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Attractive Activity Of Plant Materials Against Termite And Scanning Electron Microscopy Studies Of Antennal Sensillae Of Termite

Posted on:2012-03-12Degree:MasterType:Thesis
Country:ChinaCandidate:J WangFull Text:PDF
GTID:2143330335957023Subject:Pesticides
Abstract/Summary:PDF Full Text Request
Termites are social insects that currently rank as one of the world's top five pests having a significant impact on the human life and national economy. But these features make the termite control trouble that of small size, quickly propagation, hidden activities and migration. Currently the primary way of termite control is chemical control. But with improvement of environmental protection consciousness, some effective termite pharmaceutical has been banned gradually. Therefore, development of new pesticide including botanical pesticides and new termite prevention and control technology became a major route on termite control study.Adding the termite prefer bait into termite baits can improve termite feeding amount and to improve the control effect against termite. Based on this, many plant materials were screened in this study, and got the best materials:eucalyptus powder andβ-pinene. Determined the field test results of eucalyptus powder and P-pinene. In addition, identified the other effect of P-pinene on termites, as well as the type of sensilla on termite antennae and the number and distribution of sensilla. Hope can provide a theoretical reference for application of bait.1. Determined the attractive effect of 12 plant materials and 12 plant essential oils against R. speratus and got the result of that eucalyptus powder andβ-pinene have the most obvious effect through repeated determination;2. Measured the fumigation activity ofβ-pinene under the conditions of 25℃and 24h fumigation, the LC50 were 1.73677μL/L on R. speratus and 1.24322μL/L on O. formosanus. Then through determination got the LC50 ofβ-pinene poisonous activity on R. speratus were 64.39060, 51.20602, and 45.70153μL/L under the 24h,48h and 72h treatment time; the LC50 on O. formosanus were 56.09578,39.33843 and 34.99713μL/L under the 24h,48h and 72h treatment time.3. By measuring eucalyptus powder andβ-pinene attractive activity in the field, you can get: eucalyptus powder addingβ-pinene (30g:10.0μL) had the best effect, followed by the other three treatmeats, including eucalyptus powder adding P-pinene adding water, eucalyptus powder and pine powder, and there are no significantly difference.4. The antennae of three Termite species (Odontotermes formosanus (Shiraki), Reticulitermes speratus (Kolbe) and Coptotermes formosanus Shiraki) are moniliform in shape. Each antenna is composed of scape, pedicel and a long flagellum with 11-15 flagellomeres that are species specific. The flagellum is composed of 15 sub-segments in both workers and soldiers of O. formosanus; 13 sub-segments in workers of C. formosanus; 11 sub-segments in soldiers of C. formosanus:13 sub-segments in both workers and soldiers of R. speratus.Five morphologically different types of sensilla are seen on the antennae of the three termite species:Bohm bristles, sensilla trichoid, sensilla chaetica, sensilla basiconica and sensilla calyptrate. Bohm bristles occur on the base of scape and pedicel; Sensilla chaetica occur on the whole antenna; Sensilla trichoid, and sensilla basiconica can be found on the flagellomeres of antenna; Sensilla calyptrate only can be found on the flagellomeres of O. formosanus workers.5. Compared the length of antenna and the variety, quantity and distribution of antenna sensilla of three types of workers, and described the relationship between antenna sensilla and termite feeding.
Keywords/Search Tags:Termite, Scanning Electron Microscopy, Antennal Sensillae, Plant, Essential Oil, Attractive Effect
PDF Full Text Request
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