ABSTRACT Silicon is an inducer of plant resistance to arthropod pests, being a promising strategy for integrated management. The aim this study was evaluate the effect silicon on biological, reproductive and population aspects parental F1 generations two-spotted spider mite strawberry plants. Potassium silicate, nanosilica water were applied Two-spotted females confined leaf disks oviposition a...

the two spotted spider mite tetranychus urticae koch is one of the polyphagous pests of crops worldwide. due to undesirable effects of synthetic pesticides such as expression of resistance in mites, this research was conducted to achieve alternative safe compounds to environment. therefore, ovicidal activity of essential oils of eucalyptus salmonophloia f. muell and eucalyptus kingsmillii maide...

Under natural conditions, plants suffer different stresses simultaneously or in a sequential way. At present, the combined effect of biotic and abiotic stressors is one of the most important threats to crop production. Understanding how plants deal with the panoply of potential stresses affecting them is crucial to develop biotechnological tools to protect plants. As well as for drought stress,...

The experiment was conducted to study the effectiveness of four commonly used chemicals viz., deltamethrin, cypermethrin, malathion and sulphur against two-spotted spider mite (TSSM), Tetranychus urticae Koch on potted bean plants and on excised leaf discs. Mite population remained significantly lower in all treated plots except malathion treatment. The population of T. urticae differed signifi...

C1A plant cysteine proteases are synthesized as pre-pro-enzymes that need to be processed to become active by the pro-peptide claves off from its cognate enzyme. These pro-sequences play multifunctional roles including the capacity to specifically inhibit their own as well as other C1A protease activities from diverse origin. In this study, it is analysed the potential role of C1A pro-regions f...

Diapause is a common feature in several arthropod species that are subject to unfavorable growing seasons. The range of environmental cues that trigger the onset and termination of diapause, in addition to associated hormonal, biochemical, and molecular changes, have been studied extensively in recent years; however, such information is only available for a few insect species. Diapause and cold...

repeatability, (the consistency with which a given trait is expressed) of aggressiveness against prey (attack latency) in gravid females of the predatory mite neoseiulus californicus (mcgregor) was examined. in two experiments, prey - conspecific individuals, the onion thrips thrips tabaci (lindeman), and the two-spotted spider mite tetranychus urticae koch- were repeatedly offered in various n...

fourteen accessions and cultivars of lycopersicon spp. were studied to evaluate their resistance to two-spotted spider mite, tetranychus urticae koch, under laboratory and greenhouse conditions. in vitro studies were carried out using thumbtack and leaf disk bioassays. lycopersicon hirsutum and l. pennellii accessions supported more mites on the tack. the highest number of eggs (5.15 â± 0.48 eg...

Twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), and hop aphid, Phorodon humuli (Schrank) (Hemiptera: Aphididae), are the most important arthropod pests of hop (Humulus lupulus L.) in the Northern Hemisphere. A potential barrier for greater adoption of conservation biological control strategies for spider mites and hop aphid is the extensive use of fungicides for managem...

Dispersal and competition have both been suggested to drive variation in adaptability to a new environment, either positively or negatively. A simultaneous experimental test of both mechanisms is however lacking. Here, we experimentally investigate how population dynamics and local adaptation to a new host plant in a model species, the two-spotted spider mite (Tetranychus urticae), are affected...