Cotton whitefly
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Major threat to highly productive cotton belt of North India is Cotton Leaf Curl Disease exclusively transmitted by whitefly (Bemisia tabaci). The present investigation was carried out at Research farm of department of Agricultural Meteorology, CCS HAU, Hisar Haryana, to evaluate progression of CLCuD and whitefly (Bemisia tabaci) in relation to weather parameters. Three Bt -cotton hybrids were sown at three different dates. Per cent CLCuD incidence increases continuously from appearance to picking.
13p trinhthamhodang1215 23-09-2020 14 1 Download
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Eco-friendly IPM module for the management of major sucking pests of cotton was demonstrated in the farmer‟s field. Eco-friendly IPM module has significantly reduced the sucking pests population. The leafhoppers population was low (1.5 number / 3 leaves) in the demo plots and it was high (4.2 numbers/ 3 leaves) in the check plots. Similarly the aphids, thrips, whitefly and mealy bug population were low in the demo plots when compared to the check plots.
6p caygaocaolon7 18-09-2020 9 0 Download
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This is because the incidence and spread of a single virus disease may be dependent on several vectors which have complicated ecologies themselves (Bos, 1986). Whitefly (Bamasia tabaci) transmitted cotton leaf curl virus disease was the major problem in cotton cultivation (Sharma et al., 2006). However, weather has a very crucial role in CLCuD spread and development and also affects its vector whitefly’s ecology.
8p cothumenhmong7 09-09-2020 13 1 Download
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The study on “Incidence of sucking pests and natural enemies in cotton under high density planting system (HDPS)” was conducted at RARS, Lam, Guntur during kharif, 2016-17 to observe the incidence of sucking pests such as leafhoppers, aphids, thrips and whitefly and also the incidence of natural enemies (Spiders and Coccinellids). Among the sucking pests thrips population was found dominating other sucking pests during initial days of crop growth period i.e., up to 90 DAS there after aphid population was dominated i.e., from 90- 135 DAS both in normal and HDPS.
8p kequaidan4 05-05-2020 11 1 Download
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To manage the population of cotton whitefly (Bemisia tabaci), an experiment was laid out in randomised block design (RBD) with nine treatments including untreated control and each treatment was replicated thrice.
8p nguathienthan4 18-04-2020 10 2 Download
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Incidence and management of cotton whitefly Bemisia tabaci under high density planting system (HDPS)
The study on “Incidence and Management of Cotton whitefly, Bemisia tabaci Under High Density Planting System (HDPS)” was conducted at RARS, Lam, Guntur during kharif, 2016-17 to observe the incidence of whitefly under HDPS and to determine the efficacy of flonicamid 50% WG, diafenthiuron 50% WP, acephate 75% SP, monocrotophos 36% SL, fipronil 5% SC, buprofezin 25% SC and imidacloprid 17.8% SL under HDPS. There is no significant difference was observed in the incidence of whiteflies in both normal and HDPS. Among the tested insecticides diafenthiuron 50% WP @ 1.25g.
6p trinhthamhodang1212 06-04-2020 13 1 Download
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Cotton is an important fiber cash crop of India and cotton leaf curl disease is the major biotic constraint that can significantly reduce the production and productivity of the crop. Gossypium hirsutum L. suffered losses in Northern part of India mainly in Haryana due to high incidence of cotton leaf curl disease (CLCuD) and “whitefly” which is the vector of this disease. Development of resistant variety to this disease is most effective, long term and safe method to tackle with this problem.
13p quenchua4 06-04-2020 7 1 Download
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Mesta (Hibiscus sabdariffa) is an important commercial fibre crop after cotton and jute, which belong to the family Malvaceae. The crop is mainly grown for a green leafy vegetable purpose in North Karnataka, India. Mesta crop is being affected by many diseases of which leaf curl disease caused by Begomovirus is a main constraint in its production. The disease is observed to be transmitted by different means mainly by whitefly (B. tabaci), dodder (Cuscuta sp.), grafting and sap.
10p trinhthamhodang4 22-03-2020 11 1 Download
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The field experiment was carried out at Agricultural and Horticultural Research Station, Honnavile farm Shivamogga during Kharif 2016-17. Totally 15 Bt cotton hybrids and their counter non Bt cotton hybrids were screened against sucking pests of cotton like aphids and whiteflies under unprotected conditions.
4p caygaocaolon2 14-03-2020 8 0 Download
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The two year experiments were conducted under field and in the laboratory with fifteen cotton cultivars as treatments replicated thrice. Observation on major sucking pest viz., aphid, leafhopper, whitefly and thrips were recorded on five plants and biochemical constituent viz., crude protein, total phenols and total soluble sugar were estimated from the leaves of cotton cultivars collected at 45 and 60 days after emergence. The biochemical were estimated by standard methods and correlated with sucking pests.
12p nguaconbaynhay3 07-02-2020 10 1 Download
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The experiment was carried out during kharif 2014 at College of Agriculture, Indore under All India Coordinated Cotton Improvement Project in Randomized Block Design (RBD) with eight treatments and three replications on Bt cotton hybrid NCS 927, sown on 27th July with 0.6x0.6 m spacing. The recommended agronomical practices were adopted properly. Each treatment was prepared for alternate use of two insecticides during six sprays. The spraying was done at 10 days interval with 500 litre water per hectare, sprayed by knapsack sprayer fitted with a duromist nozzle.
8p cothumenhmong1 10-12-2019 9 1 Download
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The present in vitro studies on bio-efficacy of granular, oil based and wettable powder formulations on various sucking pests were carried out at Entomology laboratory, Institute of Organic Farming (IOF), University of Agricultural Sciences, Dharwad. Among different formulations evaluated viz., rice bran oil (60 %) + corn oil (40%) formulation found least LC50 value against corn aphids (0.182 x106 cfu / ml), grape vine mealy bug (0.560 x 106 cfu / ml), cotton thrips (0.591 x 106 cfu / ml), and guava whitefly (0.942 x 106 cfu / ml). The olive oil formulation recorded least LC50 value 0.
10p cothumenhmong1 08-12-2019 9 0 Download
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Cotton Leaf Curl Disease (CLCuD) is a devastating disease in cotton and cause seed cotton yield loss upto 80% in Northern India. Transmission of CLCuD by Bemisia tabaci, the role of alternative weed hosts, infested cotton plants is well understood. However, the relationship of viruliferous whitefly population and CLCuD incidence is still not clear. We aimed to pursue a detailed study on the effect of general whitefly population and viruliferous whitefly population on CLCuD percent disease index (PDI) and their correlation.
16p chauchaungayxua1 04-12-2019 17 1 Download