Suspension concentrate formulation ofBacillus thuringiensisvar.kurstakifor effective management ofHelicoverpa armigeraon sunflower (Helianthus annuus)

Devi, P. S. Vimala; Vineela, V.

doi:10.1080/09583157.2014.977846

Cited by 14 publications

(6 citation statements)

References 10 publications

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“…Among the seven inorganic salts (sodium carbonate, potassium carbonate, calcium carbonate, zinc sulphate, calcium chloride, magnesium sulphate and boric acid) tested, only boric acid increased the potency of Bt from 40% larval mortality caused by Bt alone to 60% when the Bt spray was mixed with boric acid. The potency‐enhancing effect of boric acid with Bt has also been reported against tobacco cutworm Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae) (Govindarajan et al, ), gypsy moth larvae Lymantria dispar (Linnaeus) (Lepidoptera: Lymantriidae) (Charles & Wallis, ), bertha armyworm larvae Mamestra configurata Walker (Lepidoptera: Noctuidae) (Morris et al, ) and African bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) (Sabbour et al, ; Vimala Devi & Vineela, ). Boric acid is used as a stomach poison and contact insecticide (Cisneros et al, ; Xue & Barnard, ; Zurek et al, ).…”

Section: Discussionmentioning

confidence: 87%

“…kurstaki ‐based product, Halt®, was reported. Several authors aimed at increasing the efficacy of Bt sprays by incorporating chemical additives (El‐Moursy, Aboul‐Ela, Salama, & Abdel‐Razek, ; Gibson, Gallo, Krasnoff, & Ketchum, ; Govindarajan, Jayaraj, & Narayanan, ; Morris, Converse, & Kanagaratnam, ; Sabbour, Abdel‐Hakim, & Abdou, ; Salama, Abd El‐Baset, & Ragaei, ; Salama, Foda, & Sharaby, , , , ; Salama et al, ; Vimala Devi & Vineela, ; Zhang et al, ). Addition of ethylenediaminetetraacetate (EDTA) to Bt spray against Indian meal moth, Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae), greasy cutworm, Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae), and diamondback moth provided synergistic effects and improved its efficacy against these pests (El‐Moursy et al, ; Liu & Tabashnik, ; Salama et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Chemical additives enhance the activity of a Bt‐based biopesticide targeting the beet webworm larvae

Opisa

Akutse

Plessis

et al. 2019

J Applied Entomology

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Spoladea recurvalis (Fbr.) (Lepidoptera: Crambidae) larvae can cause up to 100% foliage loss on amaranths during severe outbreaks. The Bacillus thuringiensis Subsp. kurstaki product Halt® is a biologically safe biopesticide recommended for the management of Spodoptera exigua (Hübner) and Plutella xylostella (Linnaeus). Spoladea recurvalis larvae are less susceptible to the product. Thirteen chemical additives to improve the efficacy of a Bt spray for control of S. recurvalis were evaluated in laboratory bioassays against second‐instar larvae. All the additives except calcium chloride caused an increase in mortality when applied in mixtures with Bt. Among the seven inorganic salts, boric acid was the only inorganic acid that caused more than 50% larval mortality. Boric acid at a concentration of 0.05% increased the activity of B. thuringiensis by 2.9‐fold. Boric acid had the shortest LT50 values of 5.3 days compared with all other combinations. Two nitrogenous compounds, peptone and sodium nitrate, caused 54 and 51% larval mortalities; however, this increase in efficacy was not significantly different from the mortalities caused by Bt applied without any additive. Urea increased larval mortality from 40% to 51%, although the increase was not significant from a Bt spray application only. Citric acid had no significant effect on the efficacy of Bt spray against S. recurvalis larvae. Overall, among the additives evaluated, the efficacy of Bt spray was most enhanced by boric acid and could be further evaluated under field conditions for validation, and integration into an Integrated Pest Management (IPM) strategy for S. recurvalis management.

