Bio-efficacy of Heterorhabditis indica against Groundnut White Grub

Kamaliya, R.P.; Jethva, D. M.; Kachhadiya, N. M.; Ahir, Vinu R.; Vala, G. S.

doi:10.20546/ijcmas.2019.804.093

Cited by 3 publications

(1 citation statement)

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“…A continuación se activarán estos compuestos en condiciones in vivo, los cuales se verán implicados en la invasión del hemocele y la proliferación sistemática en todo el insecto hasta finalmente causar su muerte [12], [13]. Primordialmente, los microorganismos entomopatógenos son ingeridos por el insecto plaga, otro método de invasión es la penetración de la cutícula esto es realizado por determinados nematodos tales como: Steinernema sp y Heterorhabditis sp [22], [23], [24].…”

Section: Actividad Entomopatógenaunclassified

Principales microorganismos entomopatógenos de Tecia solanivora y sus mecanismos de acción

Guerra-Luran

Acero-Godoy

2021

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La papa (Solanum tuberosum) es uno de los cultivo de mayor importancia en Colombia y a nivel mundial, se destaca por ser una de las fuentes vegetales de proteínas y carbohidratos. S. tuberosum se ve afectado por una gran cantidad de plagas, entre ellas se encuentra Tecia solanivora, este importante fitopatógeno fue identificado en Guatemala - (Centroamérica). El presente artículo está centrado en exponer el control biológico utilizado para contrarrestar el ataque de T. solanivora, que abarca el uso de microorganismos y la producción de exo-productos microbianos. Actualmente los principales microorganismos antagónicos de T. solanivora son: Bacillus thuringiensis (Bt), granulovirus, y los nematodos Steinernema sp y Heterorhabditis sp. Para lograr la infección, estos microorganismos deben sobrevivir las condiciones adversas del ambiente, colonizar su entorno y finalmente evadir la respuesta inmune del huésped, lo anterior lo logran produciendo diferentes exo-productos con actividades antimicrobianas, líticas y tóxicas, entre otros. Esta importante característica le permite a un agricultor mantener las poblaciones del insecto a niveles inferiores.

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Section: Actividad Entomopatógenaunclassified

Principales microorganismos entomopatógenos de Tecia solanivora y sus mecanismos de acción

Guerra-Luran

Acero-Godoy

2021

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Formation of winter wheat productivity elements and their relation to sowing quality in the central part of the right-bank forest-steppe of Ukraine

Panchenko,

Grabovskiy,

Lozinskiy

et al. 2023

Agrobìologìâ

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This article presents the research results on "Zolotokolosa" winter wheat variety sowing quality and its impact on field emergence, tillering coefficient, and productive tiller formation. The studies showed that it is quite challenging to adjust the seeder for accurate sowing rate, and the deviation over the three-year research period reached up to 5.1 %. The accuracy of seed burial depth with disc drills was relatively low, fluctuating around an average of 4.24, 4.6, and 4.3 cm compared to the planned depth of 4.5 cm. However, significant variation was observed within designated plots during the vegetation period of 2018–2019 (3.4–5.2 cm), 2019–2020 (3.5–5.9 cm), and 2020–2021 (3.4–5.3 cm). Field emergence depended significantly on weather conditions and soil moisture, being favorable in 2018 and 2019 with rates of 95.3 % and 94.1 %, respectively. However, the summer-autumn drought negatively affected field emergence in 2020, resulting in a lower rate of 85.5 % compared to previous years. The depth of tillering node burial during the research period ranged from 1.85 to 1.9 cm. More significant fluctuations were observed within designated plots during the vegetation period, ranging from 1.5 to 2.2 cm. The correlation coefficient between seed burial depth and tillering node burial depth was positive (r = 0.554, r = 0.095, r = 0.237). The coefficient of productive tillering showed slight variation over the years of research. During the vegetation period of 2018–2019, it averaged 1.56, while in the subsequent years it was 1.60 and 1.54, respectively. The highest number of productive tillers, exceeding the sowing rate of 5.5 million seeds per hectare, was formed during the 2019–2020 vegetation period, with an average of 717.6 tillers/m2 . However, there was significant variation in this value within the designated plots, ranging from 605 to 869 tillers/m2 or 84.3 % to 121.1 % of the average density. In the 2018–2019 vegetation period, the average number of productive tillers was 709.4/m2 , with fluctuations within the designated plots ranging from 588 to 869 tillers/m2 or 82.1 % to 122.5 % of the average density. The lowest number of productive stalks of wheat was recorded in 2020–2021, which can be attributed to a relatively dry autumn vegetation period. On average, there were 646.8 tillers/m2 . The density fluctuated the most within the designated plots that year, ranging from 499 to 863 tillers/m2 or 77.1 % to 133.4 % of the average density. The research methods employed included field observation, laboratory analysis, comparative analysis, data synthesis, and mathematical-statistical analysis. Key words: winter wheat, sowing quality, field emergence, tillering coefficient, productive tillering.

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Evaluation of entomopathogenic nematode (EPN) isolate, Heterorhabditis indica of Vidarbha region, against the tobacco cutworm, Spodoptera litura

Supriya

Dash

Ingole

et al. 2022

ECJ

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The present study on pathogenicity of entomopathogenic nematodes against Spodoptera litura in laboratory conditions was undertaken during 2020-21, with the aim to ascertain the effectiveness of entomopathogenic nematodes, against an obnoxious cosmopolitan pest S. litura. Experiments were conducted by using entomopathogenic nematode (EPN) isolate Heterorhabditis indica (CICR-Guava), on filter paper, against Galleria mellonella and S. litura at the treatment dose of 10, 20, 30, 40, 60, 80 and 100 IJs/100µl along with control (Sterile distilled water). The results of our study revealed that, EPN isolate H. indica (CICR-Guava) caused 100% mortality at the treatment dose of 40 IJs/100µl within 72 h of infection in 5th instar larvae of G. mellonella and in case of S. litura, 100% mortality was recorded within 72 h of infection at the treatment dose of 100 IJs/100µl in 3rd instar larvae, which was found more susceptible. The median lethal concentration of H. indica (CICR-Guava) for 5th instar larvae was 2.29 IJs/100µl. The result of reproductive potential of isolates of entomopathogenic nematodes revealed that the highest yield was obtained from 5th instar larvae of G. mellonella at treatment dose of 100 IJs/100µl 278667 IJs per larva. In case of S. litura, the highest yield obtained was 152533 IJs. It could be concluded that, there was a positive correlation between nematode treatment concentration, time of exposure and the insect mortality of the tobacco cut worm and multiplication rate of IJs increased with increase of exposure time and size of larvae. This EPN isolate, H. indica (CICR-Guava) can be suggested as biocontrol agents for the control of S. litura in the Vidarbha region.

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Bio-efficacy of Heterorhabditis indica against Groundnut White Grub

Cited by 3 publications

References 0 publications

Principales microorganismos entomopatógenos de Tecia solanivora y sus mecanismos de acción

Principales microorganismos entomopatógenos de Tecia solanivora y sus mecanismos de acción

Formation of winter wheat productivity elements and their relation to sowing quality in the central part of the right-bank forest-steppe of Ukraine

Evaluation of entomopathogenic nematode (EPN) isolate, Heterorhabditis indica of Vidarbha region, against the tobacco cutworm, Spodoptera litura

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