Font Size: a A A

The Study On Biological Characteristics Of Papilio Polytes (Linnaeu)

Posted on:2010-10-25Degree:MasterType:Thesis
Country:ChinaCandidate:Y LiaoFull Text:PDF
GTID:2120360275985068Subject:Agricultural Entomology and Pest Control
Abstract/Summary:PDF Full Text Request
Papilio polytes( Linnaeu) is one of the most important butterfly with the characteristics of wide distribution, large in quantity and rich in germplasm resources. By using artificial rearing method, this paper pilotly studied on growth and development and activity rhythm from egg to adult. The results are as follows:Overwinter ended at the beginning of March. The activity peak of the adults was in May.Then it reduced in the middle of September. From early November, the number of the adults increased gradually and overwinter with pupae. Pupaes attached to the branches of host plants and other plants hereabout. The wintering period of pupae was from 98~121d. It had seven generations each year and the generations overlapped. The larval stage had five instars with four moltings.Eggs hatch all the day long, most in the daytime with its peak at 9 to 14 o'clock (70.16%).But no individual hatched from 20 to 6 o'clock.When eggs were treated at 5℃and 10℃for 1 day, 3 days respectively, the average hatchability of the eggs were 58.52% and 53.70% respectively. When eggs were treated at 5℃and 10℃for 7 days, 10 days respectively, the average hatchability of the eggs decreased significantly to 41.67%,22.59%.In the aspect of egg development, the highest hatchability happened when the 2-day-old eggs treated at 5℃and 10℃, the average hatchability of the eggs were 50.28% and 55.25% respectively.Larval molting occurred in the early morning to noon mostly. By laboratory rearing and observations, it was found that the survival rate was highest when the 5th instar larvae were raised in the box with 30 indiveduals. The pupation rate and emergence rate were 83.33% and 94.61% respectively. The lowest pupation rate was 76.11% when the 5th instar larvae were raised in the box with 60 indiveduals.The results indicated that the mortality of the 1st, 2nd and 5th instar larval all increased with the time of starvation. All of three instars larval died before emergence. The starvation endurance ability increased with their growth stages. The larvae grew best with the highest survival, pupae weight and emergence rate when fed on navel orange from that on other host plants tested. All larvae fed on radixzanthoxyli died before the 5th instar.Every larval stage was dealt with 5 sorts of photoperiod of light to dark at 8:16, 10:14,12:12, 14:10 and 16:8. The result showed that the growth and development life span, larvae survival rate, the average pupa weight, and the emergence rate are the best at 12:12 from other photoperiod. Next was 14:10,8:16 led to the worst state of growth and development. The longer the light was, the faster larvae developed.Most of the 5th instar larve (57.20%) pupated at 9 to 11 o'clock. No individual pupated at 18 to 7 o'clock and 12 to 15 o'clock. Most pupae (89.34%) emerged at 4 to 6 o'clock in the early morning with the peak at 5 to 6 o'clock. No emergence occurred at 9 to 3 o'clock.The color of pupal had relation with the contact point. Pupation occurred in glass petri dish are completely green.Pupae in different developmental days were stored at 5℃. The low temperature resistance of pupaes were best which developed 3~5 days. 7-day-old pupaes refrigerated for 15 days had a low emergence rate of 3.33% .The adult started flying after emergence completely. The peak active period occurred at 10:00~12:00 and 17:00~18:00. Main activity contents include ingest honey, mating and and oviposition. The adult copulated on the day of its eclosion. The mating of adult occurred mainly in the interval of 9:00~12:00. Temperature and weather were main factors effect adult's activities. Female adults can oviposit during the daytime except 12:00~13:00. The oviposition peak appeared at 9:00~12:00. The eggs were laid singularly. Female adults preferred to lay their eggs on Citrus limon.The fecundity was 35.29%.Different nectariferous plants and colors had different comether function to adults:1) Comether function of Papilio polytes to different kinds of nectariferous plants: Pentas lanceolata(36.00%) had the strongest attractive effect, Gymnocoronis spilanthoides had no temptation to Papilio polytes; red and orange had the best attractive effect, the attractant percent were 43.06% and 30.88% respectively. White had the worst effect, the attractant percent was 2.63%.
Keywords/Search Tags:Butterfly, rutaceae, Papilio polytes, biological characteristic
PDF Full Text Request
Related items