Bioassays with diatomaceous earth formulations: Effect of species co-occurrence, size of vials and application technique

Kavallieratos, Nickolas G.; Athanassiou, Christos G.; Mpassoukou, Argyro E.; Mpakou, Flora D.; Tomanović, Željko; Manessioti, Theodora B.; Papadopoulou, Smaragdi Ch.

doi:10.1016/j.cropro.2012.06.016

Cited by 13 publications

(5 citation statements)

References 33 publications

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“…Research groups from Greece and the USA published the highest number of these papers, mainly reporting on laboratory research of DE effectiveness against stored product insect pests with extensive reference sections (Arthur, 2003;Atahanassiou et al, 2005;Kavallieratos et al, 2012). Although different and often completely contradictory results were reported, it is possible to draw a general conclusion on the sensitivity of stored product insects to DE.…”

Section: Background Of Diatomaceous Earth Use and Resultsmentioning

confidence: 99%

Diatomaceous earths: Natural insecticides

Korunić¹

2013

Pesticidi i fitomedicina

169

221

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SUMMARYThe regulatory issues for diatomaceous earth (DE) cover three fields: consumer safety, worker safety, and proof of efficacy against pests. For consumer safety, regulatory issues are similar to those for other additives, and a principal benefit of DEs is their removal by normal processing methods. For worker safety, regulatory issues are similar to those for other dusts, such as lime. The proof of potential insecticide values of DE may be assessed by using the analysis of physical and chemical properties of DE and its effect on grain properties and the proof of efficacy may be regulated by bioassay of standard design. Integrated pest management (IPM), a knowledge-based system, is rapidly providing a framework to reduce dependence on synthetic chemical pesticides. The main principle of post-harvest IPM is to prevent problems rather than to react to them. The specific curative measures using synthetic pesticides should be applied only when infestation occurs. DE and enhanced diatomaceous earth (EDE) formulations hold significant promise to increase the effectiveness and broaden the adoption of IPM strategies, thereby reducing the need for synthetic pesticides. By incorporating DE in an effective IPM program, grain is protected against infestation, loss caused by insects is prevented and grain quality is maintained until the grain is processed. Cases study data on the use of DE for commodity and structural treatment show that DE is already a practical alternative to synthetic pesticides in some applications.

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Section: Background Of Diatomaceous Earth Use and Resultsmentioning

confidence: 99%

Diatomaceous earths: Natural insecticides

Korunić¹

2013

Pesticidi i fitomedicina

169

221

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“…Particle size is highly associated with the insecticidal efficacy of inert dusts. Many authors have emphasized on the importance of the particle size, a significant physical property of dust formulations, underlining that formulations of smaller particles may enhance the insecticidal efficacy on a variety of stored-product beetles [ 34 , 35 , 36 , 37 , 38 , 39 ]. Korunić [ 40 ] found that the efficacy of DEs is promoted when particle size ranges between 1 and 30 μm.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Silica-Coated Insect Proof Nets for the Control of Aphis fabae, Sitophilus oryzae, and Tribolium confusum

et al. 2020

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Insect proof nets are widely used in agriculture as mechanical and physical barriers to regulate pest populations in a greenhouse. However, their integration in the greenhouse ventilation openings is highly associated with the decrease of air flow and the adequate ventilation. Thus, there is need for alternative pest management tools that do not impair adequate ventilation. In the present study, we tested four net formulations of relatively large mesh size coated with SiO2 nanoparticles, namely, ED3, ED3-P, ED5, and ED5-P to evaluate their insecticidal properties against adults of Aphis fabae and Sitophilus oryzae and larvae of Tribolium confusum. ED3 and ED5 nets were coated with SiO2 nanoparticles of different diameter, while in the case of ED3-P and ED5-P, paraffin was added to increase the mass of the deposited particles on the net’s surface. In the first series of bioassays, the knockdown and mortality rates of these species were evaluated after exposure to the aforementioned net formulations for 5, 10, 15, 20, 25, 30, 60, 90, and 180 min. In the second series of bioassays, knockdown and mortality of these species were recorded after 1, 7, and 10 days of post-exposure to the nets for different time intervals (15, 30, and 60 min). Based on our results, all nets significantly affected A. fabae, since all insects were dead at the 1-day post-exposure period to the silica-treated nets. Conversely, at the same interval, no effect on either S. oryzae adults or T. confusum larvae was observed. However, in the case of S. oryzae, the efficacy of all nets reached 100% 7 days after the exposure, even for adults that had been initially exposed for 15 min to the treated nets. Among the species tested, T. confusum larvae exhibited the lowest mortality rate, which did not exceed 34% at the 10 days of post-exposure interval. Our work underlines the efficacy of treated nets in pest management programs, under different application scenarios, at the pre- and post-harvest stages of agricultural commodities.

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“…Different species of mites or strains of one species differ in their sensitivity to acaricides/insecticides tested in separate observations. One suggested reason for this difference may be the various methods used to test the pesticide , , …”

Section: Introductionmentioning

confidence: 99%

“…One suggested reason for this difference may be the various methods used to test the pesticide. 23,24,35 A change in the tolerance or resistance of the tested species to insecticides may also result in variations in the findings. For example, resistance of Acarus siro to lindane was recorded in 1970-1971 in cheese factories in the UK.…”

Section: Introductionmentioning

confidence: 99%