– Zeitsch, Reed, C.R., Hagstrum, D.W., Flinn, P.W. �1�^�����՝=� @K��#+++��G��U7�BvC�i��8�g'�N|����N�>{�}rzr���ݝ>=��� �z%;��;}q������l�`������O�@�e()e\!�E�d� P�@�X���:xh��ߟ��A�d��N�zH�������+ǯ�U&e���ll��2+�OO� ��`���%��d[�����@C��5ڻA���9JƮ�b�z��j��h� ��U�����{A��~�Z��a���kh �W��pЯ����Hg�@ۙ �~S� Trials were conducted over 8-week trapping periods and S. granarius were seeded into the bulk at a density of one per kg. We compared two methods of sampling (surface sampling with cup-sampler vs. subsurface, Grain storage and processing facilities consist of a landscape of indoor and outdoor habitats that can potentially support stored-product insect pests, and understanding patterns of species diversity and spatial distribution in the landscape surrounding structures can provide insight into how the outdoor environment can be more effectively monitored and managed. Feeding damage and progeny production of S. granarius was estimated to identify the levels of resistance of the insect on different durum wheat cultivars. x��\K��q˖m�~I��M32�����.I��a`A;L�0\@8;x�B The, ng September to February and rose again in, e trend of outdoor temperatures (Fig. in residues of old grain after unloading the grain-store. The population of : The oviposition and rate of emergence of Sitophilus granarius in two extreme sizes of wheat kernels was studied under 4 levels of population density. grain residues in an empty grain store. %%+ -dPDFSETTINGS=/default -dEmbedAllFonts=true -dAutoRotatePages=/PageByPage -dParseDSCComments=false -sColorConversionStrategy=RGB -dProcessColorModel=/DeviceRGB -dConvertCMYKImagesToRGB=true -dAutoFilterColorImages=true -dAutoFilterGrayImages=true Wheat bait traps were used for pest monitoring; they were changed every month from April to September. This study was conducted to examine the activity of stored-product insect pests outside farm storage facilities during the first2 mo of storage and to relate that activity to colonization of the grain by insects. 0000001316 00000 n 25, and Actellic EC50 are robust or sensitive to the measured extent of over-dosage (2x) or, European-Union countries undergo the process of unifying laws. Although the residue samples had more mites and higher species diversity than the stored grain mass, no correlation in mite abundance and species numbers between samples from grain residues and grain mass was found, thereby indicating low connectivity of these two habitats. Sitophilus granarius (L.) e S. oryzae (L.) (Coleoptera: Curculionidae) sono gli insetti più frequenti e dannosi per i cereali stoccati in sili e magazzini (B ALACHOWSKY, 1963; S ÜSS & L OCATELLI, 2001). <> These findings are important because they enable the strategic selection of wheat cultivars that can be stored for a longer time period, while more sensitive wheat cultivars can be selected for shorter storage time and thus faster delivery to market. H��WێU�|��؏ ڽV���ݖv`�(/�x�H���T�g��}�z�9���u�z������ǟXe��/��._>^}�~[4��o!��}[>,Q�y�v�vy��,��K�v�Y��k����R���,ZsGd@�k��������P z�n����r����ռ+s �����ΎAѩ�:G}�T٩�5�DQ��ʜ�Q|t�Ĩ�Ϯ�d����f��:�ԧ����qI|ӹ�_)*;�Q�\o��꒶0G�̸T\�+�[�=� %PDF-1.4 ��� �r)�ۓ KUČEROVÁ Z., AULICKÝ R., STEJSKAL V. (2005): Outdoor occurrence of stored-product pests ( Coleoptera ) in the vicinity of a grain store. © 2008-2020 ResearchGate GmbH. Durum wheats were artificially infected with 20 individuals of S. granarius. m�K�e� �{��Y6n�W�y2 pYa�U%@�wݿw"c՘�:uU�Z�[�E��D����;�#//N����y�إ }WP'�Y>�>3�����PH��C� �4��:��P�;1�U�P�qŰ��ST�� – Manson Publishing, London, UK: 191 pp. stored for subsequent adult incubation (27°C, 75% r.h.) for l month. WBII probe traps were used in the summer trial only. �� G� ��q��D�J����t�1�(�W��`7 �ۄ���U 7��/���M�O�r��ft�9y���u`K���\�M.�il~vd�s�:�������5�z���^�HVg�Z�>�^�|G 0000064367 00000 n Farms with high numbers of stored-product insects outside of storage facilities had high numbers of insects in 25-bu experimental bins, and farms on which few insects were detected outside also had fewer insects in 25-bu bins. and Sitophilus spp. 6%��fۓ��ز�i=Ʈٯ��["E�D���S$��_)�XV�zK�56]�#�0��U��~�a�� T��rJ�r"�?������B`l&�8�k���d� S��ž�rY9��7 – Journal of Applied, e of insect populations in stored grain. This study documented the accumulation and increase of pests Wheat bait-traps were used for pest monitoring. With increasing number of grains available the aggregation of eggs decreased. in laboratory. Residue samples taken from the elevator boot pit and tunnel areas contained a greater density of pest insects (all species combined) than other locations. 0000002952 00000 n The primary pest Sitophilus granarius was dominant. Every two weeks the sample weight, hectoliter weight, moisture and the number of live weevils, including their number of progenies, were recorded. .�E�\! We found that they tended to underestimate (max. Aspetto : colore scuro uniforme, adulto lungo 3-5 mm, forma allungata, depressa nella parte centrale (vedi foto). 1991: Insects and arachnids of. The population of, ggs) increased 10 - 50 times after one month of, , grain bait traps, outdoor occurrence, hidden infestation, grain residues, pest occurrence in grain residues in the Czech, erová et al., 2003, 2005, Hubert et al., 2006).