scholarly journals Toxicity and Biological Activity of Five Plant Extracts to the Two-Spotted Spider Mite, Teteunychus urticae and Predatory Mite, Amblyseius swirskii (Tetranychidae: Phlytoseiidea

2014 ◽  
Vol 8 (2) ◽  
pp. 49-56
Author(s):  
Safaa Abo-Taka ◽  
M. Sweelam ◽  
H. Heikal ◽  
Imam Walash
Keyword(s):  
Biological Activity ◽  
Plant Extracts ◽  
Spider Mite ◽  
Predatory Mite ◽  
Amblyseius Swirskii ◽  
Two Spotted Spider Mite

scholarly journals Effect of biological control against generalist pests (insect and mite) on egg plant (solanum melongеna) field

2019 ◽  
Vol 26 (01) ◽  
pp. 125-134
Author(s):  
Altantsesteg Z ◽  
Oyungerel J ◽  
Undarmaa D
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Predatory Mites ◽  
Predatory Mite ◽  
Control Plot ◽  
T Test ◽  
Amblyseius Swirskii ◽  
Neem Oil ◽  
Egg Plant ◽  
Two Spotted Spider Mite

We conducted this study on the “Black Beauty” variety from Russia, which was planted in a 120 sqrm greenhouse in the Agropark Center of the Mongolian University of Life Sciences in 2017. During vegetation period of egg plant were occurred the polyphagous insect pests such as two spotted spider mite (Tetranychus urticae), тrips (Thripidaes.sp), peach aphid (Myzodes persicae) and caused a injury at 1-2 rate.  For controlling these arthropod pests, we have used 4 different  treatments as А-(predatory mites- Phytoseilus persimilis, Amblyseius swirskii) ), B- (Neem oil), C- (Predators+Nеем oil), D-BEB (LC) 2% as comparing to control plot. In calculating the effectiveness of treatments, А-(predatory mites- Phytoseilus persimilis, Amblyseius swirskii) -79.1%, B- (Neem oil)-73.7%, C- (Predators+Nеем oil)-85.5%, D-BEB (LC) 2% -83.1% as comparing to control plot were killed respectively. We have tested 4 different treatment including the predacious mite (Phytoseiulus persimilis) to control  a two spotted spider mite (TSSM)-Tetranychus urticae) and A.swirskii against trips on the eggplant field . The treatments have been included A (predatory mite alone at 1:5 ratio), B (P+N (predatory mite at 1:5 ratio+Neem oil), C-neem oil alone), LC+BEB 2% and control plots with 4 replications. We have assessed the efficacy of each control treatment, and the B ( predatory mite+neem oil) treatment has reduced TSSM densities at most. These treatments for controlling the pests was  increased the eggplant yield 3.8-36.4% per sqm  area comparing to control plots. There was observed a differences between yield of  control and treatment plots and observed as A plots  (t=2.19, d.f.=174, p≥0,29), B plots  (t=0.88, d.f.=174, p≥0,37),C  plots  (t=8.8, d.f.=174, p≥3.78) as shown on the result of T-test analysis of SPSS.   Цэсийн (solanum melongеna) талбайд тархсан үе хөлтөн хөнөөлт организм (шавж, хачиг), тэдгээртэй тэмцэх биологийн аргын үр нөлөөг судалсан дүн Хураангуй: Бид энэхүү судалгааны ажлыг 2017 онд ХААИС-ийн Агропарк Сургалт, судалгааны төв дэх  120 мкв нийлэг хальсан хүлэмжинд тариалсан цэсийн ОХУ-ын “Чёрная красавица” сорт дээр  гүйцэтгэв. Ургамал ургалтын хугацаанд цэсийн талбайд хоёр толбот шүлхий  хачиг(Tetranychus urticae), трипс (Thripidaes.sp), Тоорийн бөөс (Myzodes persicae) зэрэг үе  хөлтний хүрээний хөнөөлтэй, элдэв идэшт зүйлүүд давхцан гарч бүлгээр хөнөөл учруулж  байсан бөгөөд эдгээрийн эсрэг тэмцэх аргын А-(Ангуучин хачгууд- Phytoseilus persimilis,  Amblyseius swirskii) ), B - (неем тос), C- (Ангуучин+Nеем тос), D-BEB (LC) 2% зэрэг  хувилбаруудыг хяналттай (E) харьцуулан туршиж, үр дүнг тогтоолоо. Эдгээрээс тархалт,  хөнөөлийн хувьд трипс, хоёр толбот шүлхий хачиг нь зонхилон тархаж, цэсийн навчийг 1-2  баллаар гэмтээж байв. Туршилтанд хэрэглэсэн хувилбаруудаас А. Ангуучин фитосейлюс хачиг  \1:5\ хувилбар 79.1%, B. Neem тос /0.01% уусмал + Фитосейулус хачиг /1:5/ -85.5% буюу  хамгийн өндөр , C. Neem тос /0.01% уусмал/-73.7%, D. BEB (LC) 2% уусмал /Дархлааны  бэлдмэл/ 83.1% -иар хөнөөлт организмыг үхүүлсэн техник үр дүнг үзүүлэв.Тэмцэх аргын  хувилбаруудын ургац хяналтын дэвсгээс давсан бөгөөд A,B,C,D хувилбаруудын ургац 23.69-  29.66 kг-аар хяналтын(E)-аас илүү байгааг SPSS, T-test-ийн аргаар шинжилэхэд A хувилбар  (t=2.19, d.f.=174, p≥0,29), B хувилбар (t=0.88, d.f.=174, p≥0,37),C хувилбар (t=8.8, d.f.=174,  p≥3.78) байгаа нь хувилбаруудын ургац хяналтын хувилбараас бодит зөрүүтэйг харуулж  байна. Түлхүүр үг: Хүлэмж, шүлхий хачиг, ангуучин хачиг, биологийн хамгаалал

