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Cotton leaf curl virus disease (CLCuV) is a devastating biotic factor that imposed crop productivity a huge loss. To battle this issue this study was assessed in 2019 for the evaluation of the response of leaf extract of miracle tree (Moringa oleifera L.) and potassium (K) nutrition to mitigate the plague of CLCuV disease in cotton variety CRIS-129. Treatments have consisted of the various K dosses Viz., 0, 100, and 150 kg K2SO4 ha-1, and 3% leaf extract of moringa was sprayed at 30, 60, and 90 days after emergence. Results regarding yield components i-e boll weight (g) and seed index (g) were increased by increasing K application and foliar spray of moringa leaf extract but statistically non-significant (p<0.05). However, seed cotton yield and K contents in cotton leaves were significantly increased with all the treatments. The maximum seed cotton yield (2620 kg ha-1) was achieved with 150 kg K2O ha-1 application and it was increased by about 52% over the control treatment. In the case of incidence % of CLCuV disease, both K nutrition as well as foliar spray played a significant role and CLCuV intensity reduced with increasing rate of K doses and foliar sprays.

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Cotton is well prominent as “white gold” an important cash and precious crop in overall cotton growing development counties. The yield of this crop is depending upon the environment in which it is grown and management practices of the cropping system. It is noted after review of various publications of scientists that several factors are responsible which affecting cotton production, selection of cultivar should be according to environment in which it is grown, soil preparation, seed rate, plant spacing, sowing/planting dates and timely irrigation are the important factors which effect on yield. Whereas, nutrients management and crop protections are the key factors which directly affecting the plant growth and development ultimately directly responsible for decreasing yield. Along with these factors modern technology and farmer’s education play a vital role for producing quality cotton production and management of farms. Therefore, suggested that farmers should apply better management practices and follow proper time management as per practices and apply timely appropriate inputs for crop growth and development and crop protection measures for sustainable cotton production.

Six cotton varieties were evaluated at the environmental condition of Sakrand to assess the CLCV disease incidence % and due to its effect reduction in yield and fiber traits. It was confirmed from the present research that cotton leaf curl virus (CLCV) disease incidence generally has adverse effects on cotton crop growth and development, seed cotton yield, and economic traits. The range of disease incidence % was noted from 19.5% (IUB-13) to 56.8% (CIM-602). Due to CLCV disease incidence up to 50% reduction was noted in plant height, bolls plant-1, boll weight, and seed cotton yield. However, fiber quality traits are less decreased as compared yield traits. Therefore, it is always necessary to recommend cotton leaf curl virus disease resistant/tolerant varieties for general cultivation to combat CLCV and also emphasize on proper control of whitefly, as it is a vector for transmitting CLCV disease from one plant to another. There present study was conducted to document Cotton Leaf Curl Virus (CLCV) disease on yield and economic traits of cotton.