The widespread planting of corn genetically modified to produce Bacillus thuringiensis endotoxin has led to speculation that pollen from these fields might adversely affect nearby nontarget lepidopterans. A previous study of Bt corn engineered with Monsanto event 810 failed to detect an effect of pollen exposure on the black swallowtail, Papilio polyxenes, in either the field or the laboratory....

This paper reviews the development of pesticide resistance in Tetranychus cinnabarinus (Boisduval) and studies on the genetics and management of pesticide resistance in China. This mite has developed resistance to at least 25 pesticides in China. It first developed resistance to parathion and demeton. As early as 1962, the level of resistance to demeton in T. cinnabarinus reached 62 times, whic...

Predatory mites that belong to the Phytoseiidae family are one of the main natural enemies of phytophagous mites, thus allowing for their use as a biological control. Phytoseiulus macropilis (Banks, 1904) (Acari: Phytoseiidae) is among the main species of predatory mites used for this purpose. Tetranychus urticae Koch, 1836 (Acari: Tetranychidae) is considered to be one of the most important sp...

The two-spotted spider mite, Tetranychus urticae, causes damage to crops grown in northeast Brazil. adoption of biological control methods and curative (plant-based insecticides) is an essential practice for pest management agroecological systems. Therefore, the aim present study was investigate chemical properties, toxicity, ovicidal activity oils (EOs) from Lippia sidoides, Croton rhamnifolio...

Adequate distribution of natural enemies is necessary for successful augmentative biological control. In California greenhouse cut roses produced using the bent shoot system, the predatory mite Phytoseiulus persimils is widely used for control of the phytophagous mite Tetranychus urticae. One purported advantage of the bent shoot method is that the dense foliage of the lower canopy creates inte...

El uso excesivo de agroquímicos para nutrir y controlar plagas encultivo rosa (Rosa x hybrida) conlleva costos ambientales económicos, por lo que se buscan alternativas disminuir su utilización. objetivo la presente investigación fue obtener un compost elaborado con vegetales aportan silicio y, evaluar efecto en cuatro ciclos productivos cv. Freedom®, sobre incidencia araña roja (Tetranychus ur...

Phytoseiulus persimilis Athias-Henriot is an important biocontrol agent for controlling spider mites (Tetranychus spp). Rearing P. relatively expensive due to the need raise (e.g. Tetranychus urticae Koch), as prey, on live plants. Frozen eggs of T. can be easily stored and used a potential feed laboratory rearing persimilis. This study investigated performance frozen compared with fresh food U...

Digestive proteases of the phytophagous mite Tetranychus urticae have been characterised by comparing their activity in body and faecal extracts. Aspartyl, cathepsin B- and L-like and legumain activities were detected in both mite bodies and faeces, with a specific activity of aspartyl and cathepsin L-like proteases about 5- and 2-fold higher, respectively, in mite faeces than in bodies. In gen...