The pathogenicity of entomopathogenic fungus Acremonium hansfordii to two-spotted spider mite, Tetranychus urticae and predatory mite Neoseiulus barkeri

2018 ◽  
Vol 23 (11) ◽  
pp. 2173
Author(s):  
Su-Qin Shang ◽  
Yao-Nian Chen ◽  
Ying-Lu Bai
Keyword(s):  
Tetranychus Urticae ◽  
Entomopathogenic Fungus ◽  
Spider Mite ◽  
Crop Yields ◽  
Predatory Mite ◽  
Experimental Conditions ◽  
Neoseiulus Barkeri ◽  
Preoviposition Period ◽  
Two Spotted Spider Mite ◽  
F1 Generation

The two-spotted spider mite, Tetranychus urticae, is an important mite pest worldwide. It often leads to reduced crop yields or poor marketability of the produce and has already developed resistance to many acaricides. In this study, the pathogenicity of the entomopathogenic fungus (EPF), Acremonium hansfordii, to T. urticae and its side effects on the predatory mite Neoseiulus barkeri were compared. The toxicity of A. hansfordii was evaluated on T. urticae at 1.0×104, 1.0×106, 1.0×108 conidia/mL concentrations and predatory mite N. barkeri at 1.0×108 conidia/mL under experimental conditions at 25±1°C, 75±5% RH and 16L: 8D photoperiod. The effects of EPF on the development of the F0 and F1 generation of predatory mites were also assessed at 1.0×108 conidia/mL concentration. The results showed that the corrected mortality of T. urticae at three tested concentrations were 36.67%, 53.67% and 66.33% within 11d, and the median lethal time were 14.39 d, 9.84d and 7.99d, respectively. The corrected mortality of N. barkeri was only 3.9% after 11d at 1×108 conidia/mL concentration. Some hyphae of A. hansfordii were detected on the surface of treated T. urticae but not on N. barkeri body after 7d. After N. barkeri females were treated with 1.0×108 conidia/mL, the preoviposition period of the F0 generation was prolonged 1.56 times and the other life history parameters have no significant differences; similar patterns were also shown in the F1 generation. A. hansfordii showed strong pathogenicity against T. urticae but did not significantly adversely influence N. barkeri. Therefore, the combination of A. hansfordii and N. barkeri has the potential to be used for the control of T. urticae in the future. 

