scholarly journals Residual efficacy of Deltamethrin against Sitophilus oryzae (L.), Rhyzopertha dominica (F.), Tribolium castaneum (Herbst) and Sitotroga cerealella (Oliv.) in wheat grain

2018 ◽  
Vol 33 (2) ◽  
pp. 127-135 ◽  
Author(s):  
Marijana Prazic-Golic ◽  
Petar Kljajic ◽  
Goran Andric ◽  
Nenad Tamas ◽  
Stefan Prazic
Keyword(s):  
Tribolium Castaneum ◽  
Recovery Period ◽  
Sitophilus Oryzae ◽  
Adult Mortality ◽  
Rhyzopertha Dominica ◽  
Sitotroga Cerealella ◽  
Wheat Grain ◽  
Before And After ◽  
Residual Efficacy ◽  
Residual Control

Residual efficacy of the insecticide deltamethrin, an EC formulation containing 25 g/L AI + 225 g/L PBO (piperonyl butoxide synergist), against lab populations of Sitophilus oryzae, Rhyzopertha dominica, Tribolium castaneum and Sitotroga cerealella was investigated in the laboratory by applying product water solutions (0.25 mg AI/kg) to wheat grain (at 25?1?C and 60?5% r.h.). Adult mortality on 0, 7, 14 and 30 days old deposits was estimated after 2, 7 and 14 days of exposure to treated wheat grain and additional 7 days of recovery. Progeny reduction (PR, %) was also assessed. After 2 days of exposure to deposits of all ages, deltamethrin caused only 0-10% mortality of coleopterans (up to 37% after the recovery period) and 23-30% of S. cerealella, while mortality before and after recovery from 14 days of exposure was 95-50% for S. oryzae, 97-100% for R. dominica, 99-100% for T. castaneum and 100% for S. cerealella. Progeny production of S. oryzae was highest after parents contacted with 14 days old deposit of deltamethrin (PR, 76%), and lowest after contact with fresh deposit (PR, 95%), while R. dominica and T. castaneum had no progeny on any deltamethrin deposit age in wheat (PR, 100%), and S. cerealella had only a very low progeny (PR, 99%). The results showed that the synergised deltamethrin, applied at 0.25 mg/kg in wheat grain, is a highly effective insecticide for storedproduct insect control, while a higher dose is required for successful residual control of S. oryzae.

Toxicity of ethyl formate to adult Sitophilus oryzae (L.), Tribolium castaneum (herbst) and Rhyzopertha dominica (F.)

2008 ◽  
Vol 44 (3) ◽  
pp. 241-246 ◽  
Author(s):  
Ni Xin ◽  
Y.L. Ren ◽  
R.I. Forrester ◽  
Xue Ming ◽  
Daphne Mahon
Keyword(s):  
Tribolium Castaneum ◽  
Sitophilus Oryzae ◽  
Ethyl Formate ◽  
Rhyzopertha Dominica

The insect infestation of sorghum stored in granaries in Northern Nigeria

1964 ◽  
Vol 55 (3) ◽  
pp. 573-588 ◽  
Author(s):  
P. H. Giles
Keyword(s):  
Moisture Content ◽  
Sitophilus Oryzae ◽  
Dry Season ◽  
Rhyzopertha Dominica ◽  
Local Market ◽  
Sitotroga Cerealella ◽  
Northern Nigeria ◽  
Plant Materials ◽  
Insect Populations ◽  
Maximum Moisture Content

The majority of sorghum in Northern Nigeria is stored unthreshed in farmers' granaries made of dried mud or plant materials such as grass matting and cereal stems. During the course of survey work and insecticide trials in 1959–61 it was possible to examine many samples of unthreshed sorghum from granaries throughout Northern Nigeria. It was found that the distribution of insect species within the Region is not uniform. Sitophilus oryzae (L.) and Sitotroga cerealella (Ol.) are the major pests. Sitophilus zeamais Motsch. was found only in the southernmost area. Heavy infestations of Rhyzopertha dominica (F.), Lasioderma serricorne (F.), Cryptolestes ugandae Steel & Howe, Oryzaephilus mercator (Fauv.), Tribolium castaneum (Hbst.) and T. confusum Duv. usually occur. Attagenus gloriosae (F.), Ahasverus advena (Waltl), Palorus ficicola (Woll.), P. ratzeburgi (Wissm.) and P. subdcpressus (Woll.) are occasionally important.R. dominica, Bruchidius sp., G. ugandae, Planolestes cornutus (Grouv.), S. oryzae, Brachypeplus sp., T. castaneum, Sitotroga cerealella (all of which occurred on the standing crop), L. serricorne, Typhaea stercorea (L.), O. mercator, Palorus spp. and Tribolium confusum were found in sorghum sampled before storage. Insects from infested stores were found to infest sorghum growing nearby. Prestorage infestation alone can result in subsequent heavy populations of insects in the store. Cross-infestation between granaries almost certainly occurs.Under Samaru conditions, where sorghum is harvested in November–December, insect populations remain at a low level in granary-stored unthreshed sorghum until after June, when the moisture content rises in the rainy season. In sorghum stored for nine months in provincial trials, more damage occurred during the last three months than during the previous six months of storage.Sorghum heads stored in granaries made of plant materials such as grass matting and cereal stems are more severely damaged by insects than those stored in dried-mud granaries. This is probably due to a higher rate of immigration in the former.In threshed grain stored in a mud granary, moisture content and damage by the most abundant insect, Sitophilus oryzae, decreased with depth. The insect population rose to a peak in November, two months after the maximum moisture content. The numbers fell rapidly during the following dry season. The annual cycle of insect damage was also assessed by taking fortnightly samples of threshed grain from a local market. S. oryzae was the most numerous insect, but even this species was uncommon from December to May, during the dry season.

