| Autor: |
Mariadoss, A., Umamaheswari, S. |
| Předmět: |
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| Zdroj: |
Journal of Experimental Zoology India; Jul2020, Vol. 23 Issue 2, p1361-1367, 7p |
| Abstrakt: |
Food grain storage plays a vital role in ensuring food security in India. Food grains under storage are affected both qualitatively and quantitatively by several insect pests. The red flour beetle, T. castaneum is an important secondary storage pest that damages the food grains. The present experiment aimed to study the population fluctuations of T. castaneum (larva and adults) in different seasons of the year in bagged food grains stored in bulk quantities in a large food grain warehouse and was conducted consecutively for 2 years (February 2017 to January 2019). Three godowns of 5000 MT capacity was selected and a total of 27 stacks were selected randomly to draw representative samples from each stacks to find out the population of T. castaneum. Significantly higher mean populations were recorded during months of May (5.71 ± 0.23), June (5.37 ± 0.22) and July (4.61 ± 0.28). Significantly lesser population in food grains were recorded during December (0.74 ± 0.11) and January (0.86 ± 0.06) month. During the month of October, November, December, January and February the mean population of T. castaneum recorded was lesser than 2 insects per 500g of representative sample, which is classified under ‘FEW’ classification with reference to infestation level. The correlation and regression analysis revealed that temperature significantly influenced the development of T. castaneum population in large food grain warehouse. The results also shown that as the temperature increased from 25°C, there was increase in the population of T. castaneum and higher population were recorded during the months with temperature above 30°C which showed that there is a vital role of temperature in population build-up of T. castaneum in large food grain warehouses. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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