Effect of variety and planting date of rice on population of natural enemies of brown planthopper, Nilaparvata lugens (Stal)

Tetarwal, Arvind Singh; Ram, Lakhi; Singh, Ram; Jat, Mukesh Kumar

doi:10.31018/jans.v6i2.436

“…The biotic agents like, predators and parasitoids are the natural regulators of insect pest population. Climate changes associated with alteration in sowing and planting dates have a profound effect on the insect pest incidences as well as the population of natural enemies [10] Rice is attacked by a number of pests, the stem borer being the major one, which cause losses up to 90 percent if not managed timely. Globally, stem borer alone causes yield losses of 10 million tones and accounts 50% of all insecticides used in the rice field.…”

Section: Introductionmentioning

confidence: 99%

Effect of planting dates on stem borer incidence and its natural enemies in relation to weather variables in rice ecosystem

Baruah¹,

Dutta²

2020

J. Entomol. Zool. Stud.

2

1

0

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The field experiment was conducted in the rice field of Regional Agricultural Research Station, Assam Agricultural University, Titabar, Assam in randomized block design sowing the seeds in three dates at an interval of twenty days between each sowing, viz., early (15 th May), normal (5 th June) and late (25 th June) separately. Early sown was the least damaged crop ( 9.6% dead heart (DH) and 10.3% white ear head (WEH) as compared to normal (15.5 % DH and 16.7% WEH) and late (24.6% DH and 25.3% WEH) with a yield of 5.3t/ha in early, 4.5 t/ha in normal and 2.4t/ha in late sown crops. Spider population was significantly higher in early than that of normal and late planting, whereas the population of coccinellid beetles and the egg parasitoid, Trichogramma japonicum were non-significantly higher in early than that of normal sown crop, but the population of these natural enemies were significantly lower in late sown rice. The stem borer infestation was significantly higher in late sown crop with increased maximum temperature, morning humidity having a significant positive effect in all the dates of planting. There were a non-significant positive effect on population with minimum temperature (r = 0.34 for DH and r = 0.22 for WEH) and average rainfall (r = 0.20 for DH and r = 0.07 for WEH) at early sown. Maximum temperature and morning relative humidity had a significant positive effect on borer infestation as dead heart and white ear head in connection with a significant positive effect of spider population in three dates of planting. The variation in the planting times work as a means of cultural control by creating asynchrony between crop and insect pests' phenology along with crop-weather-pest interaction help in developing forewarning system to warn the farmers in advance to avoid manageable yield loss by stem borer incidences.

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“…However, Rajpoot et al (2019) concluded that the adjustment of rice planting late is the most practical way to inhibit rice stem borer (Scirpophaga incertulas Walker) infestation, as well as release of insect-resistant rice varieties. Tetarwal et al (2014) indicated that stem borers are globally controlled by insecticides, and about 50% of all insecticides applied in rice fields are directed to rice stem borer control. In general, both insecticides and biological control are difficult to adopt against rice stem borers because the insect larvae live mostly inside rice stems, and the adult activity in nocturnal.…”

Section: Discussionmentioning

confidence: 99%

Influence of Sowing Date on Yield and Yield Attributes of Rice Genotypes and Infestation by Rice Leafminer and Rice Stem Borer

Taha

¹

,

Bleih

²

,

Khorchid

³

et al. 2022

Menoufia Journal of Plant Production

0

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2020 and 2021 seasons. The objective of study was to study the effect of three sowing dates (May1 st , May15 th and June1 st ) on yield, yield attributes of 21 rice genotypes, and infestation by rice leaf miner (Hydrellia prosternalis Deem.) and rice stem borer (Chilo agamemnon Bles.). Sowing date significantly affected all studied characters in both seasons. The highest values of flag leaf area, number of panicles per hill, panicle weight, total number of grains per panicle, percentage of filled grain, 1000-grain weight and grain yield were recorded in the earliest sowing date, while the lowest values were obtained with the latest one. Statistical analysis revealed that the rice genotypes were significantly different in all the studied traits. The highest values of grain yield and most of the studied characters were observed in Giza 179 and GZ10804-3-1-2-2-2, followed by Giza 178 and Sakha 108 rice cultivars. Rice leaf miner infestation significantly increased as the sowing was later. Giza 178 and Giza 179 rice cultivars suffered the highest infestation, followed by GZ 9399-4-1-1-2-1-2 and GZ 10778-17-1-6-1 promising lines. The rice stem borer infestation significantly decreased by delaying the sowing date. GRYT-26-17-178, GRYT-29-17-178 lines and Korea 27 rice genotypes recorded the highest infestation with both dead hearts and white heads.

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“…However, Rajpoot et al (2019) concluded that the adjustment of rice planting late is the most practical way to inhibit rice stem borer (Scirpophaga incertulas Walker) infestation, as well as release of insect-resistant rice varieties. Tetarwal et al (2014) indicated that stem borers are globally controlled by insecticides, and about 50% of all insecticides applied in rice fields are directed to rice stem borer control. In general, both insecticides and biological control are difficult to adopt against rice stem borers because the insect larvae live mostly inside rice stems, and the adult activity in nocturnal.…”

Section: Discussionmentioning

confidence: 99%

Influence of sowing date on yield and yield attributes of rice genotypes and infestation by rice leafminer and rice stem borer

Taha

¹

,

Bleih²,

Khorchid³

et al. 2022

Menoufia Journal of Plant Production

1

0

View full text Add to dashboard Cite

2020 and 2021 seasons. The objective of study was to study the effect of three sowing dates (May1 st , May15 th and June1 st ) on yield, yield attributes of 21 rice genotypes, and infestation by rice leaf miner (Hydrellia prosternalis Deem.) and rice stem borer (Chilo agamemnon Bles.). Sowing date significantly affected all studied characters in both seasons. The highest values of flag leaf area, number of panicles per hill, panicle weight, total number of grains per panicle, percentage of filled grain, 1000-grain weight and grain yield were recorded in the earliest sowing date, while the lowest values were obtained with the latest one. Statistical analysis revealed that the rice genotypes were significantly different in all the studied traits. The highest values of grain yield and most of the studied characters were observed in Giza 179 and GZ10804-3-1-2-2-2, followed by Giza 178 and Sakha 108 rice cultivars. Rice leaf miner infestation significantly increased as the sowing was later. Giza 178 and Giza 179 rice cultivars suffered the highest infestation, followed by GZ 9399-4-1-1-2-1-2 and GZ 10778-17-1-6-1 promising lines. The rice stem borer infestation significantly decreased by delaying the sowing date. GRYT-26-17-178, GRYT-29-17-178 lines and Korea 27 rice genotypes recorded the highest infestation with both dead hearts and white heads.

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Effect of variety and planting date of rice on population of natural enemies of brown planthopper, Nilaparvata lugens (Stal)

Cited by 4 publications

References 1 publication

Effect of planting dates on stem borer incidence and its natural enemies in relation to weather variables in rice ecosystem

Effect of planting dates on stem borer incidence and its natural enemies in relation to weather variables in rice ecosystem

Influence of Sowing Date on Yield and Yield Attributes of Rice Genotypes and Infestation by Rice Leafminer and Rice Stem Borer

Influence of sowing date on yield and yield attributes of rice genotypes and infestation by rice leafminer and rice stem borer

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