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Hagstrum, David W.; Reed, Carl; Kenkel, Phil

doi:10.1023/a:1009682410810

Cited by 68 publications

(7 citation statements)

References 53 publications

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“…Each of our 16 bins had 100 adults of the three beetle species added weekly, for a total of 400 adults added by week 4, but probe trap number in the aerated-only bins averaged over 1000 beetles, suggesting than several thousand adult T. castaneum were in each bin at week 4. These high numbers were unlikely to have resulted from reproduction in that 4-week period; the warm grain temperatures of 30–32 °C in those non-methoprene bins during that time likely did not contribute to generating 1000’s of new adults based on development rates of those species [13]. Bins were clean and free of grain before loading, so residual T. castaneum are not implicated in contributing to these high numbers.…”

Section: Discussionmentioning

confidence: 99%

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Combination of Methoprene and Controlled Aeration to Manage Insects in Stored Wheat

Liu

Arthur

VanGundy³

et al. 2016

Insects

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A commercial formulation of the insect growth regulator methoprene was applied to wheat stored in small bins either alone or in combination with controlled aeration of the bins, to lower grain temperature for insect pest management of stored wheat. Grain temperatures were monitored and modified by a computer-controlled thermocouple system that also activated the aeration system at programmed set-points to move cool ambient air through the grain mass to lower grain temperature. Results from sampling insect populations in experimental storage bins along with laboratory mortality bioassays of insects placed on wheat taken from the bins over the course of the storage period showed that methoprene was very effective in controlling infestation by the externally-feeding stored grain insects Plodia interpunctella (Hübner), the Indian meal moth Tribolium castaneum (Herbst), the red flour beetle, Cryptolestes ferrugineus (Stephens), the rusty grain beetle, and also for the internal-feeding pest Rhyzopertha dominica( Fauvel), the lesser grain borer. Methoprene did not give good control of the internal-feeding pest Sitophilus oryzae (L.), the rice weevil. Aeration alone was somewhat effective in suppressing insect population development, while methoprene alone or when combined with aeration greatly enhanced insect control. Commercial grain grading for industry quality standards at the end of the storage period confirmed the impact of insect suppression on maintaining high quality of the stored wheat. This field experiment shows that methoprene combined with aeration to cool grain can be effective for pest management of stored wheat in the southern plains of the United States of America.

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Section: Discussionmentioning

confidence: 99%

“…Aeration with ambient air is an important component of integrated pest management strategies to help manage insect infestation in stored grain by cooling the grain [12,13,14,15,16]. Aeration slows down the normal development of immature insects by lowering the ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

Combination of Methoprene and Controlled Aeration to Manage Insects in Stored Wheat

Liu

Arthur

VanGundy³

et al. 2016

Insects

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“…In developed countries and in particular the U.S., most cereals are stored in commercial grain elevators. Monitoring of grain temperature and calendar-based fumigations using phosphine are among the control measures taken for insects in grain elevators (Hagstrum et al, 1999). Bins can be built from steel or concrete.…”

Section: Maize Storagementioning

confidence: 99%

Pesticide free methods of maize weevil control in stored maize for developing countries

Bbosa

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“…Components of insect pest management programs can include sanitation and cleaning prior to storage, aeration to modify the internal environment of the storage structure, and fumigation with phosphine to eliminate infestations that occur during storage [4]. Another viable component of management plans for stored grain management is the use of grain protectants, which are insecticides that are applied as grains and are loaded into storage [5].…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Combinations of Methoprene and Deltamethrin as Long-Term Commodity Protectants

Arthur

2019

Insects

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Wheat, corn, and brown rice were treated with different combinations of a deltamethrin suspension concentrate (SC) formulation and a new emulsifiable concentrate (EC) formulation, at rates of either 0.5 or 1.0 ppm alone or in combination with 1.25 and 2.5 ppm methoprene (10 treatments in all, including an untreated control). Treated commodities were stored at ambient conditions on the floor of an empty grain bin in Manhattan, KS, USA, in 5-kg lots for individual replicates. The commodities were sampled and bio-assayed every three months for 15 months by exposing 10 mixed-sex parental adults of selected adult stored product insects on 70–80 g of the commodity. For all treatments, there was no regression of declining efficacy with respect to the month. Therefore, the data were combined for analysis. On wheat and brown rice, there was no reproduction of Rhyzopertha dominica (Fabricius) in any of the treatments, and there was no weight loss in either commodity that was caused by feeding of the parental adults or developing progeny. There was reproduction of Sitophilus oryzae (L.) on wheat but, for several combinations, the EC formulation gave better suppression of progeny compared to the standard SC. However, on brown rice, only the combination of 1.0 ppm deltamethrin EC and 2.5 ppm methoprene was different than other treatments with respect to progeny development, sample weight loss caused by feeding, and weight of the feeding damage itself. Progeny production was correlated with grain damage. No progeny of Tribolium castaneum (Herbst) developed on the treated corn, but there was some variation in insect damage, with less damage in those treatments involving the EC formulation. Progeny production of Sitophilus zeamais (Motschulsky) was at the lowest in the combination of 1.0 ppm deltamethrin EC and 2.5 ppm methoprene. The resulting insect damage was the lowest in this combination as well. Results of this study were used by the registrant (Central Life Sciences) in the United States (US) to modify the commercial formulation to replace the deltamethrin SC with the EC, at label rates of either 0.5 ppm EC+ 1.25 ppm methoprene, or 1.0 ppm EC + 2.5 ppm methoprene, on wheat, corn, and rice.

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Untitled

Cited by 68 publications

References 53 publications

Combination of Methoprene and Controlled Aeration to Manage Insects in Stored Wheat

Combination of Methoprene and Controlled Aeration to Manage Insects in Stored Wheat

Pesticide free methods of maize weevil control in stored maize for developing countries

Efficacy of Combinations of Methoprene and Deltamethrin as Long-Term Commodity Protectants

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