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摘要
Understanding the susceptibility of commercially available animal feeds which contain Dried Distiller's Grains with Solubles (DDGS) to insect infestation is the first step in developing a pest management strategy for a stored product. This study is a nascent analysis of animal feed containing DDGS susceptibility to Tribolium castaneum (Herbst) infestation, one of the most important post-harvest insect pests world-wide. Three types of animal feed containing 5-10% DDGS in their formula mixtures were obtained from two feed manufacturers in Indiana, USA including: crumbled poultry feed, pelletized juvenile frog feed, and pelletized adult frog feed. Besides commercially available animal feed, laboratory manufactured feed were simulated by mixing Flour/Yeast (F/Y), T. castaneum normal laboratory diet, with 10, 20, 30, 40, and 80% DDGS (% based on weight). Larval developmental time was used to evaluate feed susceptibility to T castaneum infestation. The T. castaneum larval period was significantly increased when fed on pelletized adult frog feed, pelletized juvenile frog feed, and crumbled poultry feed (29.8 +/- 0.5, 26.0 +/- 0.3, and 21.9 +/- 0.3 d respectively), compared with F/Y (16.1 +/- 0.3 d). The larval period was significantly decreased however, when fed on ground poultry feed (15.5 +/- 0.2 d). Insect development on laboratory manufactured feeds was similar to F/Y regardless of DDGS ratios added in this study (15.9-16.9 d). These results suggested that first; particle size (PS) was one of the influential factors on susceptibility of commercially available animal feed to T castaneum apart from feed chemical composition, and second, adding 10-80% DDGS to the laboratory manufactured feed did not change feed susceptibility to T castaneum infestation.
- 出版日期2017-5
