Consulta: subjectFacets:"Action thresholds"
Registros recuperados: 2
Data/hora: 10/06/2024 17:16:57

Accuracy and precision of phytonematode sampling plans
Provedor de dados: 111
Autores: Abd-Elgawad, Mahfouz Mohamed Mostafa.
Sampling accuracy and precision are basic to nematode research and rational management decision. Taylor's Power Law is used to determine sample size. The published power law parameters are used here differently to define levels of reliability associated with a fixed, cost-determined, sample size. Such levels may provide the decision-maker with more informative data on sampling methods and their reliabilities. Instead of solving for unknown sample number, the rearranged equation to solve for sampling accuracy permitted the use of exact Student’s t-values. The t-values for confidence limits and standard normal variate were used. Both statistical techniques resulted in identical confidence band, in terms of being below, at, or above the economic threshold...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Action thresholds; Berseem clover; Citrus; Economics; Nematode distribution; Rice.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4371

Impact of integrated pest management on the population of leafminers, fruit borers, and natural enemies in tomato
Provedor de dados: 65
Autores: Miranda,Moacyr Mascarenhas Motta; Picanço,Marcelo Coutinho; Zanuncio,José Cola; Bacci,Leandro; Silva,Ézio Marques da.
The objective of this work was to evaluate the impact of integrated pest management (IPM) in the productivity of the tomato and in the populations of leafminers, fruit borers, and natural enemies in tomato crops. The treatments were calendar (spraying twice weekly with insecticides and fungicides), IPM (spraying when action thresholds were achieved), and control (no pesticide was applied). IPM was the most efficient system of pest control due to presenting similar productivity and 65.6% less pesticide applications than in the calendar. The attack of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) and Liriomyza spp. (Diptera: Agromyzidae) to the leaves only achieved the action threshold in the final phase of the cultivation. The main fruit borer was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentun; Neoleucinoides elegantalis; Predators; Parasitoids; Action thresholds.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782005000100033