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Presence and role of knockdown resistance in Anopheles species of Africa and the Mekong region Instituut voor Tropische Geneeskunde
Identification and functional characterization of a novel acetyl-CoA carboxylase mutation associated with ketoenol resistance in Bemisia tabaci Universiteit Gent
Insecticides of the tetronic/tetramic acid family (cyclic ketoenols) are widely used to control sucking pests such as whiteflies, aphids and mites. They act as inhibitors of acetyl-CoA carboxylase (ACC), a key enzyme for lipid biosynthesis across taxa. While it is well documented that plant ACCs targeted by herbicides have developed resistance associated with mutations at the carboxyltransferase (CT) domain, resistance to ketoenols in ...
Point mutations in the voltage-gated sodium channel gene associated with pyrethroid resistance in Iranian populations of the European red mite Panonychus ulmi Universiteit Gent
The European red mite Panonychus ulmi (Koch) is a major pest of apple trees worldwide and causes significant damage to apple orchards in Iran. Pyrethroid insecticides/acaricides, such as fenpropathrin and fenvalerate, are widely used to control P. ulmi, but their long-term use may lead to low efficacy. Earlier studies investigating pyrethroid resistance in closely related mites such as Tetranychus urticae revealed that pyrethroid resistance was ...
Knockdown resistance in Anopheles vagus, An. sinensis, An. paraliae and An. peditaeniatus populations of the Mekong region Instituut voor Tropische Geneeskunde
ABSTRACT: BACKGROUND: In the Mekong region (Vietnam, Cambodia and Laos), a large investigation was conducted to assess the susceptibility of Anopheles species against DDT and pyrethroids. In this study, the resistance status of the potential malaria vectors An. vagus, An. sinensis, An. paraliae and An. peditaeniatus was assessed. METHODS: Bioassays were performed on field collected unfed female mosquitoes using the standard WHO susceptibility ...
Over-expression in cis of the midgut P450 CYP392A16 contributes to abamectin resistance in Tetranychus urticae Universiteit Gent
Cytochrome P450 mediated metabolism is a well-known mechanism of insecticide resistance. However, to what extent qualitative or quantitative changes are responsible for increased metabolism, is not well understood. Increased expression of P450 genes is most often reported, but the underlying regulatory mechanisms remain widely unclear. In this study, we investigate CYP392A16, a P450 from the polyphagous and major agricultural pest Tetranychus ...
Resistance incidence and presence of resistance mutations in populations of Tetranychus urticae from vegetable crops in Turkey Universiteit Gent
Tetranychus urticae Koch is one of the most common and harmful pests in vegetable production areas. Similar to other countries, control of T. urticae is mainly based on acaricides in Turkey. However, T. urticae rapidly develops resistance and failures in chemical control have occurred frequently. The toxicity of various acaricides was investigated in ten T. urticae populations collected from vegetable crops in Turkey. In addition, populations ...
Characterization of abamectin resistance in Iranian populations of European red mite, Panonychus ulmi Koch (Acari: Tetranychidae) Universiteit Gent
The European red mite, Panonychus ulmi Koch is one of the most important pests in apple orchards and was introduced to Iran by apple seedlings from Europe. The insecticide/acaricide abamectin for example has been used extensively against P. ulmi and some other pests in apple orchards. To evaluate abamectin resistance in field-collected populations of P. ulmi, 12 populations were collected from commercial apple orchards of East Azarbaijan, West ...
High gamma-aminobutyric acid contents Involved in abamectin resistance and predation, an interesting phenomenon in spider mites Universiteit Gent
Abamectin has been widely used as an insecticide/acaricide for more than 30 years because of its superior bioactivity. Recently, an interesting phenomenon was identified in the carmine spider mite, Tetranychus cinnabarinus, an important pest in agriculture. The gamma aminobutyric acid (GABA) contents in a laboratory abamectin resistant strain of T. cinnabarinus (AbR) were significantly increased. Decreases in activity and mRNA expression of GABA ...