The role of Bacillus megaterium and other bio-agents in controlling root-knot nematodes infecting sugar beet under field conditions

Egyptian Journal of Biological Pest Control

Table 3 Impact of certain bio-agents on technological characters as well as peroxidase (PO) and polyphenol oxidase (PPO) activities in roots of sugar beet var. Negma infected with Meloidogyne spp. under field conditions

Treatments	Sucrose %	TSS %	Purity %	Δ Absorbance units/mg protein
Treatments	Sucrose %	TSS %	Purity %	PO activity	PPO activity
NS	15.9^g	20.5^g	77.5^f	0.298^f	0.428^f
HS	15.7^h	20.3^h	77.5^f	0.307^e	0.436^e
BA	15.5ⁱ	20.1ⁱ	77.0^g	0.315^c	0.447^c
DSBC	15.3^j	19.9^j	77.0^g	0.311^d	0.442^d
O	16.1^f	20.7^f	77.9^e	0.295^g	0.425^g
NS + HS	16.9^b	21.6^b	78.0^d	0.275^j	0.406^j
NS + BA	16.7^c	21.3^d	78.6^b	0.284^h	0.419^h
NS + DSBC	16.4^e	20.9^e	78.4^c	0.281ⁱ	0.413ⁱ
NS + O	16.5^d	21.0^e	78.4^c	0.266^k	0.403^k
NS + HS + BA	17.0^a	21.5^c	78.4^c	0.259^l	0.395^l
NS + HS + BA + DSBC + O	17.1^a	21.8^a	79.0^a	0.253^m	0.391^m
DSBL	15.2^k	19.7^k	77.0^g	0.321^b	0.453^b
Untreated plants	15.0^l	19.5^l	76.9^h	0.329^a	0.458^a

Each value presented the mean of three replicates. Means in each column followed by the same letter(s) did not differ at P ≤ 0.05 according to Duncan’s multiple range test
NS nemastrol, HS humisun, BA bio-arc (Bacillus megaterium), DSBC dried sweet basil callus, DSBL dried sweet basil leaf, O oxamyl, TSS total soluble solids