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NICÁCIO,JOSÉ; OLIVEIRA,ISAIAS DE; UCHOA,MANOEL A.; FACCENDA,ODIVAL; ABOT,ALFREDO R.; FERNANDES,MARCOS G.; GARCIA,FLÁVIO R.M.. |
Abstract: This study aimed to know the patterns of spatial distribution of Anastrepha spp. and establish a criterion for determining the appropriate time for pest control. For this, 90 McPhail traps were used as Sampling Units (SU) divided into three commercial orchards of Novo Milênio guava with a total area of 14 ha. Traps were interspersed between the rows of plants, systematically in the orchards, hung and baited with 5% hydrolyzed corn protein with weekly collections. We caught 8,170 Anastrepha spp. in 840 SU. The mean infestation index was compared to the three types of distribution: random, uniform, aggregate, and fit by the theoretical frequency distributions of Poisson, negative binomial and positive binomial. The populations of Anastrepha... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Index of aggregation; Negative binomial; McPhail trap; Fruit pests. |
Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500854 |
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MALDONADO JR,WALTER; BARBOSA,JOSÉ CARLOS; COSTA,MARÍLIA GREGOLIN; GONÇALVES,PAULO CÉSAR TIBURCIO; SANTOS,TIAGO ROBERTO DOS. |
ABSTRACT Among the pests of citrus, one of the most important is the red and black flat mite Brevipalpus phoenicis (Geijskes), which transmits the Citrus leprosis virus C (CiLV-C).When a rational pest control plan is adopted, it is important to determine the correct timing for carrying out the control plan. Making this decision demands constant follow-up of the culture through periodic sampling where knowledge about the spatial distribution of the pest is a fundamental part to improve sampling and control decisions. The objective of this work was to study the spatial distribution pattern and build a sequential sampling plan for the pest. The data used were gathered from two blocks of Valencia sweet orange on a farm in São Paulo State, Brazil, by 40... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Red and black flat mite; Negative binomial; Poisson distribution; Decision making; Integrated pest management. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000400401 |
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Bowker, James Michael; Murphy, D.; Cordell, H. Ken; English, Donald B.K.; Bergstrom, John C.; Starbuck, C. Meghan; Betz, Carter J.; Green, Gary T.. |
This paper explores the influence of demographic and spatial variables on individual participation and consumption of wildland area recreation. Data from the National Survey on Recreation and the Environment are combined with geographical information system-based distance measures to develop nonlinear regression models used to predict both participation and the number of days of participation in wilderness and primitive area recreation. The estimated models corroborate previous findings indicating that race (black), ethnicity (Hispanic), immigrant status, age, and urban dwelling are negatively correlated with wildland visitation, while income, gender (male), and education positively affect wildland recreation participation and use. The presence of a... |
Tipo: Journal Article |
Palavras-chave: Logistic; Negative binomial; Participation; Recreation; Visits; Wilderness; Environmental Economics and Policy; Land Economics/Use; Q21; Q26; Q24. |
Ano: 2006 |
URL: http://purl.umn.edu/43765 |
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