Influence of grain type on the efficacy of spinetoram for the control of Rhyzopertha dominica, Sitophilus granarius and Sitophilus oryzae

2015 ◽  
Vol 64 ◽  
pp. 1-7 ◽  
Author(s):  
Thomas N. Vassilakos ◽  
Christos G. Athanassiou ◽  
Nikolaos G. Tsiropoulos
Keyword(s):  
Sitophilus Oryzae ◽  
Rhyzopertha Dominica ◽  
Sitophilus Granarius

Dryacide treatment of stored wheat: its efficacy against insects, and after processing

1987 ◽  
Vol 27 (2) ◽  
pp. 309 ◽  
Author(s):  
JM Desmarchelier ◽  
JC Dines
Keyword(s):  
Carbon Dioxide ◽  
Diatomaceous Earth ◽  
Sitophilus Oryzae ◽  
Silica Aerogels ◽  
Rhyzopertha Dominica ◽  
Ephestia Cautella ◽  
Immature Stages ◽  
Sitophilus Granarius ◽  
Flour Quality ◽  
Effective Level

The efficacy of Dryacide (diatomaceous earth coated with silica aerogels) on wheat was tested in the laboratory against adult and immature stages of 4 species of Coleoptera and against immature stages of 1 species of Lepidoptera. The minimum effective level of Dryacide increased in the following order: immature Ephestia cautella (Walker) ~ immature Tribolium castaneum (Herbst) < immature Rhyzopertha dominica (F) < adult R. dominica ~ adult T. castaneum < adult Sitophilus oryzae (L) < adult Sitophilus granarius (L) < immature Sitophilus species. When wheat treated with Dryacide was milled in the laboratory without prior cleaning, less than 3% of the Dryacide carried over into the flour. Commercial cleaning of wheat removed (�s.e.) about 98 � 1% of Dryacide, and no Dryacide could be detected in the flour. Dryacide treatment did not affect flour quality as determined by the volume of sponge cakes and the production of carbon dioxide by fermenting dough.

scholarly journals Determinação de concentrações de Beauveria bassiana (Bals.) Vuill. para o controle de insetos-pragas de grãos armazenados

1997 ◽  
Vol 26 (1) ◽  
pp. 15-20 ◽  
Author(s):  
Alcides Moino Jr. ◽  
Sérgio B. Alves
Keyword(s):  
Beauveria Bassiana ◽  
Sitophilus Oryzae ◽  
Rhyzopertha Dominica

Determinou-se a suscetibilidade de Sitophilus oryzae (L.), S. zeamais (Motsch.) e Rhyzopertha dominica (Fabr.) a dois isolados do fungo Beauveria bassiana (Bals.) Vuill. Para isso foram usados recipientes contendo arroz beneficiado, inoculado previamente com conídios dos isolados, infestados com as três espécies de insetos. Esses recipientes foram mantidos a 26 ± 0,5°C, 70 ± 10% de UR e fotofase de 12 horas. As três espécies foram suscetíveis aos dois isolados do patógeno. Os dois isolados foram eficientes para o controle de S. oryzae, na concentração de 0,5 g de conídios/100 g de grãos. Para S. zeamais, o isolado 604 foi mais eficiente na concentração de 0,1 g de conídios/100 g de grãos. Com relação a R. dominica, foram suficientes dosagens de 0,01 g (isolado 476) e 0,05 g (isolado 604)/100 g de grãos, confirmando a maior suscetibilidade desta espécie ao patógeno.

scholarly journals Mobility of Stored Product Beetles after Exposure to a Combination Insecticide Containing Deltamethrin, Methoprene, and a Piperonyl Butoxide Synergist Depends on Species, Concentration, and Exposure Time

Insects ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 151 ◽  
Author(s):  
Frank H. Arthur ◽  
Christos G. Athanassiou ◽  
W. Robert Morrison
Keyword(s):  
Exposure Time ◽  
General Pattern ◽  
Sitophilus Oryzae ◽  
Piperonyl Butoxide ◽  
Rhyzopertha Dominica ◽  
Cryptolestes Ferrugineus ◽  
Curve Fit ◽  
Exposure Interval ◽  
Grain Protectant ◽  
The Relationship

Adults of Rhyzopertha dominica (F.), the lesser grain borer, Cryptolestes ferrugineus (Stephens), the rusty grain beetle, and Sitophilus oryzae (L.), the rice weevil, were exposed for 1, 24, and 72 h on wheat treated with concentrations of 0% (untreated controls) to 100% of the proposed label rate of an experimental formulation of deltamethrin + Methoprene + piperonyl butoxide synergist. Movement and velocity of movement were assessed after each exposure time using a camera-based monitoring system (Ethovision®). Movement of R. dominica decreased with increasing concentration and exposure time, so that movement had virtually ceased at the 48 and 72 h exposures. Cryptolestes ferrugineus was less susceptible compared to R. dominica, but there was still a general pattern of decreased movement and velocity of movement with increasing concentration and exposure time. Sitophilus oryzae was the least susceptible species, with less differences at the 1 h exposure interval compared to the other two species, but after 24–72 h, the patterns of declining movement and velocity were apparent as the concentration increased. Data were analyzed using curve-fit equations to show the relationship between concentration and exposure time for each species. Results show that the Ethovison system can be used to assess the sub-lethal effects of exposure to grain protectant insecticides and elucidate behavioral variation between different stored product insects.

