Rearing Stored-Product Insects for Laboratory Studies: Lesser Grain Borer, Granary Weevil, Rice Weevil, Sitophilus zeamais, and Angoumois Grain Moth1234

1967 ◽  
Vol 60 (4) ◽  
pp. 1078-1082 ◽  
Author(s):  
R. G. Strong ◽  
D. E. Sbur ◽  
G. J. Partida
Keyword(s):  
Sitophilus Zeamais ◽  
Rice Weevil ◽  
Laboratory Studies ◽  
Granary Weevil ◽  
Lesser Grain Borer ◽  
Stored Product Insects

Stored Wheat Insect Infestation Related to Uric Acid as Determined by Liquid Chromatography

1984 ◽  
Vol 67 (3) ◽  
pp. 644-647
Author(s):  
Randy L Wehling ◽  
David L Wetzel ◽  
John R Pedersen
Keyword(s):  
Uric Acid ◽  
Liquid Chromatography ◽  
Acid Content ◽  
Sitophilus Oryzae ◽  
Correlation Coefficients ◽  
Rice Weevil ◽  
Growth Stages ◽  
Granary Weevil ◽  
Lesser Grain Borer ◽  
Late Instar

Abstract Liquid chromatography is used to measure the uric acid content of wheat internally infested by various growth stages of granary weevil (Sitophilus granarius), rice weevil (Sitophilus oryzae), and lesser grain borer (Ryzopertha dominica). Good correlation exists between numbers of insects and uric acid content of grain infested by a given stage of an internally infesting stored product insect, with correlation coefficients ranging from 0.970 to 0.998. Uric acid content of infested grain increases as the insect life cycle progresses, with granary weevil producing the greatest quantities of uric acid followed in order by rice weevil and lesser grain borer. A detection limit for the analytical procedure of less than 1.0 ppm uric acid allows detection of infestation levels as low as one kernel per 100 g grain for late instar granary weevil larvae. This limit is sufficiently sensitive to detect levels of infestation that may be commonly encountered in commerce.

Leaf Extracts of Shiyalmutra (Blumea lacera Dc.) as Botanical Insecticides Against Lesser Grain Borer and Rice Weevil

2005 ◽  
Vol 5 (2) ◽  
pp. 201-204 ◽  
Author(s):  
B. Roy . ◽  
R. Amin . ◽  
M.N. Uddin . ◽  
A.T.M.S. Islam . ◽  
M.J. Islam . ◽  
...  
Keyword(s):  
Rice Weevil ◽  
Botanical Insecticides ◽  
Leaf Extracts ◽  
Lesser Grain Borer ◽  
Blumea Lacera

Susceptibility of Ethiopian wheat varieties to granary weevil and rice weevil infestation at optimal and sub-optimal temperatures

2019 ◽  
Vol 83 ◽  
pp. 267-274
Author(s):  
Karta Kaske Kalsa ◽  
Bhadriraju Subramanyam ◽  
Girma Demissie ◽  
Rizana Mahroof ◽  
Admasu Worku ◽  
...  
Keyword(s):  
Rice Weevil ◽  
Granary Weevil ◽  
Wheat Varieties ◽  
Weevil Infestation

PRELIMINARY EVALUATION OF TRIMETHACARB AS A WHEAT PROTECTANT AGAINST FOUR SPECIES OF STORED-PRODUCT INSECTS1

1987 ◽  
Vol 22 (2) ◽  
pp. 126-130 ◽  
Author(s):  
W. R. Halliday
Keyword(s):  
Winter Wheat ◽  
Preliminary Evaluation ◽  
Lesser Grain Borer ◽  
Angoumois Grain Moth ◽  
Stored Product Insects ◽  
Soft Red Winter Wheat ◽  
Carbamate Insecticide ◽  
Grain Protectant ◽  
Red Winter Wheat ◽  
Confused Flour Beetle

Trimethacarb, a carbamate insecticide, was evaluated at four concentrations as a grain protectant of soft red winter wheat against four species of common stored-product insects. Its effectiveness was assessed using two criteria: mortality of adults after 5 days exposure on the treated grain and suppression of the F 1 generation's emergence. At the highest rate of 25 ppm, mortality of the confused flour beetle and the rice weevil was 24.0 and 71.5%, respectively. The mortality of the adult lesser grain borers and Angoumois grain moths after 5 days was 100 and 93.9%, respectively, at 5.0 ppm. There was 68.5% suppression of the rice weevil's emergence at 25 ppm while for the lesser grain borer and the Angoumois grain moth there was greater than 95% suppression at rates of 5.0 ppm or higher.

