ANDRE RICARDO MACHI
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Artigo IPEN-doc 26924 Ionizing radiation and the influence of package to control of Sitophilus oryzae in rice2017 - MACHI, ANDRE R.; HARDER, MARCIA N.C.; ARTHUR, PAULA B.; FRANCO, SUELY S.H.; ARTHUR, VALTERObjective: This study aimed to use the gamma radiation from Cobalt-60 to control of Sitophilus oryzae in package with previously infested rice and artificial reinfestation. Material and Methods: In the research, 3 types of sample were used: 2 commercial rice packages and 1 in crystal sugar packages. The samples were irradiated with a dose of 1.0kGy to promote disinfestations under a dose rate of 0.560 Gy/h. After 60 days were counted the number of live and dead insects in each package. Results: We concluded that the package containing holes for gases exchange from inside to outside of the package showed easily penetration of insects, while the two packages without holes prevented the reinfestation of insects. Conclusion: The dose of 1.0 kGy was sufficient to do the disinfestations of rice.Artigo IPEN-doc 25596 Control of Alphitobius diaperinus (Panzer, 1797) (Coleoptera: Tenebrionidae) by gamma radiation2018 - ARTHUR, PAULA B.; VILLAVICENCIO, ANNA L.; MACHI, ANDRÉ R.; ROSSI, RODRIGO S.; ARTHUR, VALTERThe aim of the experiment was to determine the sterilizing dose from ionizing radiation by cobalt-60 to Alphitobius diaperinus (Panzer, 1797)(Coleoptera: Tenebrionidae) in peanuts. The study was conducted in the laboratory of Radiobiology and Environment of the Center for Nuclear Energy in Agriculture - CENA / USP at Piracicaba, SP - Brazil. Peanuts samples infested with adults of A. diaperinus with 8 treatments and 5 repetitions were used. Each repetition consisted of 20 adults, a total of 100 individuals per treatment. The samples were irradiated in doses of 0 (control), 25, 50, 75, 100, 125, 150 and 175 Gy, in a source of cobalt-60, Gammacell-220 type, with a rate dose of 381Gy / h. The experiment was conducted in a room with a relative of 25 ± 5 ° C temperatures and humidity of 70 ± 5%. After 50 days of irradiation process was evaluated of the number of emerged insects in each treatment. The results show that the sterilizing doses in F1 and F2 generations respectively were: 150 Gy and 125 Gy. The dose of 150 Gy of gamma radiation can be used in both generations as phytosanitary treatment to control of A. diaperinus infested peanuts.Artigo IPEN-doc 20814 A review on Mononychellus tanajoa (Bondar, 1938) pest of cassava in Brazil2014 - MACHI, ANDRE R.; ESTECA, FERNANDA de C.N.; ARTHUR, PAULA B.; GAVA, MARCIO A.; ARTHUR, VALTER