scholarly journals Influence of leaf pubescence on the behavior of the two-spotted spider mite (Tetranychus urticae) and the European red mite (Panonychus ulmi)

2013 ◽  
Vol 56 (1-2) ◽  
pp. 109-115 ◽  
Author(s):  
Wojciech Warabieda ◽  
Mike Solomon
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Mite Species ◽  
Panonychus Ulmi ◽  
Movement Behavior ◽  
Quick Method ◽  
Leaf Pubescence ◽  
European Red Mite ◽  
Stop Time ◽  
Two Spotted Spider Mite

Movement behavior of two mite species: two-spotted spider mite (Tetranychus urticae) and European red mite (Panonychus ulmi) on leaves of some apple cultivars (´Greensleeves´, ´Spartan' and SA 455-2 selection) with different density of pubescence was analysed. Assessment of the leaf pubescence density was performed using an originally developed quick method based on digital pubescence mage analysis. For P.ulmi, both stop time and average speed did not depend on kind of leaf. In contrary. T.urticae revealed higher movement activity on slight pubescent leaves compared to leaves with high leaf hair density.

ESTIMATING MITE POPULATIONS IN SOUTHERN OREGON PEAR ORCHARDS

1971 ◽  
Vol 103 (1) ◽  
pp. 67-71 ◽  
Author(s):  
P. H. Westigard ◽  
L. D. Calvin
Keyword(s):  
Sample Size ◽  
Coefficient Of Variation ◽  
Spider Mite ◽  
Sampling Methods ◽  
Mite Species ◽  
Panonychus Ulmi ◽  
Species Variation ◽  
European Red Mite ◽  
Mite Density ◽  
Two Spotted Spider Mite

AbstractStudies were conducted in southern Oregon pear orchards to develop sampling methods for assessment of mite abundance. Those species included in the investigation were the two-spotted spider mite, Tetranychus urticae Koch; European red mite, Panonychus ulmi (Koch); yellow spider mite, Eotetranychus carpini borealis (Ewing); and the predaceous phytoseiid Typhlodromus occidentalis Nesbitt.The results show that five leaves on one limb per tree are adequate to include representative numbers of the four mite species. Variation in mite densities between trees, even of the same variety, was quite high. The sample size (numbers of trees) required for assessing mite density can be calculated provided that an estimate of the coefficient of variation (S/X) is available.

POPULATION STUDIES OF PHYTOPHAGOUS MITES AND PREDATORS ON APPLE IN SOUTHWESTERN QUEBEC

1967 ◽  
Vol 99 (7) ◽  
pp. 771-778 ◽  
Author(s):  
B. Parent
Keyword(s):  
Spider Mite ◽  
Population Studies ◽  
Venturia Inaequalis ◽  
Apple Scab ◽  
Panonychus Ulmi ◽  
Similar Relationship ◽  
Ecological Studies ◽  
Phytophagous Mites ◽  
European Red Mite ◽  
Two Spotted Spider Mite

AbstractEcological studies, undertaken to determine the fluctuations of phytophagous mites and predators in apple orchards, were conducted in 1955, 1956, and 1957 at Rougemont, Que., in two plots sprayed only with fungicides for the control of apple scab, Venturia inaequalis (Cke) Wint., and in a third one sprayed, in addition to fungicides, with all insecticides needed for the control of destructive insects. Phytophagous mites were more numerous in the plot sprayed with insecticides than in plots sprayed only with fungicides, and densities of the mites in the latter plots were inversely proportional to densities of predators. A similar relationship existed in the insecticide plot between the amount of chemicals used and numbers of predators present. The principal mite predators were Typhlodromus rhenanus (Oudms.), most effective against the two-spotted spider mite, Tetranychus urticae Koch, and Mediolata mali (Ewing), most effective against the European red mite, Panonychus ulmi (Koch).

Sevin as a Systemic Miticide for the Pear Leaf Blister Mite, Eriophyes pyri (Pgst.) (Acarina: Eriophyidae)

1962 ◽  
Vol 94 (7) ◽  
pp. 680-686 ◽  
Author(s):  
C. V. G. Morgan ◽  
P. T. Yee ◽  
F. E. Brinton
Keyword(s):  
Spider Mite ◽  
Panonychus Ulmi ◽  
Insect Control ◽  
Predacious Mite ◽  
European Red Mite ◽  
Ornithonyssus Sylviarum ◽  
Northern Fowl Mite ◽  
Two Spotted Spider Mite

