per acre 

 f water. For best results, 2,4-D should be 

 eather when weeds are young and making rapid 



Since many crops and ornamental plants are sensitive to only 

 the slightest trace of 2,4-D, it should be applied under calm con 



*Trade name 