Effect of ozone on respiration of adult Sitophilus oryzae (L.), Tribolium castaneum (Herbst) and Rhyzopertha dominica (F.)

2009 ◽  
Vol 55 (10) ◽  
pp. 885-889 ◽  
Author(s):  
Baoqian Lu ◽  
Yonglin Ren ◽  
Yu-zhou Du ◽  
Yueguan Fu ◽  
Jie Gu
Keyword(s):  
Tribolium Castaneum ◽  
Sitophilus Oryzae ◽  
Rhyzopertha Dominica

Residual efficacy of spinetoram on wheat and maize against Rhyzopertha dominica and Sitophilus oryzae

2022 ◽  
Vol 95 ◽  
pp. 101900
Author(s):  
T. Ksoura ◽  
P. Agrafioti ◽  
N.G. Tsiropoulos ◽  
C.G. Athanassiou
Keyword(s):  
Sitophilus Oryzae ◽  
Rhyzopertha Dominica ◽  
Residual Efficacy

scholarly journals Efficacy of spinosad and abamectin against different populations of red flour beetle (Tribolium castaneum Herbst) in treated wheat grain

2013 ◽  
Vol 28 (2) ◽  
pp. 103-110
Author(s):  
Goran Andric ◽  
Petar Kljajic ◽  
Marijana Prazic-Golic
Keyword(s):  
Tribolium Castaneum ◽  
Significant Influence ◽  
Adult Mortality ◽  
Red Flour Beetle ◽  
Lower Mortality ◽  
Laboratory Population ◽  
Wheat Grain ◽  
Flour Beetle ◽  
Different Populations ◽  
Contact Insecticides

The efficacy of spinosad and abamectin against T. castaneum adults from a laboratory population with normal susceptibility to contact insecticides and against malathion-resistant populations from Nikinci and Jakovo was tested in the laboratory (25?1?C and 60?5% r.h.). The insecticides were applied to 500 g of untreated wheat grain for each of the following application doses: 0.25, 0.5, 1.0, 2.5 and 5.0 mg a.i./kg. After treatment, wheat was divided into three equal subsamples and 50 T. castaneum adults from each of the three test populations were released the next day into jars for each dose. Mortality was evaluated after 7, 14 and 21 days of exposure to treated wheat grain. Generally, higher concentrations and longer exposure periods resulted in higher efficacy of both insecticides, but abamectin was significantly more effective than spinosad against all three tested populations. After 7 days of exposure, mortality did not exceed 30% in any test variant. Fourteen days after treatment with the highest dose (5 mg/kg) of spinosad, mortality was highest (75%) in the laboratory population, while treatment with the same dose of abamectin achieved the highest mortality (58%) in the laboratory and Jakovo populations. After 21 days, spinosad applied at the rate of 5 mg/kg was most effective (97% mortality) in the laboratory population, while 88% efficacy was recorded in Jakovo population and 87% in Nikinci population. Abamectin doses of 2.5 and 5 mg/kg caused high adult mortality of 94-100% in the laboratory and Jakovo populations, and a significantly lower mortality in Nikinci population (75 and 86%, respectively). Statistically significant differences in the efficacy of spinosad, and particularly of abamectin, were detected among the three tested populations, the greatest difference being between the laboratory and Nikinci populations, which clearly indicates that resistance of T. castaneum adults to malathion had a significant influence.