Rearing Stored-Product Insects for Laboratory Studies: Bean and Cowpea Weevils12

1968 ◽  
Vol 61 (3) ◽  
pp. 747-751 ◽  
Author(s):  
R. G. Strong ◽  
G. J. Partida ◽  
D. N. Warner
Keyword(s):  
Laboratory Studies ◽  
Stored Product Insects

Susceptibility of Twelve Genotypes of Triticale to the Rice Weevil (Coleoptera: Curculionidae) and the Lesser Grain Borer (Coleoptera: Bostrichidae)2

1991 ◽  
Vol 26 (3) ◽  
pp. 339-344 ◽  
Author(s):  
J. E. Baker ◽  
F. H. Arthur ◽  
P. L. Bruckner
Keyword(s):  
Moisture Content ◽  
Growth Parameters ◽  
Oryza Sativa L ◽  
Sitophilus Oryzae ◽  
Brown Rice ◽  
Rice Weevil ◽  
Rhyzopertha Dominica ◽  
Progeny Production ◽  
Lesser Grain Borer ◽  
Total Progeny

Population development by the rice weevil, Sitophilus oryzae (L.) and feeding damage caused by the lesser grain borer, Rhyzopertha dominica (F.), were assessed on twelve triticale (X Triticosecale Wittmack) genotypes maintained at 25°C and at 11.7 or 14.2% moisture content. Among genotypes at 14.2% moisture content, total progeny production by the rice weevil ranged from 7.1 (GA82014) to 8.8 (87AB13541) weevils per female-day; mean time to adult emergence ranged from 35.5 (GA82014) to 36.9 days (87AB13541 and CT4699); and rate of emergence (a measure of the slope of the cumulative emergence curve at the average emergence day) ranged from 0.59 (87AB 13541) to 0.72 (‘Morrison’). Although there were some statistical differences among these population growth parameters on different triticale genotypes, all genotypes were at least as susceptible as the long grain brown rice (Oryza sativa L.) and soft red winter wheat (Triticum aestivum L., cultivar ‘Florida 302’) controls tested concurrently. Development time of rice weevils was significantly delayed and total progeny production after 65 days was reduced about 17-fold on triticale genotypes at 11.7% moisture content. About 3-fold more frass was produced by lesser grain borers feeding for 7 days at 25°C on triticale genotypes at 14.2% moisture content compared to that obtained on genotypes at 11.7% moisture content. Significantly more feeding and frass production by lesser grain borers occurred on triticale and wheat than occurred on rice.

Laboratory studies on dispersion behaviour of adult beetles in grain. IV.—The lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera, Bostrychidae)

1964 ◽  
Vol 54 (4) ◽  
pp. 715-722 ◽  
Author(s):  
Gordon Surtees
Keyword(s):  
Moisture Content ◽  
Group Formation ◽  
Vertical Plane ◽  
Rhyzopertha Dominica ◽  
Locomotory Activity ◽  
Laboratory Studies ◽  
Lesser Grain Borer ◽  
Cent Moisture ◽  
Vertical Glass ◽  
Grain Bulk

Dispersion behaviour of the adult of the lesser grain borer, Rhyzopertlia dominica (F.), was investigated under controlled conditions by observing the numbers occurring on the surface, or at various depths below it, in small bulks of grain. The effects of population density, temperature and moisture content of the grain on numbers at the surface were studied by using groups of insects in 500 g. wheat, and on dispersion in the vertical plane by confining beetles within a monogranular plate of wheat held between vertical glass sheets, through which the positions of individuals could be observed.In grain at 25°C. and 14 per cent, moisture content (70 per cent. R.H.), the proportion of a group on the surface averaged approximately six per cent, for densities of 5–100 insects in 500 g., and the proportion was higher than in grain at the same temperature and 9 or 17 per cent, moisture, or at the same moisture content and 15 or 35°C.In grain of 14 per cent, moisture content, the level of individual locomotory activity increased from 15 to 35°C. At 25°C., locomotory activity was depressed in grain of 9 and 14 as compared with 17 per cent, moisture content. These results are discussed in relation to group formation and dispersal of R. dominica and its contact with Sitophilus granarius (L.) if both species are present in the same grain bulk.

Sign in / Sign up

Export Citation Format

Share Document