scholarly journals Efficacy of the combination of Neoseiulus californicus (McGregor) and propylene glycol fatty acid monoester emulsifiable concentrate (Akaritouch) in the control of the two-spotted spider mite, Tetranychus urticae Koch

2020 ◽  
Vol 62 (0) ◽  
pp. 55-60
Author(s):  
Koichi Yamaguchi ◽  
Kotaro Mori
Keyword(s):  
Fatty Acid ◽  
Propylene Glycol ◽  
Tetranychus Urticae ◽  
Spider Mite ◽  
Neoseiulus Californicus ◽  
Emulsifiable Concentrate ◽  
Fatty Acid Monoester ◽  
Two Spotted Spider Mite

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.

scholarly journals Study of potential activity of clove oil 10 % emulsifiable concentrate formulation on Two-spotted spider Mite Tetranychus urticae Koch (Acari: Tetranychidae)

2021 ◽  
Vol 13 (4) ◽  
pp. 1414-1419
Author(s):  
Hisham I. Abd-Alla ◽  
Saad E. S. Hamouda
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Biological Activities ◽  
Clove Oil ◽  
Percent Inhibition ◽  
Emulsifiable Concentrate ◽  
Oil Formulation ◽  
Two Spotted Spider Mite ◽  
New Formulation ◽  
Physical And Chemical

Clove oil is reported to have a great range of biological activities against many species of pests; termites, cockroaches, aphids, weevils and moths, and many different usages such as perfume and food flavoring agent. This study aimed to determine the acaricidal activity of clove oil emulsifiable concentrate new formulation against two-spotted spider mites Tetranychus urticae. Clove oil was formulated as 10 % emulsifiable concentrate (EC). The new formula passed successfully all physical and chemical tests reported for emulsifiable concentrates. It was then tested biologically on the individuals of two-spotted spider mite T. urticae Koch (Acari: Tetranychidae) on two host plants beans and squash under laboratory conditions. In both cases, there were a direct relationship between the increase in the concentration of the formulation and the percentage of inhibition on the individuals of the two-spotted spider mite, after 72 hours of treatment, at concentrations of 20, 40, and 80 mg/ml the new formulation showed 10.30, 44.8, and 75 percent inhibition, respectively in case of beans, while squash at the same concentrations and for the same period of treatment showed 33.3, 40.7, and 51.9 percent inhibition, but the effect in case of beans was greater than that in case of squash as its EC50 value was lower than that in case of squash. In the case of the former, it was 39.81 mg/ml, whereas in the case of the latter, it was 79.43 mg/ml. Therefore, the new clove oil formulation can be used to combat the two-spotted spider mite.

Effects of lime sulfur on Neoseiulus californicus and Phytoseiulus macropilis , two naturally occurring enemies of the two‐spotted spider mite Tetranychus urticae

2019 ◽  
Vol 76 (3) ◽  
pp. 996-1003
Author(s):  
Henry E Vacacela Ajila ◽  
Eugênio E Oliveira ◽  
Felipe Lemos ◽  
Khalid Haddi ◽  
Felipe Colares ◽  
...  
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Neoseiulus Californicus ◽  
Naturally Occurring ◽  
Phytoseiulus Macropilis ◽  
Two Spotted Spider Mite
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