Effect of different plant extracts and nanoparticles on Thrips tabaci (Lind.) (Thysanoptera: Thripidae) under field conditions and their allelopathic potential on the onion, Allium cepa L. using bioassays and RAPD analysis

Egyptian Journal of Biological Pest Control

Table 3 Studies on the initial (Init.) and persistence (Pers.) reduction values of the high concentrations, the potency level and the susceptibility index of Aerosil 200® and four plant extracts applied to Thrips tabaci in an onion field

Compound	Initial and Pers. reduction		Potency level			Susceptibility index
Compound	Initial	Persistence*	Initial	Persistence	General mean	Initial	Persistence	General mean
Aerosil 200®	83.66	73.18	1.12	1.09	1.10	91	93	92
Trigonella foenum-graecum	81.08	67.78	1.08	1.01	1.03	88	81	87
Mentha arvensis	86.92	71.46	1.16	1.06	1.09	95	91	92
Matricaria chamomilla	74.49	66.94	1.00	1.00	1	81	81	84
Cinnamomum camphora	91.38	78.29	1.22	1.16	1.18	100	100	100

*Persistence: average number of Thrips tabaci in treatments within interval time 3, 7, and 10 days