Shared phytochemicals predict efficacy of essential oils against western flower thrips (Frankliniella occidentalis) in the greenhouse

Chemical and Biological Technologies in Agriculture

Table 1 Regression results for the 22 chemical compounds that contributed to each of the principal component axes in the PCA analysis, with WFT proportion mortality as the dependent variable

Variable	df	Intercept	Slope	P
1,8-Cineole	1, 105	0.71797	− 0.00594	0.0017**
α-Phellandrene	1, 105	0.657	0.24033	0.4376
α-Pinene	1, 105	0.66399	0.01484	0.3152
α-Terpinene	1, 105	0.49807	0.45603	< 0.0001***
α-Terpineol	1, 105	0.70117	− 0.01815	0.3449
α-Thujene	1, 105	0.57096	0.40532	< 0.0001***
β-Caryophyllene	1, 105	0.53305	0.19010	< 0.0001***
β-Pinene	1, 105	0.64921	0.09011	0.186
Borneol	1, 105	0.56638	0.32176	< 0.0001***
Camphene	1, 105	0.6697	0.00840	0.2841
cis-p-Menth-2-en-1-ol	1, 105	0.56625	3.87660	< 0.0001***
δ-Cadinene	1, 105	0.50281	4.38670	< 0.0001***
γ-Terpinene	1, 105	0.55162	0.08426	< 0.0001***
Limonene	1, 105	0.68095	− 0.00012	0.9897
Linalool	1, 105	0.56847	0.07272	< 0.0001***
Myrcene	1, 105	0.56738	0.16378	0.0004***
p-Cymene	1, 105	0.6011	0.02961	< 0.0001***
Sabinene	1, 105	0.7086	− 0.19549	0.1479
Terpinen-4-ol	1, 105	0.53989	0.15193	< 0.0001***
Terpinolene	1, 105	0.59369	0.61683	0.0022**
trans-β-Ocimene	1, 105	0.71073	− 0.66029	0.1510
trans-Cadina-1(6),4-diene	1, 105	0.64205	2.04926	0.0379*