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首页> 外文期刊>Revista Brasileira de Fruticultura >Efeito de fungicidas cúpricos, aplicados isoladamente ou em combina??o com mancozeb, na express?o de sintomas de fitotoxicidade e controle da ferrugem causada por Puccinia psidii em goiabeira
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Efeito de fungicidas cúpricos, aplicados isoladamente ou em combina??o com mancozeb, na express?o de sintomas de fitotoxicidade e controle da ferrugem causada por Puccinia psidii em goiabeira

机译：铜杀菌剂单独或与曼考昔联合使用对番石榴中Puccinia psidii引起的植物毒性症状和防锈效果的表达

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摘要

Two experiments were carried out in guava orchards cv. 'Paluma' at Monte Alto and Vista Alegre do Alto/SP. In Experiment 1 it was used copper fungicides applied alone and in combination with mancozeb to evaluate the effect of phytotoxicity on floral buds and guava fruits in three developmental stages. In Experiment 2 it was used the same fungicides used in Experiment 1, plus a treatment with tebucunazole in order to evaluate the rust control. In Experiment 1 none of the fungicides tested caused phytotoxicity symptoms and abortion of fruits less than 15 mm in diameter. The fungicides caused higher phytotoxicity in fruits between 25 and 35 mm but not in fruits larger than 40 mm diameter. Copper fungicides combined with mancozeb lead to a slight toxicity, but when applied the mancozeb alone did not lead to phytotoxicity sympton. In The Experiment 2, it was observed that copper fungicides applied alone were efficient to control rust as well as the combination of mancozeb and cuprous oxide or hydroxide and the fungicide tebuconazole.
机译：在番石榴果园中进行了两个实验。 Monte Alto和Vista Alegre do Alto / SP的“ Paluma”。在实验1中，使用了单独使用铜杀真菌剂或与mancozeb结合使用，以评估植物在三个发育阶段对花蕾和番石榴果实的植物毒性作用。在实验2中，使用了与实验1相同的杀真菌剂，并加上戊丁环唑进行处理以评估防锈效果。在实验1中，测试的所有杀菌剂均未引起植物毒性症状和直径小于15毫米的水果流产。杀真菌剂对25至35毫米之间的水果造成较高的植物毒性，但对直径大于40毫米的水果没有造成更高的植物毒性。铜杀真菌剂与代森锰锌合用会产生轻微的毒性，但单独使用代森锰锌并不会导致植物毒性。在实验2中，观察到单独施用铜杀真菌剂以及防霉剂和锰锌和氧化亚铜或氢氧化物以及杀菌剂戊丁康唑的组合都是有效的。

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