In Vitro Evaluation of Bacterial Biocontrol Agents and Botanicals against Alternaria Leaf Spot Caused by Alternaria macrospora in Cotton

Prasad, B. Mohan Venkata Siva; Bhattiprolu, S. L.; Kumari, Vedna; Kumar, Prateek

doi:10.20546/ijcmas.2017.611.088

Cited by 2 publications

(3 citation statements)

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“…Some of them are monophagous species, restricted to the genus Gossypium (Anthonomus, Diaparopsis) while oligophagous feeding on plants in the family of Malvaceae and closely related families (Pectinophora, Dysdercus, Earias) or polyphagous feeding behavior (Helicoverpa, Heliothis, Cryptophlebia, Spodoptera, Helopeltis) were also reported. The heliothine lepidopteran species complex (Heliothis virescens, Helicoverpa armigera, Helicoverpa zea) is considered as the most dangerous, found attacking numerous other cultivated plants which are often associated with cotton in a range of cropping systems [41]. However, as indicated earlier, the leaf hoppers and white fly are becoming a menace nowadays.…”

Section: International Levelmentioning

confidence: 99%

High Density Planting System of Cotton in India: Status and Breeding Strategies

Kumar¹,

Premalatha²,

Mahalingam³

et al. 2021

Plant Breeding - Current and Future Views

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Cotton, a crop of choice, occupies the second premier position next to food crops in providing clothing. Though 53 species of Gossypium are available, only four species are cultivable and among the four, the major cultivable area falls under G. hirsutum. Though varieties with medium, superior medium, long and extra long staple cotton were released earlier, with the advent of machineries, ginning facilities, mills were literally requiring cotton fiber of any length. With the advent of Bt technology and the release of hybrids during 2002, cotton productivity had a momentum. However, considering the duration, cost involved in manual harvesting etc., farmers were looking for alternate option and High Density Planting System (HDPS) offered a promise in this direction. Farmers were looking for genotypes that could yield better under higher planting densities with fewer bolls per plant, synchronized maturity with uniform bursting. Efforts have been taken all over the World in this direction and India is not an exception. Handful of varieties fitting to this situation has been released from many of the Universities. This chapter essentially summarizes the genetic, agronomic, plant protection interventions and the futuristic requirements for achieving at least 700 kg of lint per hectare.

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Section: International Levelmentioning

confidence: 99%

High Density Planting System of Cotton in India: Status and Breeding Strategies

Kumar¹,

Premalatha²,

Mahalingam³

et al. 2021

Plant Breeding - Current and Future Views

View full text Add to dashboard Cite

show abstract

“…Earlier researchers had also exploited usefulness of Bacillus subtilis a bioagent was evaluated against A. macrospora of cotton using dual culture technique and substantially inhibited the mycelial growth (73.66%) of the test fungus in vitro [19]. B. subtilis strain 1 was evaluated in vitro against Alternaria leaf spot pathogen of cotton using dual culture technique significantly inhibited the mycelial growth (51.68%) of the test fungus over untreated control [6].…”

Section: Antifungal Action By Dual Culture Techniquementioning

confidence: 99%

“…There are some evidences in which antagonistic bacteria and fungi used as biocontrol agents, such as Trichoderma sp. [5,6] Pseudomonas sp. [7,8], and Bacillus sp.…”

Section: Introductionmentioning

confidence: 99%

In vitro biocontrol scenarios of Bacillus amyloliquefaciens subsp. amyloliquefaciens strain RLS19 in response to Alternaria macrospora, an Alternaria leaf spot phytopathogen of Bt cotton

Shrirangrao¹,

Raosaheb²,

Shankarrao³

2021

J App Biol Biotech

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Alternaria macrospora (Zimm.) is most critical phytopathogen causing Alternaria leaf spot disease of transgenic cotton having regional, national, and international significance. In the present research work, Bacillus amyloliquefaciens subsp. amyloliquefaciens strain RLS19 previously isolated from rhizospheric niches of healthy of Bt cotton plant was screened against A. macrospora by dual culture technique. Bacillus sp. significantly killed the radial mycelial growth of A. macrospora, that is, 98.08%. On finding the mechanism, it was revealed that B. amyloliquefaciens subsp. amyloliquefaciens strain RLS19 produced diffusible non-volatile secondary metabolites, siderophore, and chitinase enzyme which make contributions to inhibit the mycelial growth of A. macrospora during dual culture screening. In addition, the gas chromatography-mass spectrometry evaluation of crude extract discovered the presence of three bioactive compounds specifically acetamide, N-methyl-N-[4-(3-hydroxypyrrolidinyl)-2-butynyl]-; pyrrolo[1,2-a] pyrazine-1,4-dione, hexahydro-, and 2,5-Piperazinedione, 3,6-bis(2-methylpropyl)-with the outstanding antimicrobial antibacterial and antifungal activity which contributed in the inhibition of A. macrospora.

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In Vitro Evaluation of Bacterial Biocontrol Agents and Botanicals against Alternaria Leaf Spot Caused by Alternaria macrospora in Cotton

Cited by 2 publications

References 1 publication

High Density Planting System of Cotton in India: Status and Breeding Strategies

High Density Planting System of Cotton in India: Status and Breeding Strategies

In vitro biocontrol scenarios of Bacillus amyloliquefaciens subsp. amyloliquefaciens strain RLS19 in response to Alternaria macrospora, an Alternaria leaf spot phytopathogen of Bt cotton

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