Onion thrips

Multiplier onion or Aggregatum onion (Allium cepa var. aggregatum) is one of the important bulbous vegetable cultivated in India. Onion is mainly propagated through bulbs and approximately 1000 kg of bulb is required for planting in one hectare of area. Huge quantities of onion bulbs are wasted for propagation purpose. By switching over from bulb propagation method to seed, there is a saving of seed bulb to a tune of 1000 kg/ha. As Aggregatum onion is being cultivated in 30,000 hectares in Tamil Nadu, a saving of 30,000 tonnes bulbs could be obtained.

7p trinhthamhodang1215 23-09-2020 13 1   Download

A field experiments was conducted at NHRDF, Regional Research Station, Chitegaon, Nashik in three consecutive years during rabi 2013-14, 2014-15 and 2015-16 on onion variety NHRDF Red-2 for the management of onion thrips through basal application and spray of different insecticides. The soil application of the treatments was given before planting and spray was started at 10 DAP after the appearance of thrips and subsequently sprays were given at ten days interval.

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A field trial was conducted at Regional Research station, NHRDF, Nashik in three consecutive years during Rabi 2014-15, 2015-16 and 2016-17 on onion variety Agrifound Light Red for the management of onion thrips by applying different doses of nitrogen as basal application. The result showed that, lowest mean thrips population (22.56 nymphs/plant) were recorded in without N (0 % Nitrogen), however, highest gross yield (306.89q/ha) was recorded in higher application of N (100% of the recommended dose as basal application through calcium nitrate).

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An experiment was conducted for two consecutive years during rabi season of 2014-15 and 2015-16 to manage the onion thrips using three treatment modules viz., M1- IPM module, M2- Farmers’ practice and M3-Untreated control. It has been observed that the IPM module was the best in achieving the maximum leaf growth and bulb yield in both the years (2014-15 and 2015-16) followed by farmers’ practice module.

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The present investigation was conducted to study the seasonal incidence of thrips, Thrips tabaci on onion at various locations in Kashmir valley, during the year 2017-18 and management of thrips during the year 2019.

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The investigations on Seasonal Abundance of thrips, Thrips tabaci Lindemen on Kharif onion and Its Management through Insecticides” were conducted at Horticulture farm, S.K.N. College of Agriculture, Jobner during Kharif, 2016. The incidence of thrips, T. tabaci on onion was commenced in the second week of August and reached to its peak in the second week of September. Whereas, the predator, Coccinella septempunctata Linn. was commenced in the second week of August and reached to maximum in the third week of September.

4p cothumenhmong1 08-12-2019 12 1   Download