Screening the nematicidal potential of indigenous medicinal plant extracts against Meloidogyne incognita under lab. and greenhouse conditions

Egyptian Journal of Biological Pest Control

Table 4 Effect of storage period and temperature on extracts nematicidal activity against M. incognita J2 in vitro

Aqueous extract	Conc. (mg D.Wt./L)^a	Expected fresh extracts Mortality % (LDP line)	^bMortality (%)
Aqueous extract	Conc. (mg D.Wt./L)^a	Expected fresh extracts Mortality % (LDP line)	Frozen extracts (− 5 °C) for 1 year	Cooled extracts (5 °C) for 14 days	Cooled extracts (5 °C) for 60 days
Periwinkle	1000	Approx. 90	92	100	71
Periwinkle	2000	> 95	100	100	92
Solidago	1000	Approx. 90	78	95	17
Solidago	2000	> 99	98	100	33
Check	–	7	9	5	2

^amg D.Wt./L= milligram dry leaves per liter.
^b\( \mathsf{Mortality}\%=\frac{\mathsf{Number}\ \mathsf{of}\ \mathsf{dead}\ \mathsf{J}\mathsf{2}\ \mathsf{in}\ \mathsf{a}\ \mathsf{treatment}}{\mathsf{Number}\ \mathsf{of}\ \mathsf{totals}\ \mathsf{tested}\ \mathsf{J}\mathsf{2}\ \mathsf{in}\ \mathsf{the}\ \mathsf{same}\ \mathsf{treatment}} \)