two-spotted spider mite, tetranychus urticae koch. is one of the most harmful pest of common bean in most areas of iran, including lorestan province. the appropriate unit and universe sampling of mite population were investigated in common bean fields in borujerd, dorud and azna in 2008. the results showed that samples should be taken from top, middle and bottom of the plant height. in addition...

two-spotted spider mite, tetranychus urticae koch (acari: tetranychidae), is one of the most injurious pests of fruits, vegetables and ornamental plants worldwide, both outdoor and indoors. currently the main method of control of this pest is through application of pesticides which is mostly accompanied by the resistance of the pest against pesticide(s). the resurgence of resistant mite populat...

The present study deals with the side effect of four entomopathogenic fungi EPF, Metarhizium anisoplia (Metchnikoff), Beauveria bassiana (Balsamo), Paceliomyces fumosoroseus(Vassiljevsky) and Cladosporium cladosporiodes (Fresen), which used mainly against insect pests spider mites, on phytoseiid predatory mite, Cydnoseius negevi(Swirski Amitai) in laboratory.  Spore suspensions LC50 (1x106=106 ...

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...

Arthropod pests are among the biggest problems faced in tomato production worldwide. To overcome losses caused by these pests, one of most sustainable and economical strategies is use resistance introgressed from wild species. We aimed to develop BC3F2 genotypes with high levels zingiberene (ZGB) whitefly (Bemisia tabaci biotype B), South American pinworm (Tuta absoluta), two-spotted spider mit...

Abstract The efficiency of Jasmonic acid concentrations 0, 5, 50 and 100μM was examined mortality adult female nymphs the two-spotted spider mite Tetranychus urticae fed on leaves over four time intervals 12, 24, 36 48 hours. results showed significant effect treatments corrected ratios for both stages, as well interaction variety, concentration time. In general, indicated increase with period....

Tetranychus urticae Koch, is known as a two-spotted spider mite and the most obtrusive polyphagous non-insect pest that causes havoc on horticultural crops. Cucumber cultivation threatened by variety of infestations, among which mites cause damage to crop. The efficiency six different chemical acaricides against T. in cucumber grown polyhouse was examined. results acaricide evaluation trial rev...

Spider mites, a cosmopolitan pest of agricultural and landscape plants, thrive under hot and dry conditions, which could become more frequent and extreme due to climate change. Recent work has shown that neonicotinoids, a widely used class of systemic insecticides that have come under scrutiny for non-target effects, can elevate spider mite populations. Both water-stress and neonicotinoids inde...

Understanding the impact of a pest species on a particular crop is critical for the success of a pest management program. Field studies were conducted to determine the effect of the twospotted spider mite, Tetranychus urticae Koch, on marketable yield of strawberries during the 2008/2009 and 2009/2010 growing seasons. Low, medium, and high mite infestation levels were established by initial ino...