Eco-Friendly Approaches for the Sucking Pests Management in Cutflowers (Gerbera) Under Protected Cultivation
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Date
2017-08
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University of Agricultural Science, Dharwad
Abstract
A polyhouse study on monitoring, varietal evaluation, coloured sticky traps, bio-pesticides and synthetic chemicals for the management of sucking pests in gerbera was carried out in completely randomised block design during 2016-17 at the Hi-Tech Horticulture Unit, University of Agricultural Sciences, Dharwad.
During monitoring, three species of thrips (Frankliniella schultzei, Scirtothrips dorsalis and Haplothrips gowdeyi), red spider mite (Tetranychus urticae) and natural enemies (spiders and anthocorids) were recorded.
The highest population of thrips and mites were recorded during May (33.05 thrips/flower and 2.95 mites/flower, respectively) and lowest population was recorded during July (19.30 thrips/flower and 1.35 mites/flower, respectively).
Nine varieties were screened for thrips incidence. “Rosalin” variety with pink flower had least thrips (4.43 thrips/flower) whereas “Stanza” with red flower had highest thrips infestation (22.33 thrips/flower).
Among the seven colour traps evaluated for management of thrips, yellow sticky trap was significantly superior in trapping thrips (2.84 thrips/2.5 cm2 /week) followed by blue sticky trap (1.90 thrips/2.5 cm2 /week).
Among the bio-pesticides evaluated for management of thrips, highest per cent protection (89.12 % with net returns of Rs. 2,07,424 and B: C ratio of 2.29) was recorded with three sprays of Lecanicilium lecanii (OF) + Nimbicidine 0.03 per cent, followed by Profenofos 50 EC (86.91 % reduction with net returns of Rs. 1, 92,708 and B: C ratio of 2.20), L. lecanii (OF) (82.73 % with net returns of Rs. 2,01,258 and B: C ratio of 2.25) and Chlorofenpyr 10 SC (78.98 % reduction with net returns of Rs. 1,84,708 and B:C ratio of 2.14).
Three sprays of L. lecanii (OF) + Nimbicidine 0.03 per cent effectively controlled thrips in gerbera under polyhouse.