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Antitermite Activities of C. decidua Extracts and Pure Compounds against Indian White Termite Odontotermes obesus (Isoptera: Odontotermitidae)
Ravi Kant Upadhyay,Gayatri Jaiswal,Shoeb Ahmad,Leena Khanna,Subhash Chand Jain
Psyche , 2012, DOI: 10.1155/2012/820245
Abstract: In the present investigation, we have tested antitermite responses of Capparis decidua stem, root, flower, and fruit extracts and pure compounds to Odontotermes obesus in various bioassays. Crude stem extract has shown very high susceptibility and very low LD50 values, that is, 14.171 μg/mg in worker termites. From stem extract, three pure compounds were isolated in pure form namely, heneicosylhexadecanoate (CDS2), triacontanol (CDS3), and 2-carboxy-1, 1-dimethylpyrrolidine (CDS8) which have shown very low LD50 value in a range of 5.537–10.083 μg/mg. Similarly, one novel compound 6-(1-hydroxy-non-3-enyl)-tetrahydropyran-2-one (CDF1) was isolated from flower extract that has shown an LD50 8.08 μg/gm. Repellent action of compounds was tested in a Y-shaped glass olfactometer in which CDF1 compounds have significantly repelled termites to the opposite arm. Besides this, C. decidua extracts have shown significant reduction (<0.05 and 0.01) in termite infestation in garden saplings when it was coated on cotton tags and employed over tree trunks. Further, C. deciduas stem extract was used for wood seasoning, which gave very good results as test wood sticks have shown significantly (<0.05 and 0.01) very low termite infestation.
Anti-termite efficacy of Capparis decidua and its combinatorial mixtures for the control of Indian white termite Odontotermes obesus (Isoptera: Odontotermitidae) in Indian soil
R Upadhyay, G Jaiswal, S Ahmad
Journal of Applied Sciences and Environmental Management , 2010,
Abstract: Capparis deciduas and its combinatorial mixtures were evaluated to observe the anti-termite efficacy against Indian white termite Odontotermes obesus. These have shown very high termiticidal activity and wood protection in the soil. It is proved by very low LD50 values i.e. 0.0218mg/g and 0.021mg/g obtained in stem fractions CDS3 and CDS7 respectively. When other ingredients, were used to prepare combined mixtures with C. decidua these have shown synergistic action and caused very high termite mortality in termites. Besides this, both tag binding and wood seasoning experiments significantly cut down (p<0.05 and 0.01 level) in termite infestation in garden saplings and in seasoned dry wood planted in the garden soil. Above treatments have successfully obstructed the ascending and descending movements of termites and prohibited mud plastering and tunnel formation in workers. It was found statistically significant at the level 0.05.
Effects of plant latex based anti-termite formulations on Indian white termite Odontotermes obesus (Isoptera: Odontotermitidae) in sub-tropical high infestation areas  [PDF]
Ravi Kant Upadhyay
Open Journal of Animal Sciences (OJAS) , 2013, DOI: 10.4236/ojas.2013.34042
Abstract: In the present investigation various bioassays were conducted to evaluate the anti-termite efficacy of plant latex based formulations to control population of Indian white termite in subtropical soil. Results reveal that crude latex, its fractions and combinatorial fractions have shown very high toxicity against O. obesus. The LD50 values for different latex fractions of 24 h were in a range of 5.0-17.613 μg/mg while combined mixtures of Calotropis procera have shown synergistic activity against termites and caused comparably high mortality with LD50 1.987-6.016 μg/mg. The mortality rate was found dose and time dependent as it was found to be increased with an increase in dose and exposure period. In olfactometry tests, C. procera latex solvent fractions have shown significant repellency at a very low dose 0.010-0.320 μg/mg. Interestingly, solvent fractions have significantly repelled large numbers of worker termites due to volatile action of active components of latex and different additives. ED50 values obtained in crude latex were 0.121 μg/mg body weights while combinatorial formulations have shown ED50 in between 0.015-0.036 μg/mg. Statistical analysis of repelled and un-repelled termites gave a low Chi-square value (X2
Screening of sunflower (Helianthus annuus Linnaeus) Genotypes against the attack of Odontotermes obesus (Rambur) (Isoptera: Termitidae)  [PDF]
Muhammad Aslam,Farid Asif Shaheen,Abdul Rehman
Pakistan Journal of Biological Sciences , 2000,
