Seasonal dynamics of insect pests of potato under sub-tropical conditions of Punjab

Sharma, Smriti; Kaur, Amandeep; Kooner, Rubaljot

doi:10.5958/0974-4576.2019.00084.7

Cited by 2 publications

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“…The result was supported with findings ofRameshbabu et al (2015) andSelvaraj et al (2010) who reported 35 per cent and 39 per cent variations in S. litura male moth catches in soybean and per cent damage in cotton due to the effect of weather factors, respecively. The results of present study also in coherence with the findings ofSharma et al (2017) who reported that the variables viz., temperature, relative humidity and rainfall contributed significantly in explaining the variation of S. litura population in sugar beet, soybean and chilli, respectively.…”

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confidence: 93%

Effect of weather parameters on the seasonal dynamics of tobacco caterpillar, Spodoptera litura (Lepidoptera: Noctuidae) in castor in Telangana State

Duraimurugan

2021

J. Agrometeorol.

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Field experiments were carried out for four years (2012-13 to 2015-16) to study the seasonal dynamics of tobacco caterpillar, Spodoptera litura in castor and its relationship with different weather parameters during kharif season in Telangana State. Moth catches of S. litura were observed throughout the crop season, wherein maximum catches (44.8 to 124 moths/trap/week) were observed during mid- August to late-October [33rd to 43rd Standard Meteorological Week (SMW)]. Peak oviposition (2.0 to 14.8egg-masses/5 plants) and larval incidence (14.4 to 48 larvae/5 plants) of S. liturawas recorded during mid-August to mid-November (33rd to 46th SMW) coinciding with the vegetative to primary spike development stage of the crop. The correlation analysis indicated that the moth catches and larval population of S. litura showed significant positive correlation with weather parameters viz., maximum temperature, minimum temperature, rainfall and rainy days, while egg-masses of S. litura showed significant negative correlation with morning relative humidity and minimum temperature.The stepwise regression analysis revealed that minimum temperature, rainy days, wind speed and evening relative humidity could explain 64 per cent variation in S. litura moth catches. Among all the variables morning relative humidity was found to contribute significantly and showed 59 per cent effect on the population fluctuation of eggmasses, while rainy days and maximum temperature could explain 51 per cent variation in larval population of S. litura in castor.The models were validated with independent data 2015-16. The overall results suggested that the models can be used for predicting the population of S. litura in castor for optimizing management strategies.

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confidence: 93%

Effect of weather parameters on the seasonal dynamics of tobacco caterpillar, Spodoptera litura (Lepidoptera: Noctuidae) in castor in Telangana State

Duraimurugan

2021

J. Agrometeorol.

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“…Thus, it was observed that aphid, jassid and whitefly populations were highly influenced by T max , T min and RH, however, the SH had the least influence on population of these insects. Sharma et al (2019) also reported negative correlation of aphid population in potato with T max and T min but positive correlation with RH. Saxena et al (2012) reported that population buildup of Lipaphis erysimi in mustard was negatively correlated with T max and T min .…”

Section: Insect-pests Incidence In Relation To Weather Parametersmentioning

confidence: 86%

“…It might be due to the positive correlation of these insects with T max and T min , and SH, and the negative correlation with RH. Sharma et al (2019) also reported that the aphid population gradually increased w h i l e t h e m e a n population of whitefly and jassid decreased from November to December. Shah et al (2019) also reported the decreased whitefly population with decreased daily T min below 12°C.…”

Section: Insect-pests Incidence In Relation To Weather Parametersmentioning

confidence: 87%

Nutrition and weather effects on population dynamics of insect-pests in potato (Solanum tuberosum)

et al. 2021

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Insect population studies were conducted to estimate the relative population abundance of sucking insect-pests on potato (Solanum tuberosum L.) in relation to nutrition management and weather parameters at Punjab Agricultural University, Ludhiana, India during rabi 2014-15 and 2015-16. The lowest and the highest aphid, jassid and whitefly populations were recorded with recommended dose of manures and fertilizers (T1-RDMF), and the unfertilized control (T10), respectively during 46th to 51st Standard Meteorological Week (SMW). Seasonal fluctuation of insectpest- infestation revealed that the weather parameters influenced the insects population. The aphid population was the lowest (0.27/plant) during 46th SMW and it increased with advancement in the crop growth stage with its highest population (3.43/plant) during 52nd SMW. Contrary to the aphid population, the highest populations of jassid (2.89/ plant) and whitefly (2.23/plant), irrespective of the nutrition treatments, were recorded during 47th SMW, and decreased with advancement of the crop-growth stage with the lowest population (0.49 jassid and 0.55 whitefly/plant) being during 52nd SMW. A negative correlation was observed between the aphid population, and the maximum-(Tmax) and minimum-temperatures (Tmin) and sunshine hours (SH) but the positive correlation with relative humidity (RH). However, the trends for the jassid and whitefly populations were the opposite.

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Seasonal dynamics of insect pests of potato under sub-tropical conditions of Punjab

Cited by 2 publications

References 0 publications

Effect of weather parameters on the seasonal dynamics of tobacco caterpillar, Spodoptera litura (Lepidoptera: Noctuidae) in castor in Telangana State

Effect of weather parameters on the seasonal dynamics of tobacco caterpillar, Spodoptera litura (Lepidoptera: Noctuidae) in castor in Telangana State

Nutrition and weather effects on population dynamics of insect-pests in potato (Solanum tuberosum)

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