scholarly journals Control of Western Corn Rootworm and Residual Pest Control, 1996

1997 ◽  
Vol 22 (1) ◽  
pp. 228-228
Author(s):  
R. C. Seymour ◽  
J. B. Campbell ◽  
R. J. Wright
Keyword(s):  
Pest Control ◽  
European Corn Borer ◽  
Spider Mites ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Corn Borer ◽  
Field Corn ◽  
Naturally Occurring ◽  
Plot Yield ◽  
Pollen Shed

Abstract Insecticides were applied by fixed wing airplane to field corn in the pollen shed stage on 1 Aug. All treatments were applied in water with 1.5 oz/acre Dynamic surfactant. Capture was applied at 0.08 lb Al/acre in total volumes of 1 gpa, 3 gpa and 5 gpa. Penncap-M was applied at 0.625 lb Al/acre in a total volume of 1 gpa. The plots were 120 ft wide and field length. Each treatment was replicated two times and arranged in a RCB design. Corn rootworm (CRW) beetles were counted on five plants in one row, each plant separated by four plants. Five leaves, on each of three plants, were evaluated for the presence of naturally occurring twospotted spider mites (TSM). Four plants in each plot were artificially infested with TSM 14 DAT. Five leaves on each of these plants were rated for mite colonies 21 and 28 DAT. European corn borer (ECB) damage was evaluated 86 DAT by splitting from root to tassel ten plants from each plot. Yield was determined by hand harvesting and shelling all ears from 40 ft of row.

scholarly journals Mycotoxin contamination in maize triggered by arthropod pests and the related protection possibilities

2017 ◽  
pp. 59-64
Author(s):  
Dávid Horváth
Keyword(s):  
Climate Change ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Animal Health ◽  
Mechanical Damage ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Corn Borer ◽  
Mycotoxin Contamination ◽  
Arthropod Pests

Mycotoxin contamination in harvested maize has increased in the last decades, which can be unequivocally back to the plant health troubles caused by global warming. The increasing of wounds in maize crops was occurred by climate change both on direct (hailstorm) and indirect(newly appeared pests) ways. In additional, the settling phytopathogenic microfungi on these plant wounds inflict serious human and animal health problems.The changing of Hungarian arthropod pests assemblages stand in the background of this dangerous nuisance complex. The spreading of European corn borer (Ostrinia nubilalis Hbn.) bivoltine ecotype as well as the newly appeared adventive species [cotton bollworm Helicoverpa armigera Hbn.), western corn rootworm (Diabrotica v. virgifera LeConte), fourspotted-sapbeetle (Glischrochilus quadrisignatus Say)] in Hungary can be responsible for this situation. In total, all technological elements, which obstruct the damage of these chewing mouthparts pests, as well as moderate the mechanical damage of maize, can be contribute to the reduction of both these phytopathogens injuries and mycotoxin contaminations.

scholarly journals Control of European Corn Borer Larvae and Effect on Spider Mites on Reproductive Stage Field Corn, 1995

1997 ◽  
Vol 22 (1) ◽  
pp. 228-229
Author(s):  
R. C. Seymour ◽  
J. B. Campbell ◽  
R. J. Wright
Keyword(s):  
European Corn Borer ◽  
Spider Mites ◽  
Reproductive Stage ◽  
Corn Borer ◽  
Field Corn

scholarly journals Insecticide Control of Western Corn Rootworm Beetles, 1995

1996 ◽  
Vol 21 (1) ◽  
pp. 225-226
Author(s):  
R. C. Seymour ◽  
J. B. Campbell ◽  
R. J. Wright
Keyword(s):  
Spider Mites ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Pesticide Application ◽  
Field Corn ◽  
Insecticide Control

Abstract Various pesticides were applied to milk stage (R7 stage) field corn on 14 Aug., near North Platte, NE. The treatments were applied with a CO2-charged backpack sprayer through 8001 flat fan nozzles at 30 psi (206, 786 Pa), in a total volume of 21 gal/acre (196.4 liter/ha). Each treatment was applied to 3 X 10 m plots, replicated 4 times, in a RCB design. Three days before the pesticide application the number of WCRW were counted on 4 randomly selected plants in the middle of each plot. In addition, the presence of spider mites was evaluated on the same plants by inspecting leaves below the ear leaf for colonies the size of a quarter or larger. The number of WCRW and the number of mite infested leaves were evaluated 3 and 14 DAT on 4 different randomly selected plants in the middle of each plot. In addition to counting the number of mite infested leaves, the size of the mite colonies was rated on a 0-6 scale, on the 3 lowest leaves of 4 different randomly selected plants 14 DAT.