Abstract: Out of ten genotypes of sunflower (ISB 1-99, FJ 1-99, Sehala 1-99, Bahatar 1-99, Jatli 1-99, Jhelum 1-99, Dena 1-99, Hysun-33, Sohawa 1-99 and Triumph-573) screened against the attack Odontotermes obesus at `Chaccanwali Deri Farms under UGC/UAAR Sunflower project, Hysun -33 showed the highest number of termites per 303cm3 and also the percentage of plant damaged by this pest was highest. In Jhelum 1-99, both the numbers of termites as well as the percentage of sunflower plants damaged by Odontotermes obesus were the lowest. IBD 1-99 and Triumph -573 showed also high percentage of damaged plants and number of termites next to Hysun-33. The other genotypes were some what intermediate based upon the criteria mentioned. The results showed that on different genotypes, the number of termites varied and this information could help in evolving plant resistant to insect pest and thus by sowing the resistant genotypes, the dependence on the heavy use of insecticides will be minimized and ultimately the pollution problem due to injudicious use of insecticides will also be reduced. The number of termites and the damage done by them to the plants were positively correlated. It showed that as number of termites increased, the percentage of damage to plants by termites also increased.
Morphometric analysis of population samples of soldier caste of Odontotermes obesus (Rambur) (Isoptera, Termitidae, Macrotermitinae)  [PDF]
F. Manzoor,M. S. Akhtar
Animal Biodiversity and Conservation , 2006,
Abstract: In order to study morphometric variations in Odontotermes obesus (Rambur),samples from nineteen nests were statistically analyzed for mean, standard deviation, standard error,coefficient of variability and confidence interval (95%) and analysis of variance (Model II ANOVA), The mean values of the different population samples were compared with the student t–test, following the Minitab versionand Sokal & Rohlf (1973). In the study of external characters, measurements form a very important component, particularly for identification of species. However, the reliability of the measurements depends on the extent of variability which the structures show within and between colonies. For each individual soldier, the following nine parameters were measured: i) length of head; ii) width of head at mandibles; iii) width of headat the posterolateral ends of antennal carinae; iv) maximum width of head; v) length of left mandible; vi) tooth of left mandible from tip; vii) length of pronotum; viii) width of pronotum; ix) length of postmentum; and x) width of postmentum.
Observations of the Biology and Ecology of the Black-Winged Termite, Odontotermes formosanus Shiraki (Termitidae: Isoptera), in Camphor, Cinnamomum camphora (L.) (Lauraceae)
Arthur G. Appel,Xing Ping Hu,Jinxiang Zhou,Zhongqi Qin,Hongyan Zhu,Xiangqian Chang,Zhijing Wang,Xianqin Liu,Mingyan Liu
Psyche , 2012, DOI: 10.1155/2012/123102
Abstract: Aspects of the biology and ecology of the black-winged termite, Odontotermes formosanus Shiraki, were examined in a grove of camphor trees, Cinnamomum camphora (L.), located at the Fruit and Tea Institute, Wuhan, China. Of the 90 trees examined, 91.1% had evidence of termite activity in the form of exposed mud tubes on the bark. There was no relationship between tree diameter and mud tube length. Mud tubes faced all cardinal directions; most (60%) trees had multiple tubes at all directions. However, if a tree only had one tube, 22.2% of those tubes faced the south. The majority (>99%) of mud tubes were found on the trunk of the tree. Approximately 35% of all mud tubes had termite activity. Spatial distribution of termite activity was estimated using camphor and fir stakes installed throughout the grove. Camphor stakes were preferred. Kriging revealed a clumped distribution of termite activity.
Infestation Trend of Odontotermes obesus (Rambur) on Wheat Crop (Triticum aestivum linnaeus) in Rainfed Conditions  [PDF]
Muhammad Ijaz,Muhammad Aslam
Asian Journal of Plant Sciences , 2003,
Abstract: In the experiment conducted at University of Arid Agriculture Rawalpindi during 2002, it was concluded that there was great difference in mean infestation of Odontotermes obesus during 2nd and 9th week of the year 2002.Mean infestation percentage was maximum(7.89%) during 2nd week of the year 2002.The infestation rate then declined somewhat and remained between 5.90%- 3.10% during next five weeks. Infestation trend during 9th week declined uncertainly. Then mean infestation decreased to minimum level(I.58%) during 9th week. The reason of this great difference might be that as the crop grew to maturity, it became more vigorous and became resistant to termite attack. During the observation of the environmental factors, it was seen that rainfall and temperature were negatively correlated with mean infestation indicating inverse relationship. Humidity was positively correlated with mean infestation of Odontotermes obesus indicating direct relationship.
