RESPONSES OF Diaphorina citri TO VARIOUS TYPES AND CONCENTRATIONS OF KAOLIN IN HOST FINDING BEHAVIOR ON CITRUS PLANTS

Sinaga, Debora Oktavyatri (2025) RESPONSES OF Diaphorina citri TO VARIOUS TYPES AND CONCENTRATIONS OF KAOLIN IN HOST FINDING BEHAVIOR ON CITRUS PLANTS. Tesis thesis, Universiytas Pembnagunan Nasional Veteran Yogyakarta.

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Abstract

Citrus Vein Phloem Degeneration (CVPD), one of the most destructive citrus
diseases in Indonesia, has caused severe economic losses due to significant yield
reduction, poor fruit quality, and widespread tree mortality. Infected citrus
plantations often suffer up to 60% yield loss, leading to increased production costs
and threatening the sustainability of citrus farming in major producing regions. This
research aimed to determine the responses of the application of different types of
kaolin and the most effective concentration of kaolin on reppeling effecet against
D. citri. A completely randomized design (RAL) was used, involving (Yukami
)
and (Surround
®
WP) at concentrations of 3%, 5%, and 7%. Choice and non-choice
tests were conducted, each with three replications. Observed parameters included
the number of D. citri on leaves, the number of D. citri within the cages, index
repellancy, leaf count, and leaf length. Data were analyzed using analysis of
variance (ANOVA) at a 5% significance level, followed by Duncan’s Multiple
Range Test (DMRT) for post hoc comparisons and a T-test to compare kaolin types.
The results showed that Yukami
®
5% significantly reduced Diaphorina citri
infestation (p < 0.05), indicating its strong repellent effect compared to other
concentrations. In the comparison of kaolin types, both Yukami
®
5% and
Surround
®
WP 7% were more effective than other, both in choice and non-choice
tests. In terms of plant growth, Yukami
®
WP 3% showed the
best results, as the corresponding concentrations did not cause leaf drop. This
implies that kaolin-based treatments have strong potential to be integrated into
citrus pest management programs to reduce vector activity and slow down the
spread of CVPD.
Keyword: Citrus Plant, CVPD, Diaphorina citri, Host finding behavior, Kaolin
®
3% and Surround
®

Item Type: Tugas Akhir (Tesis)
Uncontrolled Keywords: Citrus Plant, CVPD, Diaphorina citri, Host finding behavior, Kaolin ® 3% and Surround ®
Subjek: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian > (S1) Agroteknologi
Depositing User: Eny Suparny
Date Deposited: 27 Jan 2026 03:39
Last Modified: 27 Jan 2026 03:39
URI: http://eprints.upnyk.ac.id/id/eprint/46814

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