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	Zettingsbevordering Conference - FRC Randwijk
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	











	


	
	
	
	









	

				
	

		

		
Zettingsbevordering Conference

        
		
            
            

                
Fruit set promotion in younger Conference plantings is a key concern in most years and often a topic of debate. Various trials and demonstrations at Proeftuin Randwijk in recent years have consistently shown that GA4/7, when applied from full bloom until approximately 7 mm fruit size, has a positive effect on fruit set and size—provided it is applied under favorable conditions (temperature >18°C and sufficient relative humidity). A later application of GA4/7 (>9 mm) often resulted in higher fruit set but also smaller fruit. No clear differences were observed between GA4/7 products (Novagib, Promalin, and Regulex) in these trials. However, the use of GA4/7 on Conference is not yet widely adopted, and it remains a point of contention, particularly in Belgium. Additionally, its temperature dependency makes application timing challenging. To address this, a trial was conducted in 2024 to evaluate alternative methods for improving fruit set in Conference.


            

        



        

            
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