• Korean journal of applied entomology
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• v.33 no.3
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• pp.173-177
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• 1994

his study was conducted to Investigate the occurrence of small brown planthopper (SBPH), LaodeIpahx striatellus Fallen, and the ind~cence 01 rice virus diseases by d~fferent seeding dates in dryseeded rice. The occurrerlce of SBPH was the highest an nce seeded in May 11, followed byMay 1, May 21 and May 31. However. SBPH dld not occur on the rice seeded in June 10 duelo the rice was emerged after peak occurrence of first generailon adult of SBPH. The occurrenceof the first generation adult of SBPH was May 11 and it was 3-day earlier than that of infantnce transplanting. The ~nd~cencofe rice vlrus diseases, rice stripe vilus (RSV) and rice black-streakeddwarf virus (RBSDV), was the most severe at seeding date May 11. and then followed by May1, May 21 and May 31 Thus the incidence of "ce virus diseases was closely related with thedensity of the first generat~on adult of SBPH Rice yield was decreased by later seeding dates, although rice yield from May 1 to May 21 was relatively stable and hqii compared with laterseeding dates. Accordingly, there was slgniilcant relatlonsh~p between rice yield and seeding datesice yield and seeding dates

• Journal of the Korean Applied Science and Technology
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• v.34 no.3
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• pp.613-622
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• 2017

The object of this study was to determine the influence of dietary metabolic energy (ME) on ..... A total of 240 meat ducks Cherry valley (Anas platyrhynchos) were assigned into four treatment groups with a randomized block design for 42 days. The four treatments were: ME 2900 kcal/kg, ME 3000 kcal/kg, ME 3100 kcal/kg, and ME 3200 kcal/kg. There was no difference in liver tissue among the treatments. The duodenal villi and crypt depth length decreased by 10.58% in 2900 compared with ME 3000, but there was no difference between 3100 and 3200. Counts of caecal Latobacillus decreased by 9.47% in 2900 compared to ME 3000, but increased by 2.52 and 3.24% in 3100 and 3200, respectively. Total aerobic bacteria, E. coli and Coliform bacteria were increased by 2900 when compared to ME 3000, but there was no difference between 3100 and 3200. HSP $90-{\alpha}$ among the heat shock proteins (HSPs)-mRNA in the liver was reduced by 48.60% in 2900 compared to ME 3000, while 3100 and 3200 showed no difference or increased.