| antimicrobial, insect sterilizing and ovicidal activity of some oxo-vanadium(iv) and oxo-vanadium(v) complexes. | twenty-three newly synthesized mixed-ligand complexes of oxo-vanadium(iv) and oxo-vanadium(v) were studied for antimicrobial activity. eight of these complexes were found to have microbicidal properties. the complexes [nh4][vo(gl)2]h2o (gl-h2 = glycolic acid) and [vo(acoap)(acac-h)]h20 (acoap-h2=schiff base of acetylacetone and orthoaminophenol, acac-h=acetyl-acetone) show broad bactericidal spectra, while the complexes [vo(acsam)2]oh (acsam-h = schiff base of acetylacetone and sulphanilamide) ... | 1982 | 6983826 |
| efficiency of mannose-binding plant lectins in controlling a homopteran insect, the red cotton bug. | yield losses of different crops due to the attack of various classes of insects are a worldwide problem. sucking type homopteran pests causing damage to many crop species are not controlled by commonly known insecticidal proteins, namely, bacillus thuringiensis delta-endotoxin (bt). this study describes the purification of mannose-binding lectins from three different monocotyledonous plants (allium sativum, colocasia esculenta, and diffenbachia sequina) and their effects on a homopteran insect, ... | 2002 | 12405774 |
| insecticidal activity of the enantiomers of fipronil. | the two enantiomers of the insecticide fipronil were made by preparative hplc. the insecticidal activities of the racemic mixture and the two enantiomers against selected agricultural or household pests (cotton stainer, dysdercus cingulatus f; grain weevil, sitophilus granarius l and house fly, musca domestica l) were determined. there was no significant difference in acute or residual activity between the racemic mixture and the enantiomers of fipronil, indicating that there is no preferred chi ... | 2003 | 14667049 |
| [mechanoreceptors of the hair sensilla on the antenna of the red cotton bug dysdercus intermedius dist]. | | 2016 | 5070013 |
| route of infection and hematological effect of metarhizium anisopliae (metsch.) sorokin on dysdercus cingulatus (fab.) adult. | the primary objective of this work was to identify, under laboratory conditions, the route of infection and hemogram of dysdercus cingulatus (fab.) adults by metarhizium anisopliae. the infection process in d. cingulatus by m. anisopliae involved the conidia adherence to the host cuticle and germination after 24 h post-infection, accompanied by falling of bristles. the subsequent step, within 24-48 h post-infection, comprised penetration of fungus through spiracles, root of bristles, hemolymph, ... | 2014 | 23456609 |
| chemically mediated prey-approaching behaviour of the reduviid predator rhynocoris fuscipes (fabricius) (insecta: heteroptera: reduviidae) by y-arm olfactometer. | the reduviid predator, rhynocoris fuscipes (fabricius) (heteroptera: reduviidae) is a potential predator inhibiting diverse agroecosystems and preying upon about 50 minor as well as major insect pests. the prey approaching behaviour of r. fuscipes (fabricius) to the hexane extracts of insect pests viz., helicoverpa armigera hubner, spodoptera litura (fabricius), achaea janata linnaeus, dysdercus cingulatus fabricius and mylabris indica thunberg was assessed in y-shaped olfactometer in terms of e ... | 2013 | 24511748 |
| per os efficacy of ajuga extracts against sucking insects. | we studied the efficacy of water-soluble extracts from four ajuga spp on the post-embryonic development of two exopterygota (sucking insect) species. to allow comparison between different ajuga species, results are expressed in terms of quantity of plant extracted per litre of test solution. crude methanolic extracts of all ajuga plants tested, with the exception of a genevensis, showed considerable per os efficacy against larvae of both dysdercus cingulatus f and acyrthosiphon pisum (harris) ev ... | 2004 | 15532684 |
| mass rearing and augmentative biological control evaluation of rhynocoris fuscipes (hemiptera: reduviidae) against multiple pests of cotton. | rhynocoris fuscipes (fab.) (hemiptera: reduviidae) is a generalist predator of cotton pests and is commonly found inhabiting cotton-growing regions in southern india. with the goal of integrating this predator in standard management practices used against cotton pests on a commercial scale, (1) we developed a protocol for adult group rearing of this predator inside micro-environmental cages (mecs), and (2) we evaluated the biocontrol potential of mass-produced predators against cotton pests unde ... | 2017 | 28127861 |
