Evaluation of Insecticides for Control of Insect Pests in Sweet Corn, 2003

Cordero, Roberto J.; Kuhar, Thomas P.; Speese, John; Barlow, Vonny M.

doi:10.1093/amt/29.1.e29

Cited by 3 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ear damage was consistently reduced by spinosad, although numbers of corn earworms per ear were reduced in only two of the four years in which spinosad was tested. Previous reports have shown spinosad to provide control of corn earworms on sweet corn comparable to that given by pyrethroid insecticides ( Cordero et al 2004 ; Lance and All 2004 , 2005 ; Edelson and Mackey 2006 ).…”

Section: Discussionmentioning

confidence: 90%

“…Field corn that expresses a Cry1Ab δ-endotoxin is typically highly resistant to the corn earworm, but is less resistant to the fall armyworm ( Abel and Pollan 2004 ; Chilcutt et al 2006 , 2007 ). Substantial damage by the corn earworm to transgenic field corn can sometimes occur, however ( Chilcutt et al 2006 , 2007 ). Sweet corn has also been transformed with Cry1Ab genes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Supplemental Control of Lepidopterous Pests on Bt Transgenic Sweet Corn with Biologically-Based Spray Treatments

Farrar

Shepard²,

Shapiro³

et al. 2009

Journal of Insect Science

View full text Add to dashboard Cite

Biologically-based spray treatments, including nucleopolyhedroviruses, neem, and spinosad, were evaluated as supplemental controls for the fall armyworm, Spodoptera frugiperda (J. E. Smith), and corn earworm, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), on transgenic sweet corn, Zea mays (L.) (Poales: Poaceae), expressing a Cry1Ab toxin from Bacillus thuringiensis Berliner (Bacillales: Bacillaceae) (Bt). Overall, transgenic corn supported lower densities of both pests than did nontransgenic corn. Control of the fall armyworm was improved in both whorl-stage and tassel-stage corn by the use of either a nucleopolyhedrovirus or neem, but the greatest improvement was seen with spinosad. Only spinosad consistently reduced damage to ears, which was caused by both pest species. In general, efficacy of the spray materials did not differ greatly between transgenic and nontransgenic corn.

show abstract

Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Supplemental Control of Lepidopterous Pests on Bt Transgenic Sweet Corn with Biologically-Based Spray Treatments

Farrar

Shepard²,

Shapiro³

et al. 2009

Journal of Insect Science

View full text Add to dashboard Cite

show abstract

“…Overall, Entrust, applied at the standard 71.2 g a.i./h rate, provided the most effective control of CEW compared to the other treatments. Since Entrust was approved for organic use in 2003, other studies have reported effective control with Entrust [ 146 , 147 , 148 , 149 ], and fact sheets on organic sweet corn recommend Entrust as the most effective option for CEW control [ 15 , 150 ]. However, our results show that ear protection with Entrust varied depending on the spray interval and number of applications.…”

Section: Resultsmentioning

confidence: 99%

“…The Bt product, Deliver, applied alone and mixed with vegetable oil injections in the silk tube, also gave unsatisfactory control in a 2002 trial [ 152 ], which agrees with other studies that have shown inconsistent results with the ear tip injection technique, when CEW pressure is high [ 153 , 154 , 155 ]. Because Bt insecticides require ingestion and degrade rapidly in sunlight, trials testing foliar sprays have also reported unsatisfactory control of lepidopteran larvae in sweet corn [ 147 , 148 , 156 ].…”

Section: Resultsmentioning

confidence: 99%

Comparative Efficacy of Common Active Ingredients in Organic Insecticides Against Difficult to Control Insect Pests

Dively

Patton

Barranco

et al. 2020

Insects

View full text Add to dashboard Cite

There exists a lack of control efficacy information to enable decision-making about which organic insecticide product works best for a given insect pest. Here, we summarize results of 153 field trials on the control efficacy of common active ingredients in organic insecticides against 12 groups of the most difficult to control insect pests. These trials evaluated primarily the organic products Entrust (spinosad), Azera (pyrethrin and azadirachtin), PyGanic (pyrethrin) and Neemix (azadirachtin), which reduced pest infestations by an overall 73.9%, 61.7%, 48.6% and 46.1% respectively, averaged across all trials. Entrust was the most effective control option for many insect pests, particularly providing >75% control of flea beetles, Colorado potato beetle, cabbageworms and alfalfa weevil, but was relatively ineffective against true bugs and aphids. Azera provided >75% control of green peach aphid, flea beetles, Japanese beetle, Mexican bean beetle, potato leafhopper and cabbageworms. PyGanic was less effective than Entrust and Azera but still provided >75% control of green peach aphid, flea beetles and potato leafhopper. The growth inhibition effects of azadirachtin in Neemix were particularly effective against larvae of Mexican bean beetle and Colorado potato beetle but was generally less effective in trials with insect infestations consisting mainly of adult stages. Those insect pests that were particularly difficult to control included thrips, stinkbugs, cucumber beetles and fruitworms. Several caveats pertaining to the application of the results are discussed.

show abstract