Studied on Species Diversity of Rice Leaf Folder and their Natural Enemies in North Eastern Coastal Plains of Odisha

Rautaray, B.K.; Bhattacharya, Souvik; Vishnu, D.; Dash, Samir Ranjan

doi:10.20546/ijcmas.2019.810.072

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…The highest yield was observed at 1st DOS i.e. 5156 kg ha -1 followed by in 2 nd DOS [12].who reported that early transplanted rice has minimum infestation with higher yield while late transplanted rice has maximum infestation with lower grain yield.…”

Section: Yield (Kg Ha -1 )mentioning

confidence: 93%

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Study on Impact of Sowing Dates on Rice Leaf Folder Cnaphalocrocis medinalis (Guenee) in Direct Seeded Rice

N.,

C.,

C.V.

et al. 2023

IJECC

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A field experiment to study the impact of sowing dates on Rice leaf folder in direct seeded rice was conducted at Agricultural College Farm, Bapatla during kharif, 2021. Early planted rice crop had lower pest than later transplanted rice. Various dates have a significant impact on the occurrence of biotic stress, particularly insect pests. To identify suitable plating dates to minimize the leaf folder infestation in paddy the following experiment was conducted. Sowing was done at four different dates with 10 days interval which were taken as treatments each replicated with five times and the data has also been correlated with light trap data. The mean per cent damage ranged from 9.44 to 16.64 %. Highest infestation (16.64 %) was observed in last date of sowing and least damage (9.44 %) was observed in first date of sowing. Correlation analysis of light trap catch data shown a positive correlation with morning (r = 0.373) and evening (r = 0.186) relative humidity while a negative correlation with maximum (r = - 0.182), and minimum (r = - 0.017) temperatures and rainfall (r= - 0.154). Multiple Linear Regression (MLR) of trapped adult number and climatic conditions at different sowing dates revealed that weather parameters contributed to the variation in moth number trapped in light trap by 35.4 per cent in first date of sowing, 42.2 per cent in second date of sowing, 59.6 per cent in third date of sowing, and 50.7 per cent in fourth date of sowing. Yield ranged from 3632 kg ha-1 in last date of sowing to 5156 kg ha-1 in first date of sowing.

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Section: Yield (Kg Ha -1 )mentioning

confidence: 93%

“…also reported that leaf folder activity was observed maximum in late planted rice followed by normal and early planted rice. Rautaray et al [12]. Prasad R. [13] and Kumari, A and Prasad, R.…”

Section: Cumulative Mean Per Cent Damage By Leaf Foldermentioning

confidence: 99%

Study on Impact of Sowing Dates on Rice Leaf Folder Cnaphalocrocis medinalis (Guenee) in Direct Seeded Rice

N.,

C.,

C.V.

et al. 2023

IJECC

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Contemporary Management of Insect Pests in Rice

Shah

Razaq

Islam

2022

Modern Techniques of Rice Crop Production

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Adult oviposition preference and larval performance of Cnaphalocrocis medinalis Guenee (Pyralidae: Lepidoptera) on transgenic Bt rice

Rajadurai

Sudhakar

Varanavasiappan

et al. 2023

Int J Trop Insect Sci

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BackgroundIn general, it was observed that the transgene expression in transgenic plants did not alter the biochemical composition and phenotypes of transformed plants. The oviposition preference of gravid female moths is expected to correlate with the host plant tness for their offspring development. Since many neonate larvae of lepidopteran species are relatively immobile, female adults must choose a more favorable site for laying eggs to increase the probability of larval survival. With this background, the present investigation was carried out to study the behavior of larvae and adults of leaf folder, Cnaphalocrosis medinalis (Guenee) on transgenic rice lines expressing cry2AX1 gene which were previously generated in our laboratory. ResultsPCR positive transgenic plants were subjected to quantitative ELISA for their level of expression. The expression level of Cry2AX1 ranged between 18±0.01 to 128±0.06 ng/gram of fresh leaf tissues, while the non-transformed ASD16 did not show any detectable level of expression. Among the transgenic events tested, the maximum expression level (128 ng/g) of Cry protein was observed in GR-ASD16-1-91-1. The results revealed that the adults did not exhibit oviposition preference towards transgenic and non-transgenic plants in choice as well as no choice test as the adults could not differentiate the test and control plants for laying the eggs. However, signi cant differences in larval survival and adult emergence indicated the deleterious effect of transgenic plants harboring the cry2AX1 gene in both larval and adult development, irrespective of the test condition of choice and no choice. Prolonged settling time and reduced folding length and binds spun by the larvae on transgenic plants lead to the hypothesis that the larvae could not behave normally and make congenial niche as in non-transgenic plants, exposing the larvae to the risk of both biotic and abiotic factors. The larvae fed on transgenic plants could not behave normally as in wild type and exposing their body parts to the risk of both biotic and abiotic factors. ConclusionsIt was concluded that transgenic plants with a moderate level of insect toxicity can also be used in IPM of rice leaf folder by introducing larval parasitoids or predators for effective management of rice leaf folder.

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Studied on Species Diversity of Rice Leaf Folder and their Natural Enemies in North Eastern Coastal Plains of Odisha

Cited by 5 publications

References 1 publication

Study on Impact of Sowing Dates on Rice Leaf Folder Cnaphalocrocis medinalis (Guenee) in Direct Seeded Rice

Study on Impact of Sowing Dates on Rice Leaf Folder Cnaphalocrocis medinalis (Guenee) in Direct Seeded Rice

Contemporary Management of Insect Pests in Rice

Adult oviposition preference and larval performance of Cnaphalocrocis medinalis Guenee (Pyralidae: Lepidoptera) on transgenic Bt rice

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