scholarly journals Infochemical-mediated preference behavior of the maize weevil, Sitophilus zeamais Motschulsky, when searching for its hosts

2008 ◽  
Vol 19 (4) ◽  
Author(s):  
Qingfeng Tang ◽  
Yuejin Wu ◽  
Binmei Liu ◽  
Zengliang Yu
Keyword(s):  
Aggregation Pheromone ◽  
Brown Rice ◽  
Behavioral Responses ◽  
Grain Sorghum ◽  
Sitophilus Zeamais ◽  
Host Volatiles ◽  
Maize Weevil ◽  
Preference Behavior ◽  
Odour Source

Behavioral responses of S. zeamais to odours from pulverized wheat, brown rice, sorghum, buckwheat, peanut and cork were compared in a Y-tube-olfactometerbioassay. Results showed that both sexes responded to host volatiles and males were more sensitive than females. The strongest responses to grains of wheat and brown rice were found, and insects reared on these were dramatically heavier than on other tested materials (grain sorghum, buckwheat, peanut and cork). Multiple-choices tests, in which volatiles from males that were removed from the wheat within different minutes were simultaneously presented in the chamber, were used to study whether males can release aggregation pheromone if not on the grain. The pheromone was released by males within about 13 minutes after removal from the grains. Responses to pheromones produced by males were skewed toward females although both sexes were attracted. Both sexes responded most strongly to the odour source comprising pheromone with host volatiles.

scholarly journals Flight take-off and walking behavior of insecticide-susceptible and – resistant strains of Sitophilus zeamais exposed to deltamethrin

2009 ◽  
Vol 99 (4) ◽  
pp. 393-400 ◽  
Author(s):  
N.M.P. Guedes ◽  
R.N.C. Guedes ◽  
G.H. Ferreira ◽  
L.B. Silva
Keyword(s):  
Resistant Strain ◽  
Insect Pests ◽  
Behavioral Responses ◽  
Insect Behavior ◽  
Sitophilus Zeamais ◽  
Maize Weevil ◽  
Walking Behavior ◽  
Resistant Strains ◽  
Managed Ecosystems ◽  
Behavioral Resistance

AbstractInsects have evolved a variety of physiological and behavioral responses to various toxins in natural and managed ecosystems. However, insect behavior is seldom considered in insecticide studies although insects are capable of changing their behavior in response to their sensory perception of insecticides, which may compromise insecticide efficacy. This is particularly serious for insect pests that are physiologically resistant to insecticides since insecticide avoidance may further compromise their management. Locomotion plays a major role determining insecticide exposure and was, therefore, considered in investigating the behavioral responses of male and female adult insects from an insecticide-susceptible and two insecticide-resistant strains of the maize weevil Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae), a major pest of stored cereals. Different dose-dependent behavioral responses were expected among strains with behavioral resistance less likely to occur in physiologically resistant insects since they are able to withstand higher doses of insecticide. The behavioral responses to deltamethrin-sprayed surfaces differed among the maize weevil strains. Such responses were concentration-independent for all of the strains. Stimulus-independent behavioral resistance was unrelated to physiological resistance with one resistant strain exhibiting higher rates of flight take-off and the other resistant strain exhibiting lower flight take-off. Female mobility was similar for all strains, unlike male mobility. Males of each strain exhibited a pattern of mobility following the same trend of flight take-off. Behavioral patterns of response to insecticide are, therefore, variable among strains, particularly among insecticide-resistant strains, and worth considering in resistance surveys and management programs.

Efficacy of soft-electron (low-energy electron) treatment for disinfestation of brown rice containing different ages of the maize weevil, Sitophilus zeamais Motschulsky

2009 ◽  
Vol 78 (7-8) ◽  
pp. 627-630 ◽  
Author(s):  
Taro Imamura ◽  
Setsuko Todoriki ◽  
Akihiro Miyanoshita ◽  
Akemi K. Horigane ◽  
Mitsuru Yoshida ◽  
...  
Keyword(s):  
Brown Rice ◽  
Sitophilus Zeamais ◽  
Low Energy ◽  
Energy Electron ◽  
Maize Weevil ◽  
Different Ages ◽  
Low Energy Electron

scholarly journals Effect of temperature on development of Theocolax elegans (Westwood) (Hymenoptera: Pteromalidae) parasitizing larvae of the maize weevil Sitophilus zeamais (Coleoptera: Curculionidae) in brown rice

