نتایج جستجو برای: tetranychus urticae

تعداد نتایج: 1748  

2017
Wencai Lu Mengyao Wang Zhifeng Xu Guangmao Shen Peng Wei Ming Li William Reid Lin He

The two-spotted spider mite, Tetranychus urticae, and the carmine spider mite, Tetranychus cinnabarinus, are invasive and native species in China, respectively. Compared with T. cinnabarinus, T. urticae has expanded into most parts of China and has become the dominant species of spider mite since 1983, when it was first reported in China. However, the mechanism of the demographic conversion has...

2011
Renato A. Sarmento Felipe Lemos Cleide R. Dias Wagner T. Kikuchi Jean C. P. Rodrigues Angelo Pallini Maurice W. Sabelis Arne Janssen

Herbivores may interact with each other through resource competition, but also through their impact on plant defence. We recently found that the spider mite Tetranychus evansi down-regulates plant defences in tomato plants, resulting in higher rates of oviposition and population growth on previously attacked than on unattacked leaves. The danger of such down-regulation is that attacked plants c...

Journal: :Molecules 2017
Stefania Sut Roman Pavela Vladislav Kolarčik Loredana Cappellacci Riccardo Petrelli Filippo Maggi Stefano Dall'Acqua Giovanni Benelli

There is an increasing need for the discovery of reliable and eco-friendly pesticides and natural plant-derived products may play a crucial role as source of new active compounds. In this research, a lipophilic extract of Onosma visianii roots extract containing 12% of shikonin derivatives demonstrated significant toxicity and inhibition of oviposition against Tetranychus urticae mites. Extensi...

2017
Bernardus C J Schimmel Livia M S Ataide Rachid Chafi Carlos A Villarroel Juan M Alba Robert C Schuurink Merijn R Kant

Spider mites are destructive arthropod pests on many crops. The generalist herbivorous mite Tetranychus urticae induces defenses in tomato (Solanum lycopersicum) and this constrains its fitness. By contrast, the Solanaceae-specialist Tetranychus evansi maintains a high reproductive performance by suppressing tomato defenses. Tetranychus evansi outcompetes T. urticae when infesting the same plan...

2015
Dongmei Li Qing-Hai Fan David W. Waite Disna Gunawardana Sherly George Lalith Kumarasinghe Xiao-Yue Hong

Spider mites of the genus Tetranychus are difficult to identify due to their limited diagnostic characters. Many of them are morphologically similar and males are needed for species-level identification. Tetranychus urticae is a common interception and non-regulated pest at New Zealand's borders, however, most of the intercepted specimens are females and the identification was left at Tetranych...

2009
M. LAGZIRI

Tetranychus urticae is one of the most important pests of strawberry cultures in Morocco. Current control of this pest relies almost exclusively on acaricides. Unfortunately, this mite has developed resistance to most of the available acaricides. Moreover, insecticide treatments are responsible for the reduction or suppression of beneficial species such as natural predators. Thus, identificatio...

Journal: :Asian Pacific journal of tropical biomedicine 2011
Abd El-Moneim M R Afify Hossam S El-Beltagi Sayed A Fayed Emad A Shalaby

OBJECTIVE To investigate the acaricidal activity of different extracts from Syzygium cumini (S. cumini) (Pomposia) againsst Tetranychus urticae Koch (T. urticae) and the biochemical changes in antioxidants enzymes. METHODS Six extracts of S. cumini (Pomposia) at concentrations of 75, 150 and 300µg/mL were used to control T. urticae (Koch). RESULTS The ethanol extract showed the most efficie...

2009
Y. Li

J. Agric. Entomol. l(}(3):197-203 (July 1993) ABSTRACT Based on data from apple trees without the presence of any predatory mites, the effect of the pyrethroid lambdacyhalothrin on population density of the twospotted spider mite, Tetranychus urticae Koch, is reported. Results show that significantly (P < 0.05) higher numbers of T. urticae were found in pyrethroid·treatcd trees relative to the ...

2017
Bernardus C J Schimmel Livia M S Ataide Merijn R Kant

When feeding from tomato (Solanum lycopersicum), the generalist spider mite Tetranychus urticae induces jasmonate (JA)- and salicylate (SA)-regulated defense responses that hamper its performance. The related T. evansi, a Solanaceae-specialist, suppresses these defenses, thereby upholding a high performance. On a shared leaf, T. urticae can be facilitated by T. evansi, likely via suppression of...

2010
GUO-QING LI

Tetranychid mites are serious agricultural pests. Identification of species in the Tetranychidae is hampered by their close morphological similarities, especially for species within the genus Tetranychus. In this study, we examined the relationships of nine agriculturally important species in the Tetranychidae from China based on mitochondrial (cytochrome c oxidase subunit 1) and nuclear (inter...

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