Effect of pruning time on damage to the leaves of Fortune’s osmanthus (Osmanthus × fortunei ) by a flea beetle Argopistes coccinelliformis (Coleoptera: Chrysomelidae)

UCHIDA Hitoshi, TAKEUCHI Masatoshi

doi:10.34348/urbanpest.11.2_59

Bibliographic Information

Other Title

ヘリグロテントウノミハムシによるヒイラギモクセイの被害に及ぼす剪定時期の影響

Description

The flea beetle Argopistes coccinelliformis causes severe damage to Oleaceae trees, with a preference for new leaves. In this study, we evaluated the effects of pruning time of Osmanthus × fortunei (March, April, and May, and a no-treatment control) on leaf damage by the beetles by surveying the occurrence of new leaves and percentage of damaged leaves from early April to early July. The number of new leaves and branches during the observation period was the lowest in the May-pruned plots, followed by the April- and March-pruned plots, and no-treatment plot. The percentage of adult beetle-damaged leaves and of leaves with beetle eggs on May 3 tended to be higher in the March-pruned plots; the percentage of damage was the highest in the April-pruned plots, particularly from June, when new adult beetles emerged. Furthermore, higher and lower damages by larvae occurred in the March- and May-pruned plots, respectively. Pruning in March and April is not recommended as it promotes new leaf production resulting in increased damage.

Journal

Urban Pest Management

Urban Pest Management 11 (2), 59-68, 2021

The Society of Urban Pest Management, Japan

Keywords

Details 詳細情報について

CRID: 1390575960085760128

DOI: 10.34348/urbanpest.11.2_59

ISSN: 2435015X; 21861498

Text Lang: ja

Data Source

JaLC

Abstract License Flag: Disallowed

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Effect of pruning time on damage to the leaves of Fortune’s osmanthus (<i>Osmanthus</i> × <i>fortunei</i> ) by a flea beetle <i>Argopistes coccinelliformis</i> (Coleoptera: Chrysomelidae)