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Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Chemical additives enhance the activity of a Bt‐based biopesticide targeting the beet webworm larvae

Opisa

Akutse

Plessis

et al. 2019

J Applied Entomology

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“…The Efficacy of Bt. kurstaki was found to increase with the decrease in particle size, against larvae of H. armigera (Devi and Vineela, 2015) [18] .…”

Section: Biological Controlmentioning

confidence: 99%

Review on different biocontrol agents used in control of Helicoverpa armigera (Hubner)

Dwivedi¹,

Ramireddy²

2020

Int. J. Chem. Stud.

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H. armigera is a major polyphagous pest for agricultural and horticultural crops. It has wide range of host plants. It is difficult to control due to its polyphagous nature, high fecundity, mobility and diapause. The control of Helicoverpa armigera mainly depend on chemicals, but heavy and continuous use of it lead to resistance to different group of insecticides like cyclodienes, pyrethoids, carbamates and organophosphates. To avoid this resistance we should focus on other methods of control like host plant resistance like non-preference, antibiosis and tolerance. Cultural operations like right time of sowing, ploughing, nutrient management, spacing, crop rotation and biological control by using egg parasitoids like Trichogramma chilonis, larval parasitoids like Compolestis chlorideae, bacteria like Bacillus thuringensis, fungi like Beauveria bassiana and virus like HaNPV.

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“…In India, numerous Btk formulations are used to combat bollworms, loopers, and other lepidopteran pests. In Andhra Pradesh (Kumara et al, 2016 ), Telangana (Vimala Devi and Vineela, 2015 ), and Punjab (Kumar and Kaur, 2017 ), for example, liquid Btk formulations have been effectively tested and used to manage Helicoverpa armigera and noctuid pests in pigeon pea. In sugarcane in Tamilnadu, commercial formulations (Delfin, Biobit, Dipel, and Halt) decreased the shoot borer, Chilo infuscatellus , below economic limits (Kesavan et al, 2003 ).…”

Section: Entomopathogenic Bacteriamentioning

confidence: 99%

Entomopathogen-based biopesticides: insights into unraveling their potential in insect pest management

et al. 2023

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Global food security is a critical challenge to fulfill the demands of an exponentially growing population. To date, growers rely on chemicals; the broad-spectrum application of synthetic molecules leads to environmental contamination, resistance development, residual toxicity, pest resurgence, and a detrimental effect on human health and cattle. Crop production needs to be improved considering environmental and human health concerns to ensure food security. Furthermore, economically important crops are prone to attack by insect pests, causing considerable yield losses. Microbes are an eco-friendly, versatile alternative, and a potential candidate for combatting destructive pests below the economic injury level and improving the plant's health and productivity. Several microbial pathogens, including parasites, predators, parasitoids, pollinators, and many beneficial microorganisms, possess toxic properties against target organisms but do not cause harm to the non-target organisms. Entomopathogens (ENMs) have great potential for pest suppression due to their remarkable properties. Bacteria are host-specific, but fungi have a broader host range and can be significantly affected by both soil-dwelling and terrestrial insect pests. Virulent pathogens cause mortality in target insect pests known as ENMs and can penetrate through natural openings, ingestions, and integuments to cause a possible effect on target insect pests. The objective of using ENMs is to sustain productivity, improve environmental health, reduce pesticides, and conserve natural resources. Moreover, research is ongoing to discover other possible aspects, especially exploring potential ENMs. Therefore, there is a need for identification, isolation, and bioformulation to overcome the existing issues. This study is mainly focused on the status of bio-formulations, pathogenicity, their mode of action, and the potential application of different types of microbial formulations for sustainable pest management.

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Suspension concentrate formulation ofBacillus thuringiensisvar.kurstakifor effective management ofHelicoverpa armigeraon sunflower (Helianthus annuus)

Cited by 14 publications

References 10 publications

Chemical additives enhance the activity of a Bt‐based biopesticide targeting the beet webworm larvae

Chemical additives enhance the activity of a Bt‐based biopesticide targeting the beet webworm larvae

Review on different biocontrol agents used in control of Helicoverpa armigera (Hubner)

Entomopathogen-based biopesticides: insights into unraveling their potential in insect pest management

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