Publication: In vitro assay of botanical extracts against chili pepper thrips (Tripidae: Thysanoptera) Frankliniella app.
No Thumbnail Available
Date
2024-05
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Don Mariano Marcos Memorial State University- North La Union Campus
Abstract
Chili pepper thrips (Frankliniella spp) are major insect pests affecting leaves and
fruits of chili pepper worldwide. In view of sustainable agriculture, a safe alternative to
synthetic pesticides is needed. Hence, an in vitro study was conducted to evaluate the
effectiveness of different botanical extracts against chili pepper thrips. This study
includes the morphological characterization of the thrips, determination of the presence
of secondary metabolites of the botanical extracts and the mortality rate, and degree of
effectiveness of the botanical extracts on thrips. The study was conducted at Dangle’s
Farm, Bagutot, Bacnotan, La Union from April 1, 2023 to June 2023. The in vitro assay
was conducted at Suagayan, Sta. Lucia, Ilocos Sur. The phytochemical analysis was done
at LORMA Medical School on May 15-17, 2023. The statistical design used was
Completely Randomized Design with five treatments and three replications.
Morphological characterization confirmed that the insect specimens are Frankliniella
spp (Thripidae:Thysanoptera). This is characterized by having elongated, slender,
cylindrical-shaped and yellow wings with dark tips, they are usually yellowish-brown
with fringes. Furthermore, it has been noted that Frankliniella spp. possesses both
brachypterous (short wings) and macropterous (long wings) wing forms. The head and
thorax have setae, and comb is present in abdomen, with eight antennal segments.
Phytochemical analysis revealed that flavonoid, phenolic compounds and saponins were
present in the three botanical extracts: neem leaves, kakawate leaves and citronella
leaves. In vitro assay showed that thrips sprayed with neem, kakawate, and citronella
extracts have a mortality 26.67%, 13.33%, and 23.33%respectively. While Sevin 85 WP
resulted to 100% mortality rate. Based on BAFPS rating, neem leaf extracts were
moderately effective, kakawate leaf extracts and citronella leaf extracts were less
effective.
Description
Keywords
Citation
Quila, S.H. (2024). In vitro assay of botanical extracts against chili pepper thrips (Tripidae: Thysanoptera) Frankliniella app. [Unpublished Undergraduate Thesis, Don Mariano Marcos Memorial State University- North La Union Campus, Bacnotan, La Union].