Bragantia (2008) 67, 927-932

Joelma Melissa Malherbe Camargo, Jair Campos Moraes, Edilson Batista de Oliveira and Edson Tadeu Iede (2008)
Resistência induzida ao pulgão-gigante-do-pinus (Hemiptera: Aphididae) em plantas de Pinus taeda adubadas com silício
[Induced resistance effect to the giant conifer aphid (Hemiptera:Aphididae) in silicon fertilized plants of Pinus taeda]
Bragantia 67 (4), 927-932
Abstract: This research aimed to study the effect of silicon as a resistance inducer in P. taeda L. to C. atlantica (Wilson). Preference and reproductive rate tests were performed in plants of P. taeda with and without silicon application. The experiment was carried out in controlled environmental chamber (T: 20ºC; UR: 70%; fotofase: 12h), in a completely random design, and consisted of three treatments and ten replications. The treatments were: T1- substratum standard (without silicon application), T2 - substratum standard + one dose of 0,01g de silicon, T3 - substratum standard + four doses of 0,01g de silicon, with intervals of five days between the applications. Twenty days after the application, a free choice preference test was performed in two different arenas: Petri dishes with pine branches and PVC cages with pine seedlings. Twenty adult aphids were released in each arena. Petri dishes were observed at 40 and 90 minutes, then 4, 12, 18, 24, 36 and 72 hours after release. Pine seedlings in PVC cages were examined in the first, second, third, fourth and seventh days, followed by a weekly record on the next three weeks. Silicon application showed a negative response to preference and reproductive capacity in adults of C. atlantica.
(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): Jair C. Moraes

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Cinara atlantica	Pine (Pinus)	Brazil (south)