Is there any influence of biodynamic preparation 501 on the physiological activity of grape leaves cv. Cesanese d’Affile?

Chemical and Biological Technologies in Agriculture

Table 2 Polyphenols and enzymatic activity (chitinase) measured during three different phenological phases of berry development, during both years of the study

Treatment	Phenological phases	Enzymatic activity (μM/min)	Polyphenols (mg GAE/g fw)
2019
BD-501	BBCH 71	0.60^c	6.92^b
	BBCH 79	0.57^c	4.65^c
	BBCH 83	1.20^a	12.36^a
BD	BBCH 71	0.65^bc	2.85^d
	BBCH 79	0.76^bc	6.10^bc
	BBCH 83	0.90^b	11.50^a
2020
BD-501	BBCH 71	0.83^c	5.45^b
	BBCH 79	0.97^bc	6.82^b
	BBCH 83	1.25^a	12.01^a
BD	BBCH 71	0.85^c	3.16^c
	BBCH 79	0.99^bc	6.45^b
	BBCH 83	1.10^ab	10.71^a

The values are the mean (± SD) of six leaves from 60 plants subjected to two treatments. Different letters in the same column for the same year indicate significant differences among samples (p ≤ 0.05)