| solid lipid microparticle formulations of the pyrethroid gamma-cyhalothrin-incompatibility of the lipid and the pyrethroid and biological properties of the formulations. | pyrethroids such as gamma-cyhalothrin (gch) are valuable insecticides that possess a high and unwanted toxicity towards aquatic organisms. the aim of the present study was to test the ability of the solid lipid nanoparticle technology to reduce the aquatic toxicity and concurrently retain the insecticidal activity of gch. applying the lipid compritol) 888 ato and homogenising the crude o/w emulsions of melted gch and compritol at different pressures, 150-1500 bar, solid lipid microparticle formu ... | 2003 | 12526821 |
| the distribution and function of microtubules in nutritive tubes. | the density and distribution of microtubules in the nutritive tubes of three hemipteran insects, corixa punctata, notonecta glauca and dysdercus cingulatus, were analysed from electron micrographs by computer. both parameters varied amongst all three species, the density of microtubules in corixa being approximately three times that seen in dysdercus. the density and distribution of microtubules within the nutritive tubes correlated directly with the size of particle transported by them, suggest ... | 1977 | 929581 |
| impact of seawater on development and reproduction of red cotton bug, dysdercus cingulatus (fab.). | distribution pattern of animals, modification of their life cycle and behaviours have been governed by climatic changes. it affects the insect from egg to adults. eggs always face lot of stress either from biotic or abiotic threats. this study examined the flooding of dysdercus cingulatus eggs with seawater alone and in combination with fresh water on the egg hatchability, survival and development, fecundity and hatchability of the hatched nymphs and adults, respectively under laboratory conditi ... | 2012 | 23033688 |
| new synthetic precocenoids as potential insect control agents. | ageratochromes or precocenes are known for their insect growth regulating (igr) activity. the present investigation was taken up with an objective to look for the lead structure in these compounds which can be elaborated synthetically to obtain useful growth regulators for practical purposes. with this in mind, some variants of precocenes were synthesized in the laboratory and tested for their toxicity and growth regulating activity using red cotton bug dysdercus koenigii as the test insect. mos ... | 2008 | 19297999 |
| identification and partial characterization of juvenile hormone esterase from cotton pest dysdercus cingulatus. | juvenile hormone esterase (jhe), a selective enzyme that hydrolyzes the methyl ester of insect juvenile hormone plays an important role in regulating metamorphosis in nymphs as well as reproduction in adults. studies on jh degradation provide insight into the possibilities of physiological disruption in the insects. in the present study, the jh degrading enzyme, jhe from the cotton pest dysdercus cingulatus (heteroptera) is characterized. electrophoretic analysis of haemolymph during various dev ... | 2008 | 21086726 |
| juvenile hormone activity in dysdercus cingulatus fabr by juvenile hormone esterase inhibitor, otfp. | application of juvenile hormone esterase inhibitor 3-octylthio-1,1,1- trifluropropan-2-one (otfp) to 5th instar nymphs and virgin females of d. cingulatus revealed the profound role played by juvenile hormone esterase (jhe) in metamorphosis and reproduction. the ability of otfp to cause delay and the formation of malformed nymphs, suggests that inhibition of jhe in vivo maintains a higher than normal hemolymph jh titer. it is obvious that otfp does inhibit in vivo jhe activity in late instar nym ... | 2007 | 17948739 |
| modulatory influence of juvenile hormone analogue (jha) and 20-hydroxyecdysone on lipophorin synthesis in red cotton bug, dysdercus cingulatus fabr. | topical supply of methoprene, a juvenile hormone analogue (jha) caused notable morphological disturbance in insects. topical supply of methoprene to newly emerged adult female d. cingulatus caused notable disturbance and induced a dramatic reduction in the total haemolymph protein pattern and lipophorin production in tissues like fat body, ovary and haemolymph. total protein concentration in haemolymph also showed significant reduction in 1 day old insects but increased slightly as age advanced. ... | 2005 | 16359131 |