Sevin (1-naphthyl N-methylcarbamate) was first shown to have miticidal properties in 1957 when Allen et al. (1) found that it was moderately effective for the control oi the cyclamen mite, Steneotarsonmus pallidus (Banks), on strawberries. Subsequently it was demonstrated that Sevin would control the northern fowl mite, Ornithonyssus sylviarum (C. and F.) (7, 8, 9), suppress the brown mite, Bryobia arborea M. and A. (18), and the peach silver mite, Vasates cornutus (Banks) (18), and practically eliminate the predacious mite, Typhlodromus rhenanus Oudms. (18). It is not toxic to the European red mite, Panonychus ulmi (Koch) (18), the desert spider mite, Tetranychus desertorum Banks (4), and the two-spotted spider mite, Tetranychus telarius (L.) (6, 15); usually the use of Sevin for insect control will increase the numbers of these mites, and in this respect its effect is similar to that of DDT.

scholarly journals Gas Exchange Characteristics of Apple and Peach Leaves Infested by European Red Mite and Twospotted Spider Mite

1990 ◽  
Vol 115 (5) ◽  
pp. 757-761 ◽  
Author(s):  
Kendrick N. Mobley ◽  
Richard P. Marini
Keyword(s):  
Gas Exchange ◽  
Spider Mite ◽  
Prunus Persica ◽  
Leaf Gas Exchange ◽  
Net Photosynthesis ◽  
Mite Species ◽  
Panonychus Ulmi ◽  
Twospotted Spider Mite ◽  
European Red Mite ◽  
Twospotted Spider

Greenhouse-grown `Imperial Delicious' apple (Malus domestics Borkh.) and `Redhaven' peach (Prunus persica Batsch.) trees were inoculated during the summer with three densities of European red mite (ERM) (Panonychus ulmi Koch) and twospotted spider mite (TSM) (Tetranychus urticae Koch). As ERM- and TSM-days increased, net photosynthesis (Pn), transpiration (Tr), and total chlorophyll content (TCHL) of apple leaves decreased linearly. At similar densities, TSM was more damaging than ERM to apple leaf gas exchange. Water-use efficiency (WUE) of apple declined similarly with increasing mite-days for both mite species. Specific leaf weight (SLW) of apple increased with TSM-days. Pn, Tr, TCHL, and WUE of peach declined linearly with increasing ERM- and TSM-days, and the rates of decline were similar for both mite species. Mites did not affect peach SLW. These results indicate that greenhouse-grown peach is more tolerant than apple to mite feeding.

The two-spotted spider mite Tetranychus urticae Koch and the carmine spider mite Tetranychus cinnabarinus (Boisduval) in China mixed in their Wolbachia phylogenetic tree

Zootaxa ◽  
2006 ◽  
Vol 1165 (1) ◽  
pp. 33 ◽  
Author(s):  
LIN XIE ◽  
HUI MIAO ◽  
XIAO-YUE HONG
Keyword(s):  
Phylogenetic Tree ◽  
Tetranychus Urticae ◽  
Infection Rate ◽  
Spider Mite ◽  
Morphological Differentiation ◽  
Wolbachia Infection ◽  
Molecular Data ◽  
Mite Species ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch

Two closely-related species Tetranychus urticae Koch and T. cinnabarinus (Boisduval) are important pests in China causing great damage to agricultural crops. Morphological differentiation between these two spider mite species has been very difficult due to intraspecific variation among populations. Molecular data suggest they are two forms of one species. We approach this problem from a different angle, and attempt to differentiate between the two mites using Wolbachia symbionts, which may show co-evolutionary trends with their hosts. All of the 13 populations of T. urticae from China were found to be infected with Wolbachia, with the infection rate ranging from 2.5% to 85%. Among the 25 populations of T. cinnabarinus examined, seven populations (Shenyang, Yinchuan, Binzhou, Wei’xian, Minhang, Chibi and Gaoxiong) were not infected with Wolbachia, and the other 18 populations were infected, at an infection rate from 5% to 77.5%. No correlation was found between species of host plant and Wolbachia infection rate in either mite. Wolbachia wsp gene sequence analysis showed that there are two clades of Wolbachia from the spider mites. In the Con clade, three Wolbachia strains from T. cinnabarinus (red) in China were mixed with those from two T. urticae (green) populations from France. In Ori clade, two sub-clades were visible. In one sub-clade, fifteen Wolbachia strains from T. cinnabarinus (red) were mixed with eight T. urticae (green; six from China and two from USA and France). In another sub-clade, seven Wolbachia strains from Chinese T. urticae populations (green) were mixed with those from one French red form and five green forms from France, Australia and Japan. Therefore, T. urticae and T. cinnabarinus from China are mixed in the phylogenetic tree of their endosymbiont Wolbachia.

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