Horticultura Brasileira (2004) 22, 659-662

Paulo A.S. Gonçalves, Hernandes Werner and João F. Debarba (2004)
Avaliação de biofertilizantes, extratos vegetais e diferentes substâncias alternativas no manejo de tripes em cebola em sistema orgânico
[Evaluation of biofertilizers, plant extracts, and some alternative substances to manage onion thrips in organic agriculture system]
Horticultura Brasileira 22 (3), 659-662
Abstract: Alternative substances to manage thrips population (Thrips tabaci Lind.) on onion, in an organic agriculture system were evaluated. The experiments were carried out in Ituporanga, Santa Catarina State, Brazil. Plants of onion cv. Crioula were transplanted into two fields on 9^th September/96 and 13^th August/97 and harvested respectively on 10^th January/97 and 11^th December/97. A randomized blocks with four replicates were used in both experiments. In 1996 the treatments included the anaerobic liquid biofertilizer at 50%, aerobic liquid biofertilizer at 5%, manganese sulfate at 1%, hydroalcoholic extract of propolis at 0,2%, macerate of herbs at 2% and 4%, tobacco extract (Nicotiana tabacum) 2 L ha^-1 + neutral detergent at 1%, and no spray. In 1997, the treatments were: macerate of herbs 5% and 10%; sulfur waterable powder 0,25% + propolis hydroalcoholic extract 0,2% + extract of fern (Pteridium aquilinum) 3%; anaerobic liquid biofertilizer 50%; extract of wormseed goosefoot (Chenopodium ambrosioides) 10%; aerobic liquid biofertilizer 5%; extract of Ateleia glazioviana 0,5%; extract of fern (Pteridium aquilinum) 10%; extract of chinaberry (Melia zedarach) 10%; extract of camomile (Matricaria chamomilla) 5%; and control without spray. The products were applied using a CO₂ sprayer with constant pressure. The different treatments did not cause significant reduction in the thrips population nor any increase in yield in comparison to control treatment, without spray.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
control - general
environment - cropping system/rotation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Thrips tabaci	Onion/garlic/leek (Allium)	Brazil (south)