scholarly journals Bioactivity of Indigenous Medicinal Plants against the Two-Spotted Spider Mite, Tetranychus urticae

2017 ◽  
Vol 9 (7) ◽  
pp. 123 ◽  
Author(s):  
E. Abou-Fakhr Hammad ◽  
M. Akkary ◽  
N. Saliba ◽  
M. Farran ◽  
S. Talhouk
Keyword(s):  
Tetranychus Urticae ◽  
Plant Species ◽  
Plant Extracts ◽  
Spider Mite ◽  
Reference Sample ◽  
Acaricidal Activity ◽  
Aqueous Extracts ◽  
Methanol Extracts ◽  
Whole Plant ◽  
Two Spotted Spider Mite

Forty two methanol extracts and 12 aqueous extracts of 29 indigenous medicinal plant species were tested for their acaricidal bioactivity against the two spotted spider mite, Tetranychus urticae adults at the laboratory. Fourteen methanol plant extracts caused significant mortality in mites. This is the first report for the potential effect on survival of mites for 27 tested endemic plant species. Methanol whole plant extracts (WPEs) of Lotus carmeli, Alchemilla diademata, Eryngium deserlorum and aqueous fruit extracts (FrEs) of Melia azedarach caused toxic effects against the adult mites in the range of 41-46% mortality. The methanol WPE of L. carmeli and the aqueous FrE of M. azedarach (1:5) caused the highest mite mortality of 43.55% and 45.55%, respectively and each was used as reference sample for potential acaricidal activity in the methanol and aqueous treatment groups. The latter extract was not significantly different in its effect from aqueous extracts of M. azedarach leaf extract (LE) and Achillea damascena WPE. Methanol extracts of Salvia rubifolia flowers and Calendula palestina FrE were found to be more active against the adult mite than their extracts of other plant parts as leaves and flowers, respectively. The former two extracts, flower extracts of Anthemis scariosa, Echinops gaillardoti, Nepeta curviflora, and Ranunculus cuneatus, leaves and stems extract of An. scariosa and WPEs of Melissa inodora, Ranunuculus myosuroides, Origanum libanoticum and Ac. damascena were found to be comparable in their acaricidal activity to that of the whole plant extract of L. carmeli. Thus, these bioactive extracts of some local plant species can cause toxicity to adult T. urticae mites and consequently could be an alternative control for mite pests.

Age-specific functional response and predation rate of Amblyseius swirskii (Phytoseiidae) on two-spotted spider mite

2017 ◽  
Vol 22 (2) ◽  
pp. 159 ◽  
Author(s):  
Yaghoub Fathipour ◽  
Maryam Karimi ◽  
Azadeh Farazmand ◽  
Ali Asghar Talebi
Keyword(s):  
Functional Response ◽  
Spider Mite ◽  
Biological Control Agent ◽  
Handling Time ◽  
Predation Rate ◽  
Control Agent ◽  
Type Ii ◽  
Amblyseius Swirskii ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch

The lifetime functional response and predation rate of Amblyseius swirskii Athias-Henriot on eggs of the two-spotted spider mite, Tetranychus urticae Koch were determined under laboratory conditions using cucumber leaf discs. Densities of 2, 4, 8, 16, 32, 64 and 128 prey were offered to 3, 4, 5, 6, 7, 12, 17, 22 and 27-day-old A. swirskii individuals. Based on the logistic regression, the functional response of twelve-day-old A. swirskii was type III, while the other ages showed type II. The Rogers model was used to estimate searching efficiency (a) and handling time (Th). The longest handling time (1.387±0.315 h) was observed in the protonymphal stage, while the shortest handling time and highest maximum attack rate (T/Th) were estimated at the age of seven-days (0.396±0.057 h and 60.67 prey/day, respectively). In the functional response experiments, results of the highest prey density used (128 eggs) showed that the highest number of prey consumed by A. swirskii individuals aged twelve and seventeen-days old (35.6 and 43.1 eggs, respectively). It is concluded that A. swirskii could be an efficient biological control agent of T. urticae at the middle-age of its life and at higher prey densities. 

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