Insecticide-retentive carriers. 2. Fenitrothion-impregnated clays

1988 ◽  
Vol 28 (2) ◽  
pp. 271
Author(s):  
JM Desmarchelier ◽  
CM Ahern
Keyword(s):  
Effective Dose ◽  
Tribolium Castaneum ◽  
Sitophilus Oryzae ◽  
Rhyzopertha Dominica ◽  
Minimum Effective Dose ◽  
Complete Protection ◽  
Chemical Determination ◽  
Insight Into

Fenitrothion as a spray or in 1 of 12 claybased carriers was admixed with wheat of 11.5% moisture and held for 142 weeks at 25�C for chemical determination and assays against added adults of Tribolium castaneum (Herbst). The period of protection correlated with the retention of fenitrothion in the carrier; i.e. correlated with the ratio of fenitrothion in carrier to that in wheat plus carrier. Fenitrothion, applied at 6 mg/kg in retentive carriers such as bentonites or halloysites, gave at least 117 weeks of complete protection against T. castaneum and against Sitophilus oryzae (L.) for 142 weeks. Minimum effective dose of fenitrothion to give 3 months of pro- tection against S. oryzae, S. granarius (L.), T. castaneum and Rhyzopertha dominica (F.) was determined as 4 mg/kg in bentonites, 8 mg/kg in halloysites compared with more than 20 mg/kg of fenitrothion applied as a spray. Some insight into the mode ofaction of retentive carriers was obtained by exposing adult T. castaneum to wheat coated with carriers containing either 0 or 1% w/w fenitrothion. In the former case, insects kept themselves free of carrier by preening. In the latter case, however, the insects became coated with fenitrothion-impregnated carriers, with a heavy concentration in and near mouthparts, suggesting lack of coordination in preening.

scholarly journals Residual Efficacy of a Deltamethrin Emulsifiable Concentrate Formulation against Rhyzopertha dominica (F.) and Sitotroga cerealella (Oliver) after Partial Treatment of Brown Rice

Insects ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 95 ◽  
Author(s):  
Frank Arthur
Keyword(s):  
Weight Loss ◽  
Brown Rice ◽  
Rhyzopertha Dominica ◽  
Sitotroga Cerealella ◽  
Feeding Damage ◽  
Progeny Production ◽  
Lesser Grain Borer ◽  
Emulsifiable Concentrate ◽  
Angoumois Grain Moth ◽  
Residual Efficacy

Rhyzopertha dominica (Fab.), the lesser grain borer, and Sitotroga cerealella (Olivier), the Angoumois grain moth, are internally feeding stored product insects that can infest raw grains. In this test, brown rice was treated with 0.5 and 1.0 ppm of a new emulsifiable concentrate (EC) formulation of the pyrethroid deltamethrin and stored for 12 months. One day after treatment, and every 3 months for 12 months, treated rice was mixed with untreated brown rice in the following ratios: 0:100 (untreated controls), 10:90, 25:75, 50:50, 75:25, and 100:0 (all treated). Bioassays were conducted by exposing 10 parental adults of each species on the rice mixtures and assessing progeny production, feeding damage, and weight loss. The progeny of S. cerealella ranged from 105.6 F1 adults on untreated brown rice to 69.4 F1 adults on 100% treated rice, but there was little feeding damage or weight loss. The progeny production of R. dominica declined from 177.4 F1 adults on untreated rice to 9.8 F1 adults on 100% treated rice. Weight loss and feeding damage were correlated with progeny production. The results show that the new deltamethrin formulation could be used for protection of brown rice, but S. cerealella may be less susceptible to deltamethrin compared to R. dominica.

scholarly journals The first report on entomopathogenic effect of Fusarium avenaceum (Fries) Saccardo (Hypocreales, Ascomycota) against rice weevil (Sitophilus oryzae L.: Curculionidae, Coleoptera)

2012 ◽  
Vol 44 (3) ◽  
pp. 11 ◽  
Author(s):  
Yacoub A. Batta
Keyword(s):  
Sitophilus Oryzae ◽  
First Record ◽  
Adult Mortality ◽  
Fusarium Avenaceum ◽  
Conidial Suspension ◽  
Wheat Grain ◽  
Stored Grain ◽  
Fungus Infection ◽  
The Mean ◽  
The Dead

This study aimed to evaluate the entomopathogenic activity of <em>Fusarium avenaceum</em> (strain 10A) against adults of <em>Sitophilus oryzae </em>infesting wheat grain. Bioassays were carried out to determine the adult mortality of<em> S. oryzae</em> when the conidial suspension of the fungus strain was applied using three types of fungus treatment. Results obtained have indicated significant differences (P=0.05) in the mean percentage of adult mortality due to the treatment with the fungus compared to the control. The highest mean percentage of adult mortality was obtained by the direct spraying of <em>S. oryzae</em> adults with the fungus conidial suspension before introduction of the treated adults into pots containing wheat grain; the lowest mean percentage of adult mortality was obtained by spraying the inner surfaces of pots with the fungus conidial suspension before introducing the grain and insects. This study demonstrated the typical growth of <em>F. avenaceum</em> on the outer surfaces of the dead treated adults of <em>S. oryzae</em>. Presence of the external fungus growth on the dead insects indicated that the death of <em>S. oryzae</em> adults was attributed to the fungus infection. Results obtained in the present paper represent the first record of efficacy of <em>F. avenaceum</em> against a coleopteran stored-grain insect, mainly including <em>S. oryzae</em>.

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