scholarly journals Natural Formulation Based on Diatomaceous Earth and Botanicals against Stored Product Insects

Insects ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 613 ◽  
Author(s):  
Ivan Paponja ◽  
Vlatka Rozman ◽  
Anita Liška
Keyword(s):  
Diatomaceous Earth ◽  
Corn Oil ◽  
Sitophilus Oryzae ◽  
Rhyzopertha Dominica ◽  
Lower Amount ◽  
Favorable Effect ◽  
Stored Product Insects ◽  
N Form ◽  
Negative Side Effects ◽  
Natural Formulation

Diatomaceous earth (DE) has long been known as a potential protectant for stored cereals against various stored product insects. Despite favorable effect for the environment and human health, DE has some negative side effects on the treated commodity. In order to minimize negative response and to improve its efficacy, this paper represents a study of developed natural formulation based on DE SilicoSec® enhanced with botanicals (essential oil lavender, corn oil, and bay leaves dust) and silica gel. The activity of formulation (labeled as N Form) was tested against Sitophilus oryzae (L.), Rhyzopertha dominica (F.), and Tribolium castaneum (Herbst) in seed wheat and barley under controlled conditions. As a reference comparative value, DE SilicoSec® was used. N Form showed higher efficacy than DE, especially in barley at the lowest concentration, inducing higher mortality of all three insect species. The highest average progeny inhibition was recorded in R. dominica population both in seed wheat and barley with 94.9% and 96.3% of inhibition, respectively, followed with S. oryzae and T. castaneum inhibition of 90.6% and 86.1%, respectively, in wheat and 94.9% and 89.7%, respectively, in barley. Results indicate that the developed natural formulation N Form enhanced the activity of DE SilicoSec® using lower amount of DE dust and that it could be successfully implemented for storage of cereals as alternatives to chemical pesticides for stored product insect control.

Variation in tolerance of seven species of stored product Coleoptera to methyl bromide and phosphine in strains from twenty-nine countries

1981 ◽  
Vol 71 (2) ◽  
pp. 299-306 ◽  
Author(s):  
Barbara D. Hole
Keyword(s):  
Tribolium Castaneum ◽  
Methyl Bromide ◽  
Developmental Stages ◽  
Rhyzopertha Dominica ◽  
Immature Stages ◽  
Sitophilus Granarius ◽  
Concentration Time ◽  
Large Populations

AbstractThe toxicities at 25°C and 70% RH of methyl bromide at about 4 mg/litre and phosphine at about 0·24 mg/litre were determined for large populations, including all developmental stages, of a number of strains of seven species of stored product beetles from 29 countries for a range of exposure periods. The species tested were Oryzaephilus surmamensis (L.), Rhyzopertha dominica (F.), Sitophilus granarius (L.), S. oryzae (L.), S. zeamais Motsch., Tribolium castaneum (Hbst.) and T. confusum Duv. With both fumigants, some individuals of certain strains of S. oryzae and T. castaneum survived a concentration × time product twice that sufficient to kill every individual of other strains of these species, and this was also true for R. dominica with methyl bromide and T. confusum with phosphine. With methyl bromide, some individuals of six species survived the longest exposure used. For the two species of Tribolium, this was 48 h, and for the three of Sitophilus and R. dominica it was 32 h. With phosphine, individuals in many strains of S. granarius, S. oryzae and S. zeamais survived for 8 days. In several of the species, there was some correlation between the tolerances of immature stages and of adults for both fumigants. Many strains were tolerant to both fumigants.

scholarly journals Evaluation of a Greek Diatomaceous Earth for Stored Product Insect Control and Techniques That Maximize Its Insecticidal Efficacy

2020 ◽  
Vol 10 (18) ◽  
pp. 6441
Author(s):  
Georgia V. Baliota ◽  
Christos G. Athanassiou
Keyword(s):  
Diatomaceous Earth ◽  
Sitophilus Oryzae ◽  
Rhyzopertha Dominica ◽  
Insect Control ◽  
Stored Products ◽  
Cryptolestes Ferrugineus ◽  
Wide Range ◽  
Insecticidal Efficacy ◽  
Confused Flour Beetle ◽  
Laboratory Bioassays

Laboratory bioassays were conducted to evaluate the insecticidal efficacy of a diatomaceous earth deposit from Greece, for a wide range of stored product insects. In this context, populations of five different insect species, Tribolium confusum Jacquelin DuVal, the confused flour beetle; Sitophilus oryzae (L.), the rice weevil; Rhyzopertha dominica (F.), the lesser grain borer; Oryzaephilus surinamensis (L.), the sawtoothed grain beetle; Cryptolestes ferrugineus (Stephens), the rusty grain beetle, which cover a major spectrum of insects species of stored products worldwide, were used in the bioassays. The different treatment of diatomaceous earth (DE) rocks (grinding, diatomaceous enrichment, powder granulometry) led to the creation of five types of formulations (namely DE1, DE2, DE3, DE5 and DE6) that exhibited significant fluctuations in their insecticidal efficacy when applied on wheat. In general, some of the modified formulations were found to be very effective against species such as R. dominica and T. confusum that may be difficult to control at the current labeled doses of commercial DE formulations. Overall, our data clearly indicate that this specific Greek deposit has considerable insecticidal properties, which can be further utilized in designing commercial formulations for insect control at the postharvest stages of durable agricultural commodities, provided that the deposit will be modified at specific enrichment and granulometry levels.

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