scholarly journals FLEA BEETLE CONTOL WITH INSECTICDES ALLOWED FOR ORGANIC PRODUCTION, 2012

2013 ◽  
Vol 38 (1) ◽  
Author(s):  
Abby Seaman ◽  
Holly Lange ◽  
Anthony M. Shelton
Keyword(s):  
Flea Beetle ◽  
Organic Production

scholarly journals Evaluation of Biorational Insecticides as Stand-alone Treatments for the Management of the Pigweed Flea Beetle, Disonycha glabrata (Coleoptera: Chrysomelidae), in Organic Production of Amaranthus spp.

2020 ◽  
Vol 9 (3) ◽  
pp. 58
Author(s):  
Roger V. Vorsah ◽  
Beatrice N. Dingha ◽  
Harmandeep Sharma ◽  
Louis E. Jackai
Keyword(s):  
Field Experiments ◽  
Insect Pest ◽  
Flea Beetle ◽  
Organic Production ◽  
Leaf Damage ◽  
Growing Seasons ◽  
Action Threshold ◽  
Treatment Action ◽  
Amaranthus Spp ◽  
Beetle Damage

The pigweed flea beetle, Disonycha glabrata, is the most damaging insect pest on Amaranthus spp. in the Piedmont zone of North Carolina (NC), United States. It is capable of causing severe yield loss on amaranth greens if uncontrolled. Field experiments were conducted over two growing seasons (Summer 2017 and 2018) in Greensboro, NC, to evaluate OMRI-approved biorational insecticides against D. glabrata in organic amaranth production. Insecticides evaluated included Azatin® O (azadiractin), Ecotec® (oils: rosemary, peppermint and geraniol), Entrust® (spinosad) and PyGanic® (pyrethrins) as stand-alone threshold-driven treatments applied at recommended label rates. Insecticide treatment action threshold (AT) was 2 (on a scale of 5) representing 20-40% leaf damage. The efficacy of the insecticides against D. glabrata population differed significantly within the amaranth varieties in comparison to their respective controls: treatments with Entrust® and PyGanic® on Green Callaloo and Red Leaf recorded 80% reduction in beetle population while Ecotec® gave only a 15% beetle reduction. The Azatin® O treatments recorded the highest D. glabrata population, sometimes greater than the control. Marketable fresh leaf yield from both Green Callaloo and Red Leaf amaranth was highest in the Entrust® and PyGanic® treatments. Hopi Red-Dye and Molten Fire amaranths showed some resistance to beetle damage; they are also intrinsically low yielding. These findings provide information that would make organic amaranth production possible with only limited and safe insecticide input using OMRI-approved insecticides in a threshold-driven manner, an important step towards the sustainable management of D. glabrata and amaranth production.

EVALUATION OF CONTROLS FOR FLEA BEETLE ON EGGPLANT IN AN ORGANIC PRODUCTION SYSTEM

2004 ◽  
pp. 341-346 ◽  
Author(s):  
M. Maletta ◽  
W. Tietjen ◽  
G. Ghidiu ◽  
K. Holmstrom ◽  
W. Cowgill
Keyword(s):  
Production System ◽  
Flea Beetle ◽  
Organic Production

scholarly journals CRUCIFER FLEA BEETLE CONTROL WITH INSECTICIDES ALLOWED FOR ORGANIC PRODUCTION, 2013

2014 ◽  
Vol 39 (1) ◽  
Author(s):  
Abby Seaman ◽  
Holly Lange ◽  
Anthony M. Shelton
Keyword(s):  
Flea Beetle ◽  
Organic Production ◽  
Crucifer Flea Beetle

scholarly journals Organic Mulch Increases Insect Herbivory by the Flea Beetle Species, Disonycha glabrata, on Amaranthus spp.

Insects ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 162
Author(s):  
Roger V. Vorsah ◽  
Beatrice N. Dingha ◽  
Sudan Gyawaly ◽  
Sarah A. Fremah ◽  
Harmandeep Sharma ◽  
...  
Keyword(s):  
North Carolina ◽  
Pest Management ◽  
Insect Pests ◽  
Flea Beetle ◽  
Building Blocks ◽  
Organic Production ◽  
Leaf Damage ◽  
Yield Reduction ◽  
Vegetable Production ◽  
Amaranthus Spp

Amaranth (Amaranthus spp.) is an increasingly high-valued niche vegetable crop among small organic growers in North Carolina, due to its increasing demand among diverse immigrant groups. Production is however hampered by insect pests such as the flea beetle (FB), Disonycha glabrata (Coleoptera: Chrysomelidae), that cause significant yield reduction. Chemical insecticides are generally applied for pest control despite their known risks to health and the environment. Integrated pest management (IPM), which is a cost effective and environmentally friendly approach is still under-exploited in vegetable production by small growers. We studied IPM approaches, suitable for organic production of amaranth by screening nine amaranth varieties for resistance to the flea beetle (FB), D. glabrata, grown with, and without, mulch. D. glabrata population was 60% higher in plots with mulch compared to plots without. The amaranth varieties Molten fire and Green Callaloo recorded the lowest and the highest beetle population commensurate with low, and high leaf damage, respectively. Conversely, leaf yields in the mulched plots were 50% less than recorded in the zero-mulch counterpart, with Green Callaloo variety recording the lowest. These findings will serve as building blocks for a sustainable pest management plan that is appropriate for organic production of Amaranthus spp. in North Carolina.

