Survey of resistance of stored grain pests to phosphine in Malaysia
1999
A. Rahim Muda | Sulaiman Zulkifly
Strains of major stored product insects collected in 1995 from various grain mills and warehouses throughout Peninsular Malaysia were tested for resistance to phosphine. The objectives of this study were to evaluate changes in resistance spectrum since the last survey (1991), and to verify the relation between storage management, particularly phosphine application techniques, to the development of resistance. Discriminating dose tests showed that the number of premises with one or more species detected resistance has increased to 64% (33.3% in 1991). Resistance was recorded from nine (six in 1991) of the ten states surveyed. Within species, changes in the number of strains showing phosphine resistance in 1995 compared to 1991 (*) were as follows: Rhyzopertha dominica, 75% (100%), Sitophilus spp.O% (7.5%), Tribolium castaneum 44.4% (19%), and Oryzaephilus surinamensis 50% (not monitored in 1991). Poor gastightness of storage structure, and poor gas circulation during fumigation have probably contributed to selection pressure for resistance. With few exceptions, resistance does not appear to be sufficiently high to cause control failures and proper fumigation of commodities infested with these resistant strains should provide complete control.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Universiti Putra Malaysia