Fitopatologia Brasileira (2006) 31, 164-179

Andrea R.A. Moraes, Sérgio A. Moraes, André L. Lourenção, Ignácio J. Godoy and Antônio Lúcio M. Martins (2006)
Efeito da aplicação de thiamethoxam para o controle do tripes na redução da severidade da verrugose do amendoim
[Effect of thiamethoxam application to thrips control on the reduction of peanut scab severity]
Fitopatologia Brasileira 31 (2), 164-179
Abstract: The relation among the application of thiamethoxam for thrips control and the severity of peanut scab was evaluated in field experiments run at Campinas and Pindorama, during 2001/2002, in split-plot design. Main plots consisted of the control and no control of thrips with thiamethoxam and, subplots, of six peanut cultivars: IAC-Tatu-ST, IAC-5, IAC-22 (upright type, short cycle), Runner IAC-886, Tegua and IAC-Caiapo (runner type, long cycle). The evaluations of number of thrips per leaflet and ratingof symptoms, were performed at 56 and 57 days after sowing date in Campinas and Pindorama, when the highest insect populations where registered. In both experiments a partial control of peanut scab was observed, and so, its severity was evaluated at 79 and 91 days of the plantation, in Campinas and Pindorama, respectively, using a rating scale based on symptons shown in stems and petioles. The results showed the efficiency of thiamethoxam in controling thrips in all cultivars. In both localities was observed a reduction in the severity of peanut scab, when thiamethoxam was applied. The severity of scab was higher in the upright cultivars, with the IAC-Caiapo showing the lower scores of severity. The yield was higher for the parcels treated with the insecticide, in both localities, and IAC-Caiapo presented superior yields in relation to the other cultivars. The action of thiamethoxam controling thrips and reducing scab severity should be more explored in integrated control practices.
(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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Database assignments for author(s): André Luiz Lourencao

Research topic(s) for pests/diseases/weeds:
transmission/dispersal of plant diseases
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Enneothrips flavens	Groundnut/peanut (Arachis hypogaea)	Brazil (south)
	Elsinoë arachidis	Groundnut/peanut (Arachis hypogaea)	Brazil (south)