scholarly journals The Impact of Plant Essential Oils and Fine Mesh Row Covers on Flea Beetle (Chrysomelidae) Management in Brassicaceous Greens Production

Insects ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 714
Author(s):  
Robert Brockman ◽  
Ryan Kuesel ◽  
Kendall Archer ◽  
Kyla O'Hearn ◽  
Neil Wilson ◽  
...  
Keyword(s):  
Essential Oils ◽  
Flea Beetle ◽  
Organic Production ◽  
Plant Essential Oils ◽  
Leafy Greens ◽  
Row Covers ◽  
Fine Mesh ◽  
Flea Beetles ◽  
Spray Control ◽  
The Impact

Brassicaceous leafy greens are an important crop for small growers but are difficult to produce due to damage by flea beetles. Flea beetles are problematic for growers as they chew many small holes through leaves rendering produce unmarketable. We tested the efficacy of several essential oils, the woven-mesh row cover ProtekNet, and the spunbonded row cover Agribon, compared to organic and conventional insecticides and no spray controls in the spring and fall of 2019. We found that the two row cover treatments (Agribon and ProtekNet) provided the best control of flea beetles and associated damage. Thyme oil was highly phytotoxic and killed the crop entirely and rosemary and neem essential oils caused mild phytotoxic burns. Organic insecticides rarely performed better than the no spray control. While conventional insecticides controlled most flea beetles, the crop was often still too highly damaged to sell. The results of our study suggest row covers offer producers an effective method of flea beetle control that reduces their dependence on insecticides for conventional and organic production.

scholarly journals Total Phenolic and Flavonoid Contents of Organically and Conventionally Grown Lettuce, Collards and Chinese Cabbage

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 863C-863
Author(s):  
Xin Zhao* ◽  
Janice E. Young ◽  
Ted Carey ◽  
Weiqun Wang
Keyword(s):  
Total Phenolic Content ◽  
Phenolic Content ◽  
Flea Beetle ◽  
Organic Production ◽  
Total Phenolic ◽  
Pak Choi ◽  
Significance Level ◽  
Phenolic Contents ◽  
Significant Difference ◽  
Phenolic And Flavonoid

Organic vegetables have been suggested to produce higher levels of phytochmemicals, which play active roles in disease prevention. We measured total phenolic and aglycone flavonoid (apigenin, kaempferol, luteolin, and quercetin) contents in leaves of organically- and conventionally-grown lettuce (`Kalura' and `Red Sails'), collards (`Top Bunch') and Pak Choi (`Mei Qing') greens during spring and summer trials, using the Folin assay and HPLC, respectively. Postharvest changes in phenolic contents of organic and conventional lettuce were also investigated after 17-day storage at 4 °C. Production system did not cause a significant difference in total phenolic levels of lettuce and collards in either trial, but total phenolics were significantly higher in organic Pak Choi in the summer trial, possibly due to greater flea beetle damage in the organic plots. Organic production did not affect the aglycone flavonoid levels of lettuce and collards in the spring trial except that apigenin increased in organic samples. In the summer trial, however, concentrations of kaempferol, luteolin and quercetin tended to increase in organic lettuce and collards; only luteolin showed promising increase in Pak Choi. Species and cultivars both had significant effects on total phenolic and flavonoid contents. After 17-day storage, total phenolic content significantly increased in both organic and conventional lettuce although the concentrations of aglycone flavonoids remained relatively constant. Total phenolic content was higher in organic `Red Sails' at a marginal significance level after storage, while it did not differ between organic and conventional `Kalura'. We noted a dominant presence of glycoside flavonoids in lettuce before and after storage, which warrants further study.

Herbicides compromise biological control of ragwort

2002 ◽  
pp. 147-152
Author(s):  
K. Betteridge ◽  
D. Costall
Keyword(s):  
Biological Control ◽  
Pyrrolizidine Alkaloids ◽  
Animal Health ◽  
Flea Beetle ◽  
Dairy Farm ◽  
Senecio Jacobaea ◽  
Longitarsus Jacobaeae ◽  
High Ester ◽  
Low Levels

In spite of ragwort flea beetle (RFB) being present on a Dannevirke dairy farm, pastures were sprayed each winter to reduce ragwort density and limit the risk of ragwort poisoning of stock. The trial on this farm from June 1999 - October 2001, aimed to determine whether herbicide (H) impacted on RFB and how H and RFB each impacted on ragwort growth and persistence. RFBfree areas were created by spraying with insecticide (I). Effects of ragwort on animal health are also reported. High ester 2,4-D (H) boom-sprayed once only, in June 1999, killed most ragwort plants and reduced RFB larvae densities to low levels before the plants died. Once new ragwort established in treatment H, the plants became infested with RFB larvae. RFB larvae were suppressed by I resulting in ragwort density declining more slowly than in treatments where RFB were not suppressed. Insecticide treatments were stopped after 15 months and, at 24 months, ragwort could not be found within the trial area. Ragwort control was attributed to the cessation of herbicide spraying allowing the RFB population to reach a sufficient density to kill both small and large ragwort plants. Sub-clinical ragwort poisoning was found in livers of culled cows that had grazed on ragwort-dense pastures. Keywords: animal health, biological control, Longitarsus jacobaeae, pyrrolizidine alkaloids, ragwort, ragwort flea beetle, Senecio jacobaea

Sign in / Sign up

Export Citation Format

Share Document