Ovipositional Deterrent on Mature Stage of Sweet Pepper, Capsicum annuum, against Liriomyza trifolii (Burgess)

Abstract

Liriomyza trifolii (Burgess), the American serpentine leafminer fly, is a well-known serious pest in the world. This insect species attacks plants of more than 21 families including Solanaceae plants. A sweet pepper, Capsicum annuum (Solanaceae), on mature stage, however, shows resistance to this leafminer fly. This resistance is based on the ovipositional deterrent in the sweet pepper leaf against the fly species. Based on the bioassay guided fractionation, phytol [(2E)-3,7,11,15-tetramethyl-2-hexadecen-1-ol] was isolated and identified as an ovipositional deterrent against this insect species. The yield of this compound was 815 µg/g fresh leaf of C. annuum. This compound completely deterred the females from laying their eggs on host plant leaves treated at 35.2 µg/cm 2 .

Induction of Resistance against the Leafminer,Liriomyza trifolii, by Jasmonic Acid in Sweet Pepper

“…4,5) Induced resistance against pathogens has recently been investigated in many plant species, 6) and research on its application to crop protection has also been conducted. 7) This resistance is caused by an accumulation of secondary metabolites, expression of pathogenesis-related genes and proteins, generation of reactive oxygen species and other unknown processes.…”

Levels of Plant Resistance in Chillies Capsicum spp against Whitefly, Bemisia tabaci

“…Further, the release of volatile compounds and defense against phytophagous insects may be another reason for reduced fecundity (Frantz et al, 2004;Kashiwagi et al, 2005). The number of eggs significantly varied among the chillies accessions.…”

Nitrogenous Ovipositional Deterrents in the Leaves of Sweet Pepper (Capsicum annuum) at the Mature Stage against the Leafminer,Liriomyza trifolii(Burgess)

“…5) While conducting a survey of host selection for L. trifolii in a greenhouse, we observed that the leaves of sweet pepper (Capsicum annuum) at a mature stage were rarely attacked by this insect. 9) On the other hand, this species attacks the young leaves of sweet pepper. We have previously reported luteolin 7-O--D-apiofuranosyl-(1 !…”

“…We have previously reported luteolin 7-O--D-apiofuranosyl-(1 ! 2)--D-glucopyranoside 9) and phytol {(2E)-3,7,11,15-tetramethyl-2-hexadecen-1-ol} 10) from the methanol extract of mature C. annuum leaves as ovipositional deterrents against this insect species. In the course of isolating these deterrents, we reported the presence of activity in the aqueous fraction.…”