The resistance of new varieties of maize to post-harvest infestation by Sitophilus zeamais Motsch and Sitophilus oryzae (L.)

1981 ◽  
Vol 96 (2) ◽  
pp. 479-481 ◽  
Author(s):  
M. F. Ivbiljaro
Keyword(s):  
Sitophilus Oryzae ◽  
Abundant Species ◽  
Sitophilus Zeamais ◽  
International Institute ◽  
Maize Seed ◽  
Post Harvest ◽  
Maize Seeds ◽  
Adult Insect ◽  
New Varieties ◽  
Sitophilus Zeamais Motsch

SUMMARYThe indices of susceptibility of five new varieties of maize: TZE 3 (3·01), TZE 4 (6·69), TZSR (5·58) developed at the International Institute of Tropical Agriculture, Ibadan, and MSRB-W (9·53) and MSC-opaque (5·0) at the National Cereals Research Institute, Ibadan, showed that the yellow variety, TZE 3, is the most resistant to post-harvest infestation by Sitophilus zeamais Motsch and Sitophilus oryzae (L.), the latterbeing the more abundant species.Emerging F1 generation adults of either species of Sitophilusdeveloped longer, and were more numerous in soaked maize seeds without testa than in unsoaked, intactmaize seeds. Seed germinability declined as the number of holes per maize seed caused by adult insect emergence increased.

scholarly journals Flight activity of Sitophilus oryzae (L) and Sitophilus zeamais Motsch (Coleoptera: Curculionidae) and its relationship with susceptibility to insecticides

2009 ◽  
Vol 38 (3) ◽  
pp. 405-409 ◽  
Author(s):  
Javier A Vásquez-Castro ◽  
Gilberto C De Baptista ◽  
Luiz R P Trevizan ◽  
Casimiro D Gadanha Jr
Keyword(s):  
Sitophilus Oryzae ◽  
Flight Activity ◽  
Sitophilus Zeamais ◽  
Sitophilus Zeamais Motsch

scholarly journals Effects of Essential Oils from 24 Plant Species on Sitophilus zeamais Motsch (Coleoptera, Curculionidae)

Insects ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 532
Author(s):  
William R. Patiño-Bayona ◽  
Leidy J. Nagles Galeano ◽  
Jenifer J. Bustos Cortes ◽  
Wilman A. Delgado Ávila ◽  
Eddy Herrera Daza ◽  
...  
Keyword(s):  
Essential Oils ◽  
Chemical Control ◽  
Sitophilus Zeamais ◽  
Contact Toxicity ◽  
Stored Products ◽  
Collateral Damage ◽  
Maize Weevil ◽  
Active Constituents ◽  
Insect Mortality ◽  
Sitophilus Zeamais Motsch

Chemical control of the maize weevil (Sitophilus zeamais) has been ineffective and presents serious collateral damage. Among plant-derived insecticides, essential oils (EOs) are suitable candidates to control this stored products pest. In this work, the insecticidal activities of 45 natural EOs against S. zeamais adults were screened, and the most promising ones (24 EOs) were characterized by GC–MS. The repellent and toxic effects (contact and fumigant) of these 24 EOs were determined, and by a cluster analysis they were classified into two groups considering its fumigant activity and contact toxicity. For the EOs with the highest fumigant potential (14 oils) and their main active constituents (17 compounds), lethal concentrations were determined. The most active EOs were those obtained from L. stoechas and L. alba, with LC50 values of 303.4 and 254.1 µL/L air and characterized by a high content of monoterpenes. Regarding the major compounds, the oxygenated monoterpenes R-(+)-pulegone (LC50 = 0.580 mg/L air), S-(-)-pulegone (LC50 = 0.971 mg/L air) and R-(-)-carvone (LC50 = 1.423 mg/L air) were the most active, as few variations in their concentrations significantly increased insect mortality.

scholarly journals Post-harvest evaluation of selected inbred lines to maize weevil Sitophilus zeamais resistance

2018 ◽  
Vol 10 (5) ◽  
pp. 105-114 ◽  
Author(s):  
S. Khakata ◽  
F. N. Mbute ◽  
G. N. Chemining’wa ◽  
M. Mwimali ◽  
J. Karanja ◽  
...  
Keyword(s):  
Inbred Lines ◽  
Sitophilus Zeamais ◽  
Maize Weevil ◽  
Post Harvest
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