Survival and reproduction of Tribolium castaneum (Herbst), Rhyzopertha dominica (F.) and Sitophilus oryzae (L.) following periods of starvation

2006 ◽  
Vol 42 (3) ◽  
pp. 328-338 ◽  
Author(s):  
Gregory J. Daglish
Keyword(s):  
Tribolium Castaneum ◽  
Sitophilus Oryzae ◽  
Rhyzopertha Dominica ◽  
Survival And Reproduction

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.

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 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.

Sign in / Sign up

Export Citation Format

Share Document