A pimenta-do-reino (Piper nigrum L.) é uma planta trepadeira, pertencente à família Piperaceae. Ela é originária do Sudeste Asiático, sendo a mais comum e importante das especiarias. A fusariose, também conhecida por podridão do pé e podridão das raízes é a principal doença da cultura, de ocorrência restrita ao Brasil. Um isolado de Fusarium sp., encontrado infectando plantas de pimenta-do-reino cv. bragantina no município de União dos Palmares em Alagoas, foi caracterizado morfologicamente e teve sua patogenicidade confirmada em mudas deste hospedeiro. Os macroconídios apresentaram-se falcados, hialinos com três a cinco septos, com dimensões de 30,5 - 26,5 x 6,3 - 4,9 ìm, enquanto os microconídios apresentaram-se hialinos, unicelulares, elípticos ou alantóides medindo 16,6 - 4,9 x 6,5 - 3,3 ìm. Os clamidósporos foram abundantes em meio batata-dextrose-ágar. O isolado foi identificado como Fusarium solani f. sp. piperis Alb. tratando-se do primeiro relato deste patógeno em pimenta-do-reino no estado de Alagoas.
Solarização de substrato a base de esterco ovino como alternativa ao substrato comercial na produção de mudas de tomate Solarization of substrate based on sheep as an alternative to commercial substrate in the production of tomato seedlings
Several are phytopathogens that limit the production of cassava (Manihot esculata Crants) being rot of the roots to which they marry the greatest loss in the crop reaching 70%. This culture is of high interest to the Northeast region of Brazil, providing great losses. The difficulties in management have directed the search for alternatives, among which, biocontrollers have shown significant results. This literature review aimed to gather information related to the rot of cassava root cv Rosinha, the main phytopathogens and antagonistic activities of Trichoderma in the control of diseases in the state of Alagoas. A bibliographic survey was carried out in the databases Scielo, Google Acadêmico, Capes portal (theses and dissertations), journals and books. To obtain information on: root rot of table cassava, Trichoderma spp., as a biocontrol agent of phytopathogens.
The aim of this study was identifying the root rot causal agents in cassava, cv Rosinha, in Alagoas state, Brazil. Pathogen species were studied, which are responsible for root rot in cassava, through isolation, morphological characterization and pathogenicity confirmation. Fusarium sp was emphasized among other isolated genera, which is pathogenic to cassava roots and plants. The phylogenetic study was based on the ITS region of the constructed DNA, using the ‘‘maximum Likelihood Tree’’ method, with a base of 1000 “bootstrap” replicas, what showed 100% of genetic similarity to Fusarium falciforme.
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