HORTICULTURE SCIENCE
ENTOMOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The number of hours a dead body has been outside.
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The number of hours it takes for an insect species to become an adult.
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The number of hours a body has been dead.
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The number of hours it takes for an insect species to develop to a given stage.
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Detailed explanation-1: -One degree-day is one day (24 hours) with the temperature above the lower developmental threshold by one degree. For instance, if the lower developmental threshold for an organism is 51°F and the temperature remains 52°F (or 1° above the lower developmental threshold) for 24 hours, one degree-day is accumulated.
Detailed explanation-2: -The ADH was calculated for L. sericata life cycle in both cases by using the following formula: ADH=Time (Hrs.) ×(Average temperature-Minimum development threshold temperature) and the reference developmental durations for L.
Detailed explanation-3: -Forensic entomologists identify insects from the crime scene, using accumulated degree hours (ADH) to estimate an approximate time of death. The ADH information allows forensic entomologists to estimate the time involved in developing the current stages of insect succession, in accordance with local conditions.
Detailed explanation-4: -The formulae for calculating ADH is: ADH = Time (hrs.) X (Average temp. – Minimum development threshold temperature).