Acute and non-lethal effects of coconut oil on predatory mite Typhlodromus ornatus (Acari: Phytoseiidae)

2018 ◽  
Vol 23 (7) ◽  
pp. 1333 ◽  
Author(s):  
Giselle Freitas ◽  
Maria Clezia Santos ◽  
Vanessa Lira ◽  
Andreia Galvão ◽  
Eugenio Oliveira ◽  
...  
Keyword(s):  
Side Effects ◽  
Functional Response ◽  
Vegetable Oils ◽  
Natural Enemy ◽  
Coconut Oil ◽  
Predatory Mites ◽  
Predatory Mite ◽  
Aceria Guerreronis ◽  
Lethal Effects ◽  
Coconut Mite

Typhlodromus (Anthoseius) ornatus Denmark & Muma (Acari: Phytoseiidae) is one of the predatory mites associated with the coconut mite Aceria guerreronis (Acari: Eriophyidae), a serious coconut pest in Africa, Asia and America. Vegetable oils such as coconut oil have been shown to efficiently control A. guerreronis, however their side effects on predatory mites remain poorly investigated. Here, we evaluated the lethal and non-lethal effects of coconut oil on repellence and functional response of the predatory mite T. ornatus, a natural enemy of A. guerreronis. Based on LC50 estimates, coconut oil was over 6-fold less toxic to T. ornatusthan to its prey, A. guerreronis. Additional repellence and predation bioassays show that the coconut oil neither repels nor interferes in the functional response of T. ornatus preying upon A. guerreronis. According to our selectivity approach, the coconut oil is compatible with the predatory mite T. ornatus. 

scholarly journals Functional and numerical responses of the predatory mite Amblyseius aerialis (Acari: Phytoseiidae) to Aceria guerreronis (Acari: Eriophyidae)

Acarologia ◽  
2022 ◽  
Vol 62 (1) ◽  
pp. 27-35
Author(s):  
Camila Tavares Ferreira ◽  
Aloyséia Cristina da Silva Noronha ◽  
Eduardo Pereira Souza Neto ◽  
Raimundo Parente De Oliveira ◽  
Paulo Manoel Pontes Lins ◽  
...  
Keyword(s):  
Cocos Nucifera ◽  
Predatory Mite ◽  
Food Sources ◽  
Physical Barrier ◽  
Aceria Guerreronis ◽  
Coconut Tree ◽  
Coconut Mite ◽  
The Mean ◽  
Pest Mite ◽  
Cocos Nucifera L

The coconut mite, Aceria guerreronis Keifer, is one of the main pests of the coconut tree (Cocos nucifera L.) worldwide. Its control is mainly based on the use of acaricides. However, due to the habitat of this pest mite, which is protected by fruit bracts that act as a physical barrier, chemical control is often inefficient. Thus, natural enemies have been studied as an alternative to acaricides. We evaluated the functional and numerical responses of Amblyseius aerialis (Muma) to increasing densities of A. guerreronis (40, 80, 160, 240 and 360) and additionally the oviposition rates of the phytoseiid A. aerialis over 11 days on different food sources: coconut pollen, A. guerreronis and a mix of pollen and A. guerreronis. Our results showed that Amblyseius aerialis showed a type III functional response, where prey consumption increasing as the density of A. guerreronis increased, with a maximum consumption of up to 175 prey per predator. All the prey densities allowed female oviposition. The number of eggs laid by A. aerialis increased with increasing prey density and stabilized between 240 and 360 A. guerreronis individuals, with an average oviposition of 1.7 eggs/female. Furthermore, our results showed that all the food sources (coconut pollen, A. guerreronis and a mix of pollen and A. guerreronis) supported oviposition. The mean oviposition was approximately 1.5 eggs/female on all the food sources. Our study suggests that A. aerialis can be effective in the biological control of A. guerreronis. However, further studies are needed to investigate whether A. aerialis can explore the habitat of A. guerreronis and if that prey can support the development of immature stages and the reproduction of A. aerialis.

Bioactivity of cottonseed oil against the coconut mite Aceria guerreronis (Acari: Eriophyidae) and side effects on Typhlodromus ornatus (Acari: Phytoseiidae)

2017 ◽  
Vol 22 (7) ◽  
pp. 1037 ◽  
Author(s):  
Adenir Teodoro ◽  
Maria de Jesus Sousa Silva ◽  
José Guedes Sena Filho ◽  
Eugenio Oliveira ◽  
Andréia Galvão ◽  
...  
Keyword(s):  
Side Effects ◽  
Human Health ◽  
Environmental Contamination ◽  
Chemical Control ◽  
Pest Resistance ◽  
Cottonseed Oil ◽  
Aceria Guerreronis ◽  
Coconut Mite ◽  
Naturally Occurring ◽  
Major Pest

The coconut mite, Aceria guerreronis Keifer (Acari: Eriophyidae), is a major pest of coconut plantations. In Brazil, the control of A. guerreronis, when accomplished, is heavily dependent on applications of conventional acaricides, which further increases the risks associated with pest resistance, hazards to human health and environmental contamination. Therefore, the development of alternatives to the chemical control concerns outlined above is urgently needed. Here, we assessed the composition, toxicity and repellent activities of cottonseed oil to A. guerreronis and its naturally occurring predator Typhlodromus ornatus Denmark & Muma (Acari: Phytoseiidae). Our results revealed that the major compounds in cottonseed oil were linoleic and oleic acids, which have been shown to be bioactive against pests. Concentration-mortality bioassays revealed that A. guerreronis (LC50 = 0.65 μL/cm2) was more susceptible to cottonseed oil than its predator (LC50 = 5.11 μL/cm2). Similarly, as demonstrated for the conventional acaricides (i.e., abamectin, azadirachtin, espirodiclofen, and fenpyroximate), cottonseed oil was shown to repel A. guerreronis and its predator. Overall, our findings support the use of cottonseed oil as a desirable tool to be integrated in management programs aimed at controlling A. guerreronis.

