scholarly journals Control of the Two-Spotted Spider Mite on Strawberry by Combination of Neoseiulus californicus (McGregor) Release and Propylene Glycol Monolaurate Spraying and the Role of the Flower as an Alternative Habitat during Low Two-Spotted Spider Mite Density

2014 ◽  
Vol 58 (1) ◽  
pp. 39-45
Author(s):  
Yuya Ito ◽  
Kotaro Mori ◽  
Kohji Hirano
Keyword(s):  
Propylene Glycol ◽  
Spider Mite ◽  
Neoseiulus Californicus ◽  
Alternative Habitat ◽  
Mite Density ◽  
Two Spotted Spider Mite

scholarly journals The role of phenols in the influence of herbal extracts from Salvia officinalis L. and Matricaria chamomilla L. on two-spotted spider mite Tetranychus urticae Koch

2011 ◽  
Vol 48 (2) ◽  
pp. 193-205 ◽  
Author(s):  
Anna Tomczyk ◽  
Magdalena Suszko
Keyword(s):  
Phenolic Compounds ◽  
Toxic Effect ◽  
Tetranychus Urticae ◽  
Spider Mite ◽  
Spider Mites ◽  
Salvia Officinalis ◽  
Herbal Extracts ◽  
Matricaria Chamomilla ◽  
Two Spotted Spider Mite

The role of phenols in the influence of herbal extracts fromSalvia officinalisL. andMatricaria chamomillaL. on two-spotted spider miteTetranychus urticaeKochExtracts prepared from 2 medicinal herbs (common sageSalvia officinalisL. and German chamomileMatricaria chamomillaL.) were used in this study for biological control of spider mites. Their effect on mortality, fecundity, and development ofTetranychus urticaeKoch on English ivy (Hedera helixL.) was studied under laboratory and greenhouse conditions. The extracts were prepared by soaking freshSalvialeaves or dryMatricariaflowers in ethanol for 24 h, followed by evaporation, and finally suspension of the pellets in water. Full extracts and extracts without phenols were tested. TheSalviaextracts had a higher acaricidal activity thanMatricariaextracts, but the toxicity of both extracts to spider mite eggs was low. The toxic effect of fullSalviaextracts on larval stages and females ofT. urticaewas evident. More than 50% of larvae and females were killed by this treatment in 4 days. Besides, total fecundity of survived females was evidently lower. Mortality and low fecundity after fullSalviaextract application decreased the spider mite population by 76%. The toxicity ofSalviaextracts after removal of phenols strongly declined, so the negative effect of the fullSalviaextract on spider mites was connected with a high concentration of phenolic compounds. The toxic effect ofMatricariaextracts in all tests was much lower and no evident role of phenolic compounds in its extracts was observed.

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.

scholarly journals Results of the Single Release Efficacy of the Predatory Mite Neoseiulus californicus (McGregor) against the Two-Spotted Spider Mite (Tetranychus urticae Koch) on a Hop Plantation

2020 ◽  
Vol 11 (1) ◽  
pp. 118
Author(s):  
Matej Vidrih ◽  
Anja Turnšek ◽  
Magda Rak Cizej ◽  
Tanja Bohinc ◽  
Stanislav Trdan
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Biological Control Agent ◽  
Spider Mites ◽  
Predatory Mite ◽  
Control Agent ◽  
Neoseiulus Californicus ◽  
Future Research ◽  
Starting Point ◽  
Two Spotted Spider Mite

In 2015, we studied the efficiency of the predatory mite Neoseiulus californicus (McGregor) for suppression of the two-spotted spider mite Tetranychus urticae in a field experiment at a hop plantation. We randomly arranged four treatments in a three-block experiment. Fungicides were used in all treatments; insecticides were used in all treatments except the predatory mite treatment and acaricides were used in only two treatments. A single inundative release of the mite N. californicus was carried out on 4 July. On four different dates (10 June, 17 July, 29 July and 9 August), we counted the eggs and the mobile stages (larvae, nymphs and adults) of the two-spotted spider mite in all four treatments. In the treatment with the predatory mite, we established the fewest eggs and mobile stages of T. urticae 14 days after the release of the predator. The selected acaricides in our research acted in a primarily ovicidal manner, but we did not detect satisfactory effects on the mobile stages of the two-spotted spider mite. This result suggests the emergence of resistance of two-spotted spider mites to the acaricides hexythiazox and abamectin. Our research established comparable effects of the predatory mite N. californicus and acaricides, and further improvement of the efficiency would require release of the natural enemy into a hop plantation in mid-June, followed by a second release three weeks later. The costs of acaricide use in our experiment were from 12.7-fold (two sprayings of hexythiazox, and a single spraying with abamectin) to 17.8-fold (single treatments of hexythiazox and abamectin) lower than those of a single release of the biological control agent in question. The results of our study represent a starting point for future research, which could achieve satisfactory results in suppressing two-spotted spider mites on a hop plantation by repeated use of the predatory mite N. californicus.

How pollen supplementary diet affect life table and predation capacity of Neoseiulus californicus on two-spotted spider mite 

2017 ◽  
Vol 22 (1) ◽  
pp. 135 ◽  
Author(s):  
Mostafa Khanamani ◽  
Yaghoub Fathipour ◽  
Ali Asghar Talebi ◽  
Mohammad Mehrabadi
Keyword(s):  
Life Table ◽  
Spider Mite ◽  
The Other ◽  
Neoseiulus Californicus ◽  
Intrinsic Rate Of Increase ◽  
Maize Pollen ◽  
Rate Of Increase ◽  
Pollen Types ◽  
Predation Capacity ◽  
Two Spotted Spider Mite

Supply of alternative food is generally thought to enhance the performance of generalist predatory mites. The effects of three different pollens (maize, date palm, and bee-collected pollen) as supplementary diets on the life table and predation capacity of Neoseiulus californicus McGregor (Acari: Phytoseiidae) on two-spotted spider mite (TSSM) were determined. Total fecundity on TSSM in the presence of the pollen was significantly higher than those on the pollen alone. The intrinsic rate of increase (r) on TSSM in the presence of the maize pollen (0.1409 day-1) was significantly higher than those on TSSM (as control) and/or the other diets. In addition, N. californicus consumed fewer prey in the presence of the maize pollen than the other pollen types. However, lower prey consumption in the presence of this pollen was compensated by an increase in reproduction and survive. In conclusion, the effectiveness of N. californicus on TSSM in the presence of the maize pollen was superior to the other pollens. However, although the other pollen types had no obvious positive effect on the performance of N. californicus, they might increase long-term persistence of the predator-prey system. 

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