Effect of Graded Levels of NPK Fertilizers on  Pests Incidence in Bt Cotton in Alfisol

Jyothi, T. V.; Hebsur, N. S.; Chandravanshi, Parashuram

doi:10.20546/ijcmas.2019.806.070

Cited by 1 publication

(2 citation statements)

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“…In the present investigation, phosphorus levels had showed non significant effect against aphids and whitefly. These findings are in conformity with (Jyothi et al, 2019) found that a significant effect on jassids and shoot weevil population when applied various levels of phosphorus fertilizer, and using NP in combination showed high significant effect on aphids and thrips population. And El-Zahi et al (2012) mentioned that the phosphorus fertilizer was proved effective in reducing the population of B. tabaci , whereas it was increased the density of Impoasca spp significantly.…”

Section: Discussionsupporting

confidence: 92%

“…The occurrence of cotton pests such as sucking insects and bollworms has always been an important factor affecting the total cotton production (Xiao et al, 2019). Year after year, the infestation of sucking pests has increased, and these pests have became one of the dangerous pests of cotton and many other crops in tropical and subtropical regions of the world (Jyothi et al, 2019). It also, caused huge losses in cotton crop.…”

Section: Introductionmentioning

confidence: 99%

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Correlation Between Different Levels of NPK Fertilization and Population Dynamics of Cotton Aphid (Aphis gossypii), Whitefly (Bemisia. tabaci) and Spiny Bollworm (Earias insulana) in Cotton Crop

Awad

2022

Alexandria Science Exchange Journal

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Three levels form each NPK fertilizer plus the recommended level were applied to study the efficiency of different levels on cotton aphid, Aphis gossypii, whitefly , Bemisia tabaci and spiny bollworm, Earias insulana population dynamics , and its reflect on the cotton yield in El-Noubaria district, Behaira Governorate, Egypt. Consequently, the highest mean number of aphid, whitefly and spiny bollworm population in both seasons were obtained from plots applied with 250 kg nitrogen, and it gave the least cotton yield. On the other hand, there was a decrease in the mean numbers of aphid, whitefly and spiny bollworm with decreasing level of nitrogen applied at 100 kg, but it increasing cotton yield.While the increase in potassium fertilizer caused a decrease in the population density of aphid, whitefly and spiny bollworm. For phosphorus fertilization, non significant correlation was observed among different levels of phosphorus fertilizer and the population densities of those tested pests. Finally, it could be assumed that nitrogen was the most fertilizer that had an effect on infestation rates, all levels of it led to a high significant increase in the number of tested pests compared with other fertilization.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%