COMPORTAMENTO ALIMENTAR DE Tibraca limbativentris e Glyphepomis spinosa EM PLANTAS DE ARROZ

Abstract

Rice (Oryza sativa L.), belonging to the Poaceae family, is one of the most produced and consumed cereals throughout the world. In addition to playing a fundamental role in human nutrition, it also has significant economic and social relevance. Despite the advantages of rice cultivation, there are considerable challenges, such as noticeable pentatomid attacks. These statements, in particular Tibraca limbativentris, have caused significant damage to plant culms and panicles, leading to considerable production losses. Another species, Glyphepomis spinosa, has been reported as a new challenge in rice plantations, causing damage in both flooded fields and uplands. The Electrical Penetration Graph (EPG) technique has been used to understand the feeding patterns of these insects, offering insights for the development of management strategies and selection of more resistant plants. The objective of the work was to monitor the feeding behavior of T. limbativentris and G. spinosa at different stages of development in rice plants using the EPG technique. The work was carried out under controlled conditions at the Agricultural Entomology Laboratory of the Instituto Federal Goiano – Campus Urutaí. An experiment was carried out comparing the feeding of adult females and males, third and fifth instar nymphs of the species T. limbativentris and G. spinosa. The EPG data were entered into the INFEST software, where spreadsheets were extracted with the four variables: WDI (waveform duration per insect), NWEI (number of waveform events per insect), WDEI (waveform duration wave per bug), WDEI (waveform duration per bug), wave per event per insertion) and PRT (percentage of recording time). These data were subjected to generalized linear model (GLM) analysis and the means were compared using the Tukey test (P≤0.05). It is concluded that the two species, T. limbativentris and G. spinosa, use the same feeding sites at all stages of development. Eating behavior at different stages of development information presented differences. Comparison between species showed that G. spinosa has higher feeding activity compared to T. limbativentris.