Constituents RIa RIb Pd7i Pd7ni Pd21i Pd21ni Pd30i Pd30ni Pd45i Pd45ni α-Pinene 934 932 0.1*     0.1       0.9 Myrcene 990 988 0.1*     0.1       0.1 Limonene 1026 1024               0.3 (Z)-β-ocimene 1035 1032 0.1*   0.2 0.2 0.1- 0.2     (E)-β-ocimene 1045 1044 1.1+ 0.3 2.0+ 1.3     0.5 0.8 Linalool 1095 1095     0.1*           Eugenol 1357 1356 2.1 2.2 0.8 0.7 0.6*   0.1- 1.2 β-Elemene 1390 1389 2.9 2.7 1.4- 3.3 1.5+ 1.0 1.4- 2.5 Methyl eugenol 1403 1403 91.0+ 88.6 88.3+ 81.5 85.7- 93.3 95.3+ 80.6 β-Caryophyllene 1416 1417 1.0- 1.9 0.4- 1.5 0.6 0.8 0.7 - 1.3 β-Copaene 1430 1430   0.3   0.2   0.1 0.1*   α-Humulene 1455 1452   0.2   0.1 0.4+ 0.1 0.1 0.1 Germacrene D 1484 1484 0.7- 2.2 0.4- 0.7   1.5 0.7- 1.7 Asaricin 1495 1495   0.3             Bicyclogermacrene 1500 1500 0.1- 0.2   0.1   0.2 0.1- 0.2 Germacrene A 1508 1508 0.2 0.3   0.1   0.1     Eugenol acetate 1522 1521 0.4- 0.7 6.1- 9.4 10.7+ 2.3 1.0- 9.1 Elemicin 1555 1555 0.1- 0.2 0.2 0.2 0.2- 0.3 0.1 0.1 Hydrocarbon monoterpenes 1.4+ 0.3 2.2 1.7 0.1- 0.2 0.5- 2.1 Monoterpene oxygenated     0.1           Hydrocarbon sesquiterpenes 4.9- 7.8 2.2- 6.0 2.5- 3.8 3.1- 5.8 Phenylpropanoids 93.6 92.0 95.4+ 91.8 97.2 95.9 96.5+ 91.0 Total 98.5 99.8 97.7 97.8 99.8 99.4 99.6 96.8

RIa = Calculated retention index (DB-5ms capillary column, C8-C30 n-alkanes); RIb = Literature retention index (Adams, 2007); *Constituent emission only in infected plants; +Constituents with increased content in infected plants; -Constituents with reduced content in infected plants; bold letters/numbers = phenylpropanoids

Table 1: Variation in the essential oil compositions of Piper divaricatum infected and non-infected by Fusarium solani f. sp. piperis, over a period of 45 days.