2004 ◽  
Vol 39 (3) ◽  
pp. 497-503 ◽  
Author(s):  
Taro Imamura ◽  
Jaitip Uraichuen ◽  
Porntip Visarathanonth ◽  
Sayaka Morimoto ◽  
Akihiro Miyanoshita
Keyword(s):  
Brown Rice ◽  
Sitophilus Zeamais ◽  
Effect Of Temperature ◽  
Maize Weevil

Male-produced aggregation pheromone of the maize weevil,Sitophilus zeamais, and interspecific attraction between threeSitophilus species

1983 ◽  
Vol 9 (7) ◽  
pp. 831-841 ◽  
Author(s):  
C. A. Walgenbach ◽  
J. K. Phillips ◽  
D. L. Faustini ◽  
W. E. Burkholder
Keyword(s):  
Aggregation Pheromone ◽  
Sitophilus Zeamais ◽  
Maize Weevil ◽  
Interspecific Attraction

Susceptibility of various developmental stages of the maize weevil, Sitophilus zeamais Motschulsky (Col., Curculionidae) to methyl iodide in brown rice

2005 ◽  
Vol 129 (1) ◽  
pp. 12-16 ◽  
Author(s):  
S. I. Faruki ◽  
A. Miyanoshita ◽  
K. Takahashi ◽  
T. Misumi ◽  
T. Imamura ◽  
...  
Keyword(s):  
Methyl Iodide ◽  
Developmental Stages ◽  
Brown Rice ◽  
Sitophilus Zeamais ◽  
Maize Weevil

Factors Affecting the Response of the Maize Weevil, Sitophilus zeamais (Coleoptera: Curculionidae), to Its Aggregation Pheromone 1

1986 ◽  
Vol 15 (3) ◽  
pp. 733-738 ◽  
Author(s):  
Catherine A. Walgenbach ◽  
Wendell E. Burkholder
Keyword(s):  
Aggregation Pheromone ◽  
Sitophilus Zeamais ◽  
Maize Weevil ◽  
Factors Affecting

Biopesticidal Extractives and Compounds from Warburgia ugandensis against Maize Weevil (Sitophilus zeamais)

2015 ◽  
Vol 5 (4) ◽  
pp. 236-243
Author(s):  
Sylvia A. Opiyo ◽  
Lawrence O. A. Manguro ◽  
Dorothy A. Okoth ◽  
Anjeline A. Ochung ◽  
Charles O. Ochieng
Keyword(s):  
Sitophilus Zeamais ◽  
Maize Weevil

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 Effect of X-ray irradiation on the F1 generation of Sitophilus zeamais Motschulsky and the germination rate of maize grain

2021 ◽  
Vol 82 (1) ◽  
Author(s):  
Sobifagha Princess Bell-Gam ◽  
Luke Chinaru Nwosu ◽  
Kayode David Ileke ◽  
Uwaoma Otuodichinma Aguwa
Keyword(s):  
Germination Rate ◽  
Seed Viability ◽  
Control Process ◽  
Progressive Increase ◽  
Sitophilus Zeamais ◽  
Maize Weevil ◽  
Maize Production ◽  
X Ray ◽  
Significant Difference ◽  
Flour Production

Abstract Background The use of X-ray irradiation in the control of the maize weevil, Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) infesting stored maize was tested at 60, 70 and 80 KeV as part of the international concerted efforts to save maize production and enhance food security. Investigations were done in the laboratory at mean temperature and relative humidity of 29.2 °C and 75.7%, respectively using three varieties of maize. The possibility that X-ray irradiation can affect the viability of maize grains when planted after weevil control process was also evaluated in the laboratory. Standard methods were used to achieve the specific objectives, and X-ray machine snap constituted the exposure time for each dose. Results The results revealed 10% mortality of adult weevils after 24 h and 40% mortality after a period of 7 days. The result indicates moderate effect on mortality. Progressive increase in mortality was recorded as dose increased from 60 to 80 KeV. X-ray irradiation at the doses tested did not significantly (P > 0.05) restrict S. zeamais emergence from maize grains and did not also significantly protect grains against damage and flour production. There was no difference in the pattern of daily emergence of new progenies and pattern of accumulated emergence. The relationship between X-ray irradiation doses and weight of emerging progenies require more specific analysis. Absence of significant difference between the viability of irradiated grains and un-irradiated grains strongly suggests that X-ray irradiation did not adversely affect seed viability, and this gives irradiation technique an opportunity of higher acceptability in agriculture. Conclusions We recommend > 80 KeV of X-ray irradiation or its incorporation into integrated pest management system in order to achieve effective post-harvest control of the pest.

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