Population dynamics of major sucking pests of hybrid cotton (<i>Gossypium hirsutum</i>) in Western Undulating Zone of Odisha

Mandi, N.; Nayak, B. Shivananda; Patnaik, R. K.

doi:10.5958/0974-8172.2018.00109.8

Cited by 1 publication

(3 citation statements)

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“…A two year study reported highest incidence of leafhopper during the third week of October in 2009-10 and during first week of October in 2010-11 [14]. Similar such reports had emerged from other studies also [15,16,17,18,19,20].…”

Section: Leafhopper Populationsupporting

confidence: 72%

“…However, a negative correlation with morning and evening RH [17], rainfall [21]. A non-significantly positive association with all meteorological variables except minimum temperature and rainfall was found [20]. Maximum temperature had a significant favourable effect on the incidence of leafhoppers, while minimum temperature, rainfall, morning and evening RH all indicated a positive but nonsignificant association [18,19,22]…”

Section: Leafhopper Populationmentioning

confidence: 99%

“…It was also affirmed that aphid population exhibited a non-significant negative association with maximum temperature, rainfall and relative humidity, whereas showed a positive link with minimum temperature [25]. In a two year study, the population of aphids exhibited significantly positive relation with maximum temperature, minimum temperature, and evening RH, but a non-significant positive link with morning RH and rainfall in 2013-14, and there was a significant positive relation with minimum temperature and a non-significant positive correlation with all other meteorological factors in 2014-15 [20]. A positive association with sunshine hours for aphid population was also elucidated in previous analysis [13,22,26].…”

Section: Aphid Populationmentioning

confidence: 99%

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Population Dynamics of Sucking Pests in Dual Season Cotton Ecosystem and Its Correlation with Weather Factors

Kiruthika

Murugan

Jeyarani

et al. 2022

IJECC

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Population dynamics of sucking pests in cotton ecosystem were studied at Tamil Nadu Agricultural University, Coimbatore during winter (2021) and summer (2022) seasons. Weekly observations were recorded on 20 randomly selected plants representing top, middle and bottom canopy of the crop which was raised in regular planting dates of winter and summer and were maintained as per the recommended regular agronomic practices except insect management interventions. During winter season, sucking pests viz., leafhopper, aphids, thrips, and whitefly were first observed in field from 39th SMW i.e. one month after sowing. Mealybugs were first observed during 41st SMW i.e. 43 days after sowing (DAS) of crop. The highest population of leafhopper, aphids, thrips, whitefly and mealybug recorded was 4.7, 18.7, 4.6, 2.45 no. per 3 leaves and 13.7 no. per 3 twigs, respectively. The mean population of sucking pests was high in October, 2021 and coincided with square formation to flowering stage except mealybug, which attained peak during January, at the boll bursting stage of crop. During summer season, the sucking pests were found to colonize from 8th SMW, corresponded to 20 DAS crop, while the mealybug occurred at 11th SMW, 40 DAS crop. The peak population of leafhopper, aphids, thrips, whitefly and mealybug registered was 5.4, 38.4, 4.9, 7.07 no./ 3 leaves and 2.4 no./ 3 twigs, respectively. The mean population of sucking pests was high from mid march to first fortnight of april 2022, and by that time the crop was at square formation to flowering stage. On comparison of both the season, summer season crop was infested by intensive level of sucking pests. Correlation results revealed that maximum temperature (0C) showed positive correlation, whereas rainfall (mm) showed negative correlation with population growth of sucking pests. Results of multiple linear regression analysis revealed that all the weather parameters collectively caused 51.1% – 88.4% influence on the population fluctuation of sucking pests.

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Section: Leafhopper Populationsupporting

confidence: 72%