Results 171 to 180 of about 16,081 (217)

Application of Object Detection Algorithm in Identification of Rice Weevils and Maize Weevils

Proceedings of the 2018 2nd International Conference on Deep Learning Technologies, 2018
Deep learning based models have had great success in object detection, but the state of the art models have not yet been widely applied to the identification of the stored-grain pests. We apply for the first time an object detection model to identify rice weevils and maize weevils, which have always been a challenge in the field of the research of ...
Zhicai Liu, Guanhong Zhang, Haiying Yang, Muyi Sun, Hao Dang, Xiaoguang Zhou   +5 more
openaire   +1 more source

The chemical identification of the rice weevil and maize weevil aggregation pheromone

Tetrahedron Letters, 1984
Abstract (R*,S*)-4-methyl-s-hydroxy-3-heptanone is identified as the major component of the aggregation pheromone of the rice weevil ( sitophilus oryzae L.) and the maize weevil ( S. zeamais Motsch.).
Norman R. Schmuff, Joel K. Phillips, Wendell E. Burkholder, Henry M. Fales, Chi-Wan Chen, Peter P. Roller, Michael Ma   +6 more
openaire   +1 more source

Impacts of Seeding Rate on Interactions Between Rice and Rice Water Weevils

Journal of Economic Entomology, 2009
The rice water weevil, Lissorhoptrus oryzophilus Kuschel, is the most widely distributed and destructive early season insect pest of rice, Oryza sativa L., in the United States. Economic losses result primarily from feeding by the larval stage of this insect on the roots of flooded rice plants.
M J, Stout, D, Harrell, K V, Tindall, J, Bond   +3 more
openaire   +2 more sources

Rice Water Weevil Control, 1986

Insecticide and Acaricide Tests, 1988
Abstract The experiment was conducted at the Texas A&M University Agricultural Research and Extension Center at Beaumont. The design was a randomized complete block with 7 treatments and 4 replications. Each experimental unit was 20 × 5 ft and surrounded by a metal barrier to prevent contamination from other units.
M. O. Way, R. G. Wallace
openaire   +2 more sources

Rice Water Weevil Control, 1981

Insecticide and Acaricide Tests, 1982
Abstract Rice was planted Apr 28 in Crowley silt loam at the Rice Research and Extension Center, Stuttgart, AR. Both tests were arranged in a randomized complete block design with 4 (Test I) or 3 (Test II) replications. All plots were sampled for root-feeding larvae by taking 5 soil cores (9 cm dia x 7 cm deep) from the drill rows of ...
D. R. Morgan, P. H. Slaymaker, N. P. Tugwell   +2 more
openaire   +1 more source

Rice Water Weevil Control, 1985

Insecticide and Acaricide Tests, 1987
Abstract The experiment was conducted at the TAMU Agricultural Research and Extension Center at Beaumont. ; The design was a randomized complete block with 12 treatments and 4 blocks. Each experimental unit was 20 ft × 5 ft and surrounded by a metal barrier to prevent contamination from other units.
M. O. Way, R. G. Wallace
openaire   +1 more source

Biological Study of the Rice Weevil Complex

Annals of the Entomological Society of America, 1959
The large and the small rice weevils are distinct, reproductively isolated species. The name Sitophilus oryza (L.) is applicable to the former, S. sasakii (Tak.) to the latter. Coloration is variable in both, their measurements overlap, and no practical external morphological distinctions were found, but the two species differ in the eighth sternum of ...
E. H. Floyd, L. D. Newsom
openaire   +1 more source

Rice Water Weevil Control, 1984

Insecticide and Acaricide Tests, 1985
Abstract Rice was planted in Crowley silt loam at the Rice Research and Extension Center in Stuttgart, AR; ‘Lebonnet’ was planted on 14 May for the first two tests and ‘Bond’ on 21 Jim for the third. Plots for the first preflood test were 6 ft x 15 ft; all other plots were 5-ft dia and surrounded by aluminum flashing to prevent water ...
D. R. Morgan, N. P. Tugwell
openaire   +1 more source

Rice Water Weevil Control, 1983

Insecticide and Acaricide Tests, 1984
Abstract Rice was planted in Cowley silt loam at the Rice Res. and Ext. Cent., Stuttgart, AR. Plots for the CN 11-3877 10G preflood test were 5 by 15 ft. All other plots were 5 ft dia cm and enclosed by aluminum flashing to prevent water movement.
D. R. Morgan, N. P. Tugwell
openaire   +1 more source

Chemical Control of the Rice Water Weevil

Journal of Economic Entomology, 1961
Small plot tests were conducted during 1959 and 1960 to control the larval stage of the rice water weevil, Lissorhoptrus oryzophilus (Kuschel). Aldrin and heptachlor were equally effective either when applied as a seed treatment or when mixed with fertilizer.
openaire   +1 more source