A new tray-type arena to mass rear Neoseiulus baraki, a predatory mite of coconut mite, Aceria guerreronis in the laboratory

2010 ◽  
Vol 29 (6) ◽  
pp. 556-560 ◽  
Author(s):  
N.S. Aratchige ◽  
L.C.P. Fernando ◽  
P.H.P.R. de Silva ◽  
K.F.G. Perera ◽  
C.S. Hettiarachchi ◽  
...  
Keyword(s):  
Predatory Mite ◽  
Aceria Guerreronis ◽  
Mass Rear ◽  
Coconut Mite ◽  
Neoseiulus Baraki

Evidence for suppressing coconut mite, Aceria guerreronis by inundative release of the predatory mite, Neoseiulus baraki

2010 ◽  
Vol 53 (1) ◽  
pp. 108-111 ◽  
Author(s):  
L.C.P. Fernando ◽  
K.P. Waidyarathne ◽  
K.F.G. Perera ◽  
P.H.P.R. De Silva
Keyword(s):  
Predatory Mite ◽  
Aceria Guerreronis ◽  
Inundative Release ◽  
Coconut Mite ◽  
Neoseiulus Baraki

scholarly journals Toxicity of vegetable oils to the coconut mite Aceria guerreronis and selectivity against the predator Neoseiulus baraki

2017 ◽  
Vol 72 (1) ◽  
pp. 23-34 ◽  
Author(s):  
Natália N. F. C. Oliveira ◽  
Andreia S. Galvão ◽  
Ester A. Amaral ◽  
Auderes W. O. Santos ◽  
José G. Sena-Filho ◽  
...  
Keyword(s):  
Vegetable Oils ◽  
Aceria Guerreronis ◽  
Coconut Mite ◽  
Neoseiulus Baraki

Effects of Virgin Coconut Oil as Adjunct Therapy in the Treatment of Allergic Rhinitis

2016 ◽  
Vol 1 (1) ◽  
pp. 22
Author(s):  
Nazli Zainuddin ◽  
Nurul Azira Mohd Shah ◽  
Rosdan Salim
Keyword(s):  
Allergic Rhinitis ◽  
Side Effects ◽  
Coconut Oil ◽  
Test Group ◽  
Nasal Symptom ◽  
Control Group ◽  
Virgin Coconut Oil ◽  
Control Groups ◽  
Significant Difference ◽  
And Control

Introduction: The role of virgin coconut oil in the treatment of allergic rhinitis is controversial. Thus, the aim of the present study is to determine the effects of virgin coconut oil ingestion, in addition to standard medications, on allergic rhinitis. We also studied the side effects of consumption of virgin coconut oil. Methods: Fifty two subjects were equally divided into test and control groups. All subjects received a daily dose of 10mg of loratadine for 28 days. The test group was given 10ml of virgin coconut oil three times a day in addition to loratadine. The symptoms of allergic rhinitis were scored at the beginning and end of the study. Results:, the symptom score were divided into nasal and non-nasal symptom scores. Sneezing score showed a significant difference, however the score was more in control group than test group, indicating that improvement in symptom was more in control group. The rest of the nasal symptom and non-nasal symptom score showed no significant difference between test and control groups. Approximately 58% of the test subjects developed side effects from consumption of virgin coconut oil, mainly gastrointestinal side effects. Conclusion: In the present study, ingestion of virgin coconut oil does not improve the overall and individual symptoms of allergic rhinitis, furthermore it has side effects.

What habitat does spiny snout mite occupy in Tasmania

2015 ◽  
Vol 68 ◽  
pp. 446-446
Author(s):  
D.J. Wilson ◽  
P.J. Gerard
Keyword(s):  
New Zealand ◽  
Sand Dune ◽  
Biocontrol Agent ◽  
Predatory Mites ◽  
Mite Species ◽  
Predatory Mite ◽  
Habitat Specificity ◽  
Nontarget Organisms ◽  
Flea Control ◽  
Potential Biocontrol Agent

Spiny snout mite (Neomolgus capillatus) is a potential biocontrol agent for clover flea (Sminthurus viridis) a white clover pest on dairy farms in warmer and wetter parts of New Zealand In the 1990s this mite was introduced from Brittany France into Tasmania for clover flea control Results during the release programme were highly promising and subsequent anecdotal farmer reports indicate widespread decreases in damage As N capillatus is a predatory mite and already known to attack nontarget organisms habitat specificity will determine whether it could be introduced into New Zealand without risk to native insects To assess this pastures on nine of the original Tasmanian release farms and adjacent nontarget habitats ranging from bush wetlands eucalypt stands to sand dune country were sampled in April 2014 Litter samples were collected heat extracted and mite species identified Neomolgus capillatus was found at effective densities in pastures that had good clover cover Where present it displaced Bdellodes spp mites that are ineffective against clover flea No N capillatus were found in the nontarget habitats all of which lacked clover and contained other predatory mites including Bdellodes spp Therefore the preference by N capillatus for lush pastures makes it an excellent prospect for introduction as a biocontrol agent into clover flea prone regions of New Zealand

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