THE EFFECTS OF NESTS OF THE TERMITE ODONTOTERMES FORMOSANUS ON STABILITY OF THE CONSTRUCTS OF DIKES
白蚁巢系破坏堤坝稳定性的研究

Li Dong,
李栋

生态学报 , 1986,
Abstract: The termite Odontotermes formosanus is an important insect pest which is very injurious to dikes and reservoirs in South China. Its nests damage the embankments and the dikes to form usually the dangerous state or" a small leak will sink a great ship."Our experiments show that the nests of the termite Odontotermes formosanus destroy stability of the embankment and dike works. This paper would provide a basis for termite control.
Termite (Insecta, Isoptera) fauna from natural parks of the northeast region of Argentina
Laffont, Enrique Rafael;Torales, Gladys Josefina;Coronel, Juan Manuel;Arbino, Manuel Osvaldo;Godoy, María Celina;
Scientia Agricola , 2004, DOI: 10.1590/S0103-90162004000600016
Abstract: the knowledge of insect biodiversity in natural areas of argentina is limited, and termites are among the understudied taxa. in order to assess the diversity of isoptera in some protected areas of the country, termite sampling within three national parks of the northeast region of argentina was developed during 1995-1999. the results presented in this paper correspond to the chaco national park (province of chaco), iguassu national park (province of misiones) and mburucuya national park (province of corrientes). among the four termite families recorded from argentina, the family termitidae was the best represented at the three sampled areas. the recorded genera (15) were: rugitermes holmgren and tauritermes krishna (kalotermitidae), heterotermes frogatt (rhinotermitidae), cornitermes wasmann, cortaritermes mathews, diversitermes holmgren, nasutitermes dudley, velocitermes holmgren (nasutitermitinae), amitermes silvestri, microcerotermes silvestri, neocapritermes holmgren, termes linné (termitinae), anoplotermes müller, aparatermes fontes and ruptitermes mathews (apicotermitinae) (termitidae). none of the collected termite species was common to the three national parks, and only four of them were detected at two of the reserves. due to the particular assemblage of termites found at each park, these three natural protected areas could be considered important reserves for the conservation of the termite fauna from the northeast region of argentina.
Termite (Insecta, Isoptera) fauna from natural parks of the northeast region of Argentina  [cached]
Laffont Enrique Rafael,Torales Gladys Josefina,Coronel Juan Manuel,Arbino Manuel Osvaldo
Scientia Agricola , 2004,
Abstract: The knowledge of insect biodiversity in natural areas of Argentina is limited, and termites are among the understudied taxa. In order to assess the diversity of Isoptera in some protected areas of the country, termite sampling within three National Parks of the Northeast region of Argentina was developed during 1995-1999. The results presented in this paper correspond to the Chaco National Park (Province of Chaco), Iguassu National Park (Province of Misiones) and Mburucuya National Park (Province of Corrientes). Among the four termite families recorded from Argentina, the family Termitidae was the best represented at the three sampled areas. The recorded genera (15) were: Rugitermes Holmgren and Tauritermes Krishna (Kalotermitidae), Heterotermes Frogatt (Rhinotermitidae), Cornitermes Wasmann, Cortaritermes Mathews, Diversitermes Holmgren, Nasutitermes Dudley, Velocitermes Holmgren (Nasutitermitinae), Amitermes Silvestri, Microcerotermes Silvestri, Neocapritermes Holmgren, Termes Linné (Termitinae), Anoplotermes Müller, Aparatermes Fontes and Ruptitermes Mathews (Apicotermitinae) (Termitidae). None of the collected termite species was common to the three National Parks, and only four of them were detected at two of the reserves. Due to the particular assemblage of termites found at each park, these three natural protected areas could be considered important reserves for the conservation of the termite fauna from the Northeast region of Argentina.
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