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Mapping of spatiotemporal distribution of Tibraca limbativentris Stal (Hem.: Pe...
Costa,Helen da Silva; Seidel,Enio Júnior; Pazini,Juliano de Bastos; Silva,Augusto Maciel da; Silva,Fernando Felisberto daABSTRACT The rice stem bug, Tibraca limbativentris Stal (Hem.: Pentatomidae), is one of the main insect pests in Brazilian rice crops. Knowledge of its spatiotemporal distribution can support the development of an effective sampling system and improve IPM strategies. This study aimed to map the spatiotemporal distribution of rice stem bug in flooded rice crop in Southern Brazil. Flooded rice crop was scouted fo...
Development of Oryzophagus oryzae (Costa Lima) in rice cultivars
Lima,Crislaine Barcellos de; Grützmacher,Anderson Dionei; Pazini,Juliano de Bastos; Silva,Fernando Felisberto da; Rosa,Ana Paula Schneid Afonso daABSTRACT Insect-resistant cultivars are essential for improving the management of pests such as Oryzophagus oryzae (Coleoptera: Curculionidae), which significantly decreases flooded rice yields. However, the degree of benefit brought to the crop varies with the type of resistance. This study aimed to evaluate the resistance of rice cultivars to O. oryzae, inferring about antixenosis and antibiosis effects on th...
Some aspects about the spatial dependence index for variability of soil attributes
Santos,Eduardo Lucas Ensslin dos; Seidel,Enio Júnior; Pazini,Juliano de Bastos; Oliveira,Marcelo Silva de; Appel Neto,Edemar; Barbosa,Ismael CanabarroABSTRACT: The main purpose of this article was to evaluate the behavior and relationship of the range and components of SDI (Spatial Dependence Index) in general and in function of field factors such as soil types, type of attribute and soil layers. This evaluation was based on real data collected in national journals. It was noticed that the parameter range, in general and for different field factors, presente...
Selectivity of pesticides registered for soybean crop on Telenomus podisi and T...
Zantedeschi,Ronaldo; Grützmacher,Anderson Dionei; Pazini,Juliano de Bastos; Bueno,Flávio Amaral; Machado,Larissa LongarayABSTRACT The use of pesticides in the soybean crop may impair the biological control, if the products are not selective to Telenomus podisi and Trissolcus basalis, which are important stink bug egg parasitoids. This study aimed to assess the selectivity of 15 pesticides registered for soybean crop on adults of T. podisi and T. basalis. Three laboratory bioassays were performed, totaling 18 treatments, in a comp...
Relationship between the occurrence of the rice water weevil and water depth in...
Büttow,Germano Tessmer; Pazini,Juliano de Bastos; Seidel,Enio Júnior; Silva,Fernando Felisberto da; Grützmacher,Anderson DioneiAbstract: The objective of this work was to assess the relationship between the depth of irrigation water and larval infestation by Oryzophagus oryzae in flooded rice crop. Water depth and larval infestation were evaluated in the upper levee, in between levees, and in the lower levee. The data were subjected to the descriptive statistical and geostatistical analyses. The highest larval infestation occurs in fie...
Selectivity of pesticides used in rice crop on Telenomus podisi and Trichogramm...
Pazini,Juliano de Bastos; Grützmacher,Anderson Dionei; Martins,José Francisco da Silva; Pasini,Rafael Antônio; Rakes,MatheusABSTRACT Telenomus and Trichogramma species stand out as agents for the biological control in rice crops, and the main strategy for preserving them is the use of selective pesticides. This study aimed at evaluating the toxicity of pesticides used in irrigated rice crop on Telenomus podisi Ashmead (Hymenoptera: Platygastridae) and Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae). Adults of these par...
Método de amostragem do pulgão-da-raiz na cultura do arroz irrigado
Silva,Fernando Felisberto da; Martins,José Francisco da Silva; Pazini,Juliano de Bastos; Botta,Robson Antonio; Rosa,Ana Paula Schneid Afonso daCom objetivo de definir um método eficiente para amostragem do pulgão-da-raiz do arroz (Rhopalosiphum rufiabdominale), foi realizado um experimento num arrozal irrigado por inundação, da cultivar 'Avaxi', localizado em Santa Vitória do Palmar, RS. Retiraram-se amostras padrão de solo e raízes à profundidade de 5cm, utilizando um amostrador constituído por um tubo de PVC rígido (15cm de altura x 5cm de diâmetro)...
Geostatistics applied to the study of the spatial distribution of Tibraca limba...
Pazini,Juliano de Bastos; Botta,Robson Antonio; Seidel,Enio Júnior; Silva,Fernando Felisberto da; Martins,José Francisco da SilvaTibraca limbativentris (rice stem bug) is an insect highly injurious to the rice crop in Brazil. The aim of this research was to define the spatial distribution of the T. limbativentris and improve the sampling process by means of geostatistical application techniques and construction of prediction maps in a flooded rice field located in the "Planalto da Campanha" Region, Rio Grande do Sul (RS), Brazil. The exp...
Micobiota parasitária de escleródios de Sclerotinia sclerotiorum isolada de sol...
Ethur,Luciana Zago; Copatti,Andrio Spiller; Fipke,Glauber Monçon; Calvano,Caroline Carvalho Aguirre; Pazini,Juliano de BastosO objetivo do presente trabalho foi identificar a diversidade da micobiota parasitária e o tempo decorrido até o início do parasitismo de escleródios de Sclerotinia sclerotiorum em solos da fronteira oeste do Rio Grande do Sul (RS). Foram coletados solos agrícolas e não agrícolas de cinco localidades na fronteira oeste do Rio Grande do Sul. O isolamento dos fungos foi realizado por meio do teste de iscas, sendo...
Abundância sazonal de percevejo-do-colmo do arroz
Botta,Robson Antonio; Silva,Fernando Felisberto da; Pazini,Juliano de Bastos; Martins,José Francisco da Silva; Rubenich,RodrigoA população de percevejo-do-colmo (Tibraca limbativentris) vem elevando-se, nos últimos anos, posicionando-o como uma das principais pragas da cultura do arroz irrigado, na região do Planalto da Campanha do Rio Grande do Sul. Fatores favoráveis ao longo do ano propiciam condições para sua infestação nas lavouras e posterior hibernação. O presente estudo objetivou verificar a variação populacional do percevejo d...