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Biological Characteristics of the Cabbage Beetle, Colaphellus Bowringi in Relation to Reproduction, Mating Behavior and Developmental Rate

Author: KuangXianZuo
Tutor: XueFangSen
School: Jiangxi Agricultural University,
Course: Zoology
Keywords: Colaphellus insects Diapause duration Spawning Mating Temperature Developmental rate proportional hypothesis
CLC: S433
Type: Master's thesis
Year: 2011
Downloads: 50
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Abstract

Large bowringi Colaphellus bowringi Baly genus the Coleoptera Coleptera, Chrysomelidae Chrysomelidae, missed the leaf beetle genus Colaphellus, is an important leaf-eating pests of cruciferous vegetables on. Thesis Colaphellus insects material system to study the impact of different duration of diapause eggs of the pest insect's mating behavior, the temperature of the mating behavior of insects. Finally, the use of insect developmental rate proportional hypothesis as materials testing. 1. Unearthed time Colaphellus spring insect life and fertility comparison: in the field, the large bowringi C.bowringi breeding period in the spring and autumn to adults in the soil summering and wintering. A detailed comparison of the experiments in the laboratory 20 ° C, LD12: 12 conditions of the large bowringi Longnan populations the same time (October) buried diapause under natural conditions, the spring of the second year of 2,3 month unearthed breeding adult life and fecundity. The results showed that: February unearthed male and female adults lived significantly shorter unearthed in March adult day average fecundity difference is not significant, the total fecundity due to the impact of life was significantly lower than in March unearthed adult. This result display the large bowringi season early than later unearthed unearthed adults adult poor adaptability. 2. The Colaphellus insect mating behavior observed: Colaphellus worm C. bowringi life many times mate. This experiment at 25 ℃, photoperiod LD12: 12 under the conditions of the system observed the mating behavior of the great apes leaf beetle adults for seven consecutive days. The results show that: the insect daily average mating 5.67 0.26 times, up to 11 times, different days of mating frequency there are significant differences. Average the day mating time for 238 10min, 33.5% of the total time, up to 493min, accounting for 68.5% of the total time the time of mating between different days very significant difference. Mating duration shortest possible 8min, up to 289min, an average of 48 2min; same day, with the increase in mating frequency, mating duration gradually shortened; significant difference in mating duration exist between different days. The shortest interval between two adjacent mating 5min, the longest 300min, average mating interval 75 3min; mating interval was significantly prolonged with the increasing of days. Influence of temperature on insect mating behavior of Colaphellus: light cycle LD12: 12, 22 ° C, 25 ° C and 28 ℃ temperature, we detailed observations of insect mating rhythm, the duration of the day mating frequency, mating and each day total mating time. The results show that the insect's mating rhythm is affected by the temperature over 25 ℃ and 28 ℃ the mating peak (8:00 am), 22 ° C under the mating peak (9:00 am) delayed 1 hour. Temperature had a significant effect on mating frequency and mating duration 22 ° C under Japanese mating frequency was significantly lower than 25 ℃ and 28 ℃, copulation duration was significantly longer than 25 ℃ and 28 ℃. However, insect total daily mating time was similar in all three temperatures, suggesting day mating frequency decreases at low temperatures is due to the extension in mating duration. Five statistical methods for the determination of developmental rate proportional hypothesis: the ratio of the duration of biological developmental stages is called developmental rate ratio independent of temperature. 16-30 ℃ (in increments of 2 ℃) temperature of 8, we have documented in detail the data of the large bowringi C. bowringi developmental stages and five analytical methods to test the hypothesis of developmental rate and the proportion of these five The analysis methods include: 1) the direct use of to describe developmental rate based on the traditional linear equations linear function more standard error of the developmental threshold temperature (Campbell et al, 1974), 2) based on improved linear Ikemoto and Takai (2000) equation analysis of covariance at different stages of the developmental threshold temperature, 3) Jarosik (2002), 4) the ratio of the variance of each developmental time analysis, 5) Pei Jian et al (2010) method. Our results show that the developmental threshold temperature or the ratio there is no significant difference, and is strongly confirmed the hypothesis of developmental rate proportional.

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CLC: > Agricultural Sciences > Plant Protection > Pest and Disease Control > Plant pest and its control
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