Banca de DEFESA: MICHELE GUIMARÃES DONATTI RICALDE

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : MICHELE GUIMARÃES DONATTI RICALDE
DATA : 27/08/2019
HORA: 08:30
LOCAL: PPGF
TÍTULO:

Tithonia spp. as an attractive plant to conservative biological control agents in organic production system.

PALAVRAS-CHAVES:

agricultura orgânica, agricultura familiar, MIP.

PÁGINAS: 160
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
ESPECIALIDADE: Manejo e Tratos Culturais
RESUMO:

The control of insect pests in organic producution is a major problem due to the small amount of inputs available for this purpose. Most conventional insecticides leave residues in food damaging the environment. Diversifying vegetation provides important ecological services such as attraction of natural enemies to production systems. The attraction and maintenance of these insects considered natural enemies is a cheap and effective option for reducing pests in organic systems.Certain plants attract and make resources available to natural enemies by providing food (pollen, prey nectar / alternate hosts), shelter, mating place and oviposition, thus keeping these useful insect breeding grounds close to crop areas. The objective of this work is to evaluate the attractive potential of three plant species to act in the attraction and conservation of natural enemies in areas of organic cultivation of vegetable production. The experiments were carried out in three places: (A) Experimental Station of the Federal University of Rio de Janeiro in Seropédica-RJ, (B) Pesagro Experimental Station in Paty do Alferes-RJ and (C) Embrapa Terrace / Agrobiology Experimental Station. Seropédica-RJ from June 2015 to June 2018.Two species of Asteraceae (Tithonia rotundifolia and Tithonia diversifolia) were studied. They are plant species adapted to the conditions of the Southeast region of Brazil, relatively known by many organic producers and easily multiplied. The first step consisted of evaluating these plants at sites A and B, at sea level and at 500 m altitude respectively, with emphasis on the period and duration of flowering and their potential attractiveness to arthropodofauna. In the second stage, the attractive potential of these plants was evaluated, as well as the existence of control of phytophagous insects, when the attractive plants were cultivated intercropped with tomato (local A), broccoli (local B) and okra (local C). Biweekly samplings were always performed manually and using mechanical equipment, where the collected arthropods were stored and taken to the Embrapa Agrobiology Biological Control Laboratory for later identification. Twenty-seven arthropod families were found in T. diversifolia and 34 in T. rotundifolia; Of these, 14 and 19 families were from natural enemies, respectively. The most frequent families for the two plants studied were Coccinellidae, Dolichopodidae, Carabidae. Among the phytophages, the presence of Cicadellidae was highlighted for both plants. These crops have attractive potential and can be used to diversify agroecosystems. when T. rotundifolia was intercropped with  broccoli and tomato, there was an increase of natural enemies in relation to the control plots.  When okra was intercropped with T. rotundifolia, Scymnus sp. (Coccinelidae) counts were directly related to T. rotundifolia distance.

MEMBROS DA BANCA:
Presidente - 1080064 - ANTONIO CARLOS DE SOUZA ABBOUD
Interno - 1213072 - MARGARIDA GORETE FERREIRA DO CARMO
Externo ao Programa - 2223814 - ELEN DE LIMA AGUIAR MENEZES
Externo à Instituição - LUIS CLÁUDIO PATERNO SILVEIRA - UFLA
Externo à Instituição - CAROLINA RODRIGUES DE ARAÚJO - EMBRAPA