Cereal Leaf Beetle Control on Malting Barley, 1996

Abstract Malting barley was planted by a producer located near Edgar, MT on 13 Apr. Plots were 20 ft long and 8 rows wide (1 ft row spacing) and arranged in a RCB design with four replications (Trial 1) and 3 replications (Trial 2). Insecticide applications were made using a backpack, CO2-powered sprayer equipped with TeeJet XR8002VS nozzles, calibrated to deliver 8.2 gpa at 30 psi. Number of CLB eggs and larvae per plant were counted on 3 plants from center rows. Plots in Trial 1 were treated on 17 May when barley was at 2 to 3 tiller stage and evaluated on 1,3, and 11 DAT. No CLB larvae were detected until 28 May. A second trial was conducted to determine insecticide efficacy on CLB larvae. Plots in Trial 2 were treated on 4 Jun when barley was beginning to joint and evaluated on 1,3, 7, and 14 DAT. Data were analyzed using ANOVA and means were separated using DMRT.

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Evaluation of Selected Insecticides and Application Timings for Control of Cereal Leaf Beetle and Aphids on Wheat, 1997

Arthropod Management Tests ◽

10.1093/amt/23.1.308 ◽

1998 ◽

Vol 23 (1) ◽

pp. 308-308

Author(s):

G. F. Chappel ◽

D. A. Herbert

Keyword(s):

Experimental Design ◽

Growth Stage ◽

Leaf Beetle ◽

Post Treatment ◽

Row Spacing ◽

Application Timing ◽

Standard Testing ◽

Cereal Leaf Beetle ◽

Final Treatment ◽

Eggs And Larvae

Abstract Efficacy of selected insecticides and application timing was evaluated against CLB and aphids in wheat. Pioneer 2580 was planted 8 Nov in a producer’s field in Dinwiddie County, VA, using a 7-inch row spacing. All treatments were broadcast as foliar sprays with water using a CO2 pressurized backpack sprayer calibrated to deliver 20.0 gpa at 30 psi through 8004VS flat fan nozzles spaced 19 inches apart on the spray boom. A RCB experimental design was used with 4 replicates: plots were 17 rows by 50 ft. CLB sampling involved recording the number of eggs and larvae/ft2 (20.57 inches of a 7-inch row). Aphids were sampled by removing 5 randomly selected grain heads per plot. Samples were placed in a mild soapiwater solution (2 drops liquid dish detergent per gal water) for 10 minutes. Samples were then rinsed over a U.S.A. Standard Testing Sieve No. 60 mesh, and the total number of aphids per sample recorded. Defoliation was evaluated by removing 10 randomly selected flag leaves from each plot and visually recording the percent defoliation per leaf. Average percent defoliation was recorded per plot. Treatments 1-5 were applied at Zadok’s growth stage (GS) 31 (3 Apr), treatments 6-10 at Zadok’s growth stage 37 (23 Apr) and treatments 11-15 at Zadok’s growth stage 56 (6 May). Post-treatment CLB egg and larvals samples were taken 3 days after final treatment (9 May). Post-treatment aphid and defoliation samples were taken 24 days after final treatment (24 May).

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Spatial Distribution of Cereal Leaf Beetle (Oulema melanopus (L)) 1 Eggs and Larvae and Treatment of Count Data 2

Environmental Entomology ◽

10.1093/ee/9.2.186 ◽

1980 ◽

Vol 9 (2) ◽

pp. 186-189 ◽

Cited By ~ 3

Author(s):

Patrick A. Logan

Keyword(s):

Spatial Distribution ◽

Count Data ◽

Leaf Beetle ◽

Cereal Leaf Beetle ◽

Oulema Melanopus ◽

Eggs And Larvae

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Distribution and Seasonal Phenology of Cereal Leaf Beetle (Coleoptera: Chrysomelidae) on Wheat in Tennessee

Journal of Entomological Science ◽

10.18474/0749-8004-28.4.363 ◽

1993 ◽

Vol 28 (4) ◽

pp. 363-369 ◽

Cited By ~ 10

Author(s):

Jerome F. Grant ◽

Charles R. Patrick

Keyword(s):

Triticum Aestivum ◽

Triticum Aestivum L ◽

Leaf Beetle ◽

The State ◽

Economic Threshold ◽

Seasonal Incidence ◽

Cereal Leaf Beetle ◽

Oulema Melanopus ◽

Eggs And Larvae ◽

Experimental Plots

A three-year study was conducted to assess the distribution and seasonal incidence of cereal leaf beetle, Oulema melanopus (L.), on wheat, Triticum aestivum L., in Tennessee. Cereal leaf beetle was distributed across the state with populations most frequently encountered in eastern and middle Tennessee. Cereal leaf beetle adults were active in wheat fields during late March to early April; eggs were found from late March to early May; and larvae were found from early April to early June, peaking during mid May. In our experimental plots, larval densities exceeded the suggested economic threshold during each year. F1 adults emerged from late May to late June and fed approximately 2 wks on corn and other available Graminae plants. Adult activity then ceased; adults, eggs, and larvae were not encountered again until the following March and April.

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