Banca de DEFESA: ADAMASTOR PEREIRA BARROS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ADAMASTOR PEREIRA BARROS
DATE: 08/09/2020
TIME: 09:00
LOCAL: online
TITLE:

Prospecting for Attractive Plants for Natural Enemies and Their Use in the Management of Fitofagous Insects

KEY WORDS:

conservative biological control, functional diversification, cabbage, beans, natural enemies.

 

 

 

 

PAGES: 168
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Manejo e Tratos Culturais
SUMMARY:

Pest management in food production with no chemical residues and environmental impact is a challenge for agriculture. One of the appropriate tools to manage pests in an environmentally safe way is to maximize natural resources by offering resources to natural enemies. In addition to being a method that requires little energy, conservative biological control changes the agricultural landscape's layout, increasing biodiversity, including natural enemies of pests. The greater supply of resources creates conditions for them to feed and reproduce in the refuge, with greater possibilities for controlling agricultural pests. However, there is a lack of knowledge about which plant species to use and their problems. This thesis's general objective was to evaluate plants' potential for the attractiveness of natural enemies and their use in the biological control of phytophagous insects in organic crops. The experiments were conducted under field conditions at Embrapa Agrobiologia, in Seropédica-RJ, in two phases: 1) study of the plants and the predatory arthropod community associated with them in different forms of crops and planting densities and 2) evaluate the best treatment for floristic diversification and the management of phytophagous insects in cabbage and bean crops. Both stages of this study comprised a survey and identification of the entomofauna associated with plant species. The first stage used four plant species: Cosmos sulphureus (Asteraceae ), Canavalia ensiformis and Crotalaria spectabilis (Fabaceae), and Foeniculum vulgare (Apiaceae ), in single cropping and intercropped in three different densities (mix 1, mix 2 and mix 3), with spontaneous vegetation as a reference. The experiment was carried out from May to November 2017. For the second study, carried out from June to December 2018, the combination of plants with higher potential for attractiveness to predators was chosen. A strip containing the mix was established on the head of the plots with cabbage and beans' crops. The presence of phytophagous and predatory insects was evaluated at three different distances from the range of attractive plants. The two experiments were set in 3 x 4-meter plots, spaced 5 meters apart, using DBC with four blocks. The results are presented in four chapters, addressing: (a) performance of plants with potential for conservative biological control; (b) effect of floristic compositions on the predatory arthropod community; (c) use of floristic resources to attract natural enemies in the organic cultivation of cabbage; (d) Use of floristic resources in the attraction of natural enemies and pest control in the cultivation of beans, under an organic system. Intercropping the four species was viable from an agronomic perspective; it was attractive to predatory arthropods and can be used as a tool for insect management and diversification in agroecosystems such as cabbage and beans, using conservative biological control..

BANKING MEMBERS:
Presidente - 1080064 - ANTONIO CARLOS DE SOUZA ABBOUD
Interna - 2223814 - ELEN DE LIMA AGUIAR MENEZES
Interna - 1213072 - MARGARIDA GORETE FERREIRA DO CARMO
Externo à Instituição - MARCELO PERRONE RICALDE - EMBRAPA
Externo à Instituição - ALEXANDRE JOSÉ FERREIRA DINIZ - USP