Potential of controlling insect pests of corn using entomopathogenic nematodes

2001 ◽  
Vol 81 (4) ◽  
pp. 783-787 ◽  
Author(s):  
E. Riga ◽  
J. Whistlecraft ◽  
J. Potter
Keyword(s):  
European Corn Borer ◽  
Entomopathogenic Nematodes ◽  
Insect Pests ◽  
Insect Pest ◽  
Fall Armyworm ◽  
Nematode Species ◽  
Western Corn Rootworm ◽  
Corn Rootworm ◽  
Pest Species ◽  
Corn Borer

A series of experiments was performed in the laboratory and in the greenhouse to assess the efficacy of the entomopathogenic nematodes, Steinernema glaseri or S. feltiae in decreasing the numbers of European corn borer, fall armyworm, western corn rootworm and the seedcorn maggot in corn. Both nematode species effectively controlled the four insect pest species. During greenhouse experiments, the number of plants protected with entomopathogenic nematodes against these insect pests was significantly higher than in the untreated controls. Similar results were obtained in a microplot study of corn infected with the European corn borer, the western corn rootworm and the seedcorn maggot. The application of a single nematode species against several insect pests has economic advantages. In addition, both S. glaseri and S. feltiae overwintered and survived in the field until the next growing season. Key words: Entomopathogenic nematodes, sweet corn, European corn borer, fall armyworm, seedcorn maggot, western corn rootworm

scholarly journals Maize inbred line B96 is the source of large-effect loci for resistance to generalist but not specialist spider mites

2021 ◽  
Author(s):  
Huyen Bui ◽  
Robert Greenhalgh ◽  
Gunbharpur S. Gill ◽  
Meiyuan Ji ◽  
Andre H. Kurlovs ◽  
...  
Keyword(s):  
Zea Mays ◽  
Tetranychus Urticae ◽  
European Corn Borer ◽  
Spider Mite ◽  
Insect Pests ◽  
Spider Mites ◽  
Mite Species ◽  
Chromosome 1 ◽  
Corn Borer ◽  
Oligonychus Pratensis

AbstractMaize (Zea mays subsp. mays) yield loss from arthropod herbivory is substantial. While the basis of resistance to major insect herbivores has been comparatively well-studied in maize, less is known about resistance to spider mite herbivores, which are distantly related to insects and feed by a different mechanism. Two spider mites, the generalist Tetranychus urticae, and the grass-specialist Oligonychus pratensis, are notable pests of maize, especially during drought conditions. We assessed the resistance to both mite species of 38 highly diverse maize lines, including several previously reported to be resistant to one or the other mite species. We found that line B96, as well as its derivatives B49 and B75, were highly resistant to T. urticae. In contrast, neither these three lines, nor any others included in our study, were notably resistant to O. pratensis. Quantitative trait locus (QTL) mapping with F2 populations from crosses of B49, B75, and B96 to susceptible B73 identified a large-effect QTL on chromosome 6 as underlying T. urticae resistance in each line, with an additional QTL on chromosome 1 in B96. Genome sequencing and haplotype analyses identified B96 as the apparent sole source of resistance haplotypes. Our study identifies loci for use in maize breeding programs for T. urticae resistance, as well as to assess if the molecular-genetic basis of spider mite resistance is shared with insect pests of maize, as B96 is also among the most resistant known maize lines to several insects, including the European corn borer, Ostrinia nubilalis.Key message Maize(Zea mays subsp. mays) inbred lines B49, B75, and B96 harbor large-effect loci for resistance to the generalist spider mite Tetranychus urticae, but not the specialist Oligonychus pratensis.

Corn Rootworm and European Corn Borer Control in Pennsylvania, 1992

1994 ◽  
Vol 19 (1) ◽  
pp. 216-216
Author(s):  
D. D. Calvin ◽  
P. B. Rebarchak ◽  
S. M. Spangler ◽  
G. W. Roth ◽  
L. Hoffman ◽  
...  
Keyword(s):  
European Corn Borer ◽  
Granular Soil ◽  
Corn Rootworm ◽  
Silt Loam ◽  
Corn Borer ◽  
Silt Loam Soil ◽  
The Press ◽  
Loam Soil ◽  
Rock Springs

Abstract Thirteen corn rootworm granular soil insecticide treatments were evaluated on a Hagerstown silt loam soil near Rock Springs, PA, during 1992. A RCBD with 5 replications was used. Insecticides and rates were applied in-furrow or as a T-band application. Plots were 39 ft × 5 ft wide (2 rows). Treatments were applied using a Max Emerge John Deere 7000® corn planter on 20 May. T-band applications were applied in 7 inch bands over the row and into the furrow ahead of the press wheel, and in-furrow applications were directed into furrow in front of the press wheel.

132 Note: Errata and Extensions for "The Distribution of the European Corn Borer Larvae Pyrausta nubilalis (Hbn.), in Field Corn"

Biometrics ◽  
1958 ◽  
Vol 14 (3) ◽  
pp. 432 ◽  
Author(s):  
Judson U. McGuire ◽  
Tom A. Brindley ◽  
T. A. Bancroft
Keyword(s):  
European Corn Borer ◽  
Corn Borer ◽  
Field Corn ◽  
Pyrausta Nubilalis

Rate of European Corn Borer (Lepidoptera: Pyralidae) Egg-mass Detrition in Field Corn

1986 ◽  
Vol 15 (4) ◽  
pp. 817-820
Author(s):  
D. D. Calvin ◽  
M. C. Knapp ◽  
Kuang Xingquan ◽  
F. L. Poston ◽  
S. M. Welch
Keyword(s):  
European Corn Borer ◽  
Egg Mass ◽  
Corn Borer ◽  
Field Corn ◽  
Lepidoptera Pyralidae
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