This study was carried out to obtain information about the bionomical characteristics and nutritional components of larva white-spotted flower chafers (Protaetia brevitarsis seulensis) larvae on supplementary feeds and differential feeding sources.
For this proposes, we investigated effects on ...
This study was carried out to obtain information about the bionomical characteristics and nutritional components of larva white-spotted flower chafers (Protaetia brevitarsis seulensis) larvae on supplementary feeds and differential feeding sources.
For this proposes, we investigated effects on body length, body width, body weight and mortality of white-spotted flower chafers larva depending on supplementary feeds such as aloe, apple, banana, persimmon and sweet pumpkin purchased from market. Weight of larvae showed the most amount of 2,966 ㎎ in sweet pumpkin, followed by banana and sweet persimmon. Weight exhibited the lowest value of 2,127 ㎎ in aloe similar with control. The treated group with sweet pumpkin showed the highest cumulative increase of 240% in body length and the next the persimmon was 232%. The sweet pumpkin showed the highest cumulative increase of 254% in body width, whereas the control presented the lowest cumulative increase of 232%. The sweet pumpkin showed the highest cumulative increase of 240% in the body weight, following order to persimmon, banana, and apple. Mortality showed the highest mortality rate of 19.8% in sweet pumpkin and apple and banana, whereas the lowest mortality rate showed a mortality rate of 13.2% in the control. It is assumed that sweet pumpkin, persimmon and banana are possibility of high application as a supplementary feed. However, it is suggested that their supplementary feeds are studied in various feeding ways how to reduce changes of the artificial breeding environment.
Another experiment was carried out to examine the changes in body characteristics, larval mortality and nutritional components of Protaetia brevitarsis seulensis larvae according to differential feeding sources. The breeding of larvae was done by oak sawdust-fermented feed as a basal feed, and differential feeding sources were prepared by the basal feed individually supplemented with 1% of aloe, apple, banana, sweet persimmon, and sweet pumpkin powders. The result showed no any significant effect on feeds on larval weight in early time. However, when larvae were harvested by completely grown form, effects on feeds in developmental parameters were significantly found by various patterns. The cumulative increases on body length and width, and increases of body weight were also observed in apple feeding source. The lowest increment of developmental parameters were showed in banana feeding source. The highest mortality (11.2%) was simultaneously occurred in aloe, banana, persimmon and sweet pumpkin feeding sources. The lowest mortality (9.9%) rate was observed in apple. As results of analysis, differential crude protein and fat contents were discovered according to feeding sources. These changes of the huge materials in content were found to be interconverted into each other depending on the feeding sources. The contents of inorganic phosphate, potassium, magnesium, and sodium among mineral components were reduced owing to the additive feed sources, but calcium content was increased by the feeds. Oleic acid (C18:1) appeared in the most amount of an average 60.5% among components of fatty acid, and unsaturated fatty acids occupied high proportion as 72.8%. However, when compared with control, Protaetia brevitarsis larvae reared with the supplementary feeds were reduced for proportion of unsaturated fatty acids. In addition, free and total amino acid contents were down when compared to those of control, especially, glutamic acid was reduced by the most content. It is assumed that feeds such as apple, sweet pumpkin, and aloe are employed as a optimum diet for mass rearing of P. brevitarsis seulensis in laboratory. However, some of sulfur-containing and aromatic amino acids increased a part or overall contents in the larvae with supplementary feeds when compared with those of control.
In summary, we suggest that the additive feeds employed in this study are possible to improve the nutritional components of Protaetia brevitarsis larvae.
This study was carried out to obtain information about the bionomical characteristics and nutritional components of larva white-spotted flower chafers (Protaetia brevitarsis seulensis) larvae on supplementary feeds and differential feeding sources.
For this proposes, we investigated effects on body length, body width, body weight and mortality of white-spotted flower chafers larva depending on supplementary feeds such as aloe, apple, banana, persimmon and sweet pumpkin purchased from market. Weight of larvae showed the most amount of 2,966 ㎎ in sweet pumpkin, followed by banana and sweet persimmon. Weight exhibited the lowest value of 2,127 ㎎ in aloe similar with control. The treated group with sweet pumpkin showed the highest cumulative increase of 240% in body length and the next the persimmon was 232%. The sweet pumpkin showed the highest cumulative increase of 254% in body width, whereas the control presented the lowest cumulative increase of 232%. The sweet pumpkin showed the highest cumulative increase of 240% in the body weight, following order to persimmon, banana, and apple. Mortality showed the highest mortality rate of 19.8% in sweet pumpkin and apple and banana, whereas the lowest mortality rate showed a mortality rate of 13.2% in the control. It is assumed that sweet pumpkin, persimmon and banana are possibility of high application as a supplementary feed. However, it is suggested that their supplementary feeds are studied in various feeding ways how to reduce changes of the artificial breeding environment.
Another experiment was carried out to examine the changes in body characteristics, larval mortality and nutritional components of Protaetia brevitarsis seulensis larvae according to differential feeding sources. The breeding of larvae was done by oak sawdust-fermented feed as a basal feed, and differential feeding sources were prepared by the basal feed individually supplemented with 1% of aloe, apple, banana, sweet persimmon, and sweet pumpkin powders. The result showed no any significant effect on feeds on larval weight in early time. However, when larvae were harvested by completely grown form, effects on feeds in developmental parameters were significantly found by various patterns. The cumulative increases on body length and width, and increases of body weight were also observed in apple feeding source. The lowest increment of developmental parameters were showed in banana feeding source. The highest mortality (11.2%) was simultaneously occurred in aloe, banana, persimmon and sweet pumpkin feeding sources. The lowest mortality (9.9%) rate was observed in apple. As results of analysis, differential crude protein and fat contents were discovered according to feeding sources. These changes of the huge materials in content were found to be interconverted into each other depending on the feeding sources. The contents of inorganic phosphate, potassium, magnesium, and sodium among mineral components were reduced owing to the additive feed sources, but calcium content was increased by the feeds. Oleic acid (C18:1) appeared in the most amount of an average 60.5% among components of fatty acid, and unsaturated fatty acids occupied high proportion as 72.8%. However, when compared with control, Protaetia brevitarsis larvae reared with the supplementary feeds were reduced for proportion of unsaturated fatty acids. In addition, free and total amino acid contents were down when compared to those of control, especially, glutamic acid was reduced by the most content. It is assumed that feeds such as apple, sweet pumpkin, and aloe are employed as a optimum diet for mass rearing of P. brevitarsis seulensis in laboratory. However, some of sulfur-containing and aromatic amino acids increased a part or overall contents in the larvae with supplementary feeds when compared with those of control.
In summary, we suggest that the additive feeds employed in this study are possible to improve the nutritional components of Protaetia brevitarsis larvae.
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