| insecticidal action of the polyphenolic rich fractions from the stem bark of streblus asper on dysdercus cingulatus. | extracts from the stem bark of streblus asper possess insecticidal activity against the fifth instar of dysdercus cingulatus. methanolic extract showed an lc(50) value of 5.56 microg/insect. partition with chloroform increased the insecticidal activity (lc(50) 2.01 microg/insect). three polyphenolic rich fractions were obtained from silica-gel column chromatography of the chloroform fraction and found to have noteworthy insecticidal activity (lc(50): 1.82 microg, 2.70 microg, 2.26 microg/insect) ... | 2003 | 14630171 |
| effects of anti-ecdysteroid quaternary derivatives of azole analogues of metyrapone on the post-embryonic development of the red cotton bug (dysdercus cingulatus f). | in order to improve the larvicidal activity of the azole analogues of metyrapone, previously found to have a strong inhibitory activity on ecdysone 20-monooxygenase (e-20-m) from the fleshfly neobellieria bullata parker, soft-alkylated compounds (3-(1,1-dimethyl-2-oxo-2-phenylethyl)-1-dodecanoyloxymethyl-1h-imidazolium chloride, spim) and (1-(1,1-dimethyl-2-oxo-2-phenylethyl)-4-dodecanoyloxymethyl-1h-1,2,4-triazolium chloride, sptm), derivatives of phenyl-imidazolyl-metyrapone (pim) and phenyl-1 ... | 2003 | 12701700 |
| insect growth regulators. xxv. chemical approach to the correlation of dynamic structure and biological activity of juvenile hormone analogues. | on the basis of flexibility of the carbon skeleton of a juvenoid molecule, an analysis of its steric properties required to induce a biological effect in insects dysdercus cingulatus and tenebrio molitor, is presented. steric analyses of "branched" juvenoids and some derivatives of farnesoic acid differing in position of the double bonds, are also described. | 1994 | 7732753 |
| thiourea as a xenobiotic, showing its adverse effects on mortality, behaviour and metamorphosis and on histopathological and cytological changes in the developing ovaries of dysdercus similis. | the effect of thiourea (applied topically, in different concentrations, to the eggs and all the nymphal instars, and to adults also by feeding) on the red cotton-bug dysdercus similis was studied. the eggs were severely affected (i.e. mortality was high), while the nymphal instars showed an adverse effect on ecdysis and adults which emerged from the treated last nymphal instar were characterized by high mortality, abnormal behaviour and reduced fecundity and viability. they were also smaller, we ... | 1991 | 1793984 |
| movement of mitochondria in the ovarian trophic cord of dysdercus intermedius (heteroptera) resembles nerve axonal transport. | the motile behaviour of mitochondria in the ovarian trophic cord of the red cotton bug, dysdercus intermedius, was observed optically using video-enhanced differential interference contrast (avec-dic) microscopy. the motion of 258 video-recorded mitochondria was analysed of which 10%-30% were found to move during the observation periods. of the moving mitochondria 76% travelled towards the oocyte with an average velocity of 3.37 μm/ min, and 24% towards the tropharium with 2.84 μm/min. the movem ... | 1987 | 28305388 |
| histological and histochemical studies on the ovaries of the red cotton bug, dysdercus koenigii (heteroptera: pyrrhocoridae). | a histological and histochemical study of the ovary of dysdercus koenigii has been carried out to ascertain the origin of protein, lipid and carbohydrate components of the yolk during vitellogenesis. germaria of the telotrophic ovarioles of this insect comprise mononucleate and binucleate trophocytes, prefollicular cells and oogonia ensheathed in two membranes. the follicular epithelium derived from the prefollicular cells is multilayered in the beginning of the oocyte development but is progres ... | 1981 | 7199790 |
| effect of apholate on neurosecretion of pars intercerebralis, fat bodies & ovarian development of the red cotton bug dysdercus koenigii (f). | | 1979 | 157974 |
| histological changes in the ovaries of dysdercus cingulatus (f.) caused by the "paper factor". | the histological changes in the ovarioles of the red cotton bug following treatment with "paper factor" to the adults are discussed. the changes in the shape of egg, resorption of the yolk and the formation of compound chambers with double nuclei were probably caused through deformation either in the germarium or follicular epithelial cells. | 1978 | 751342 |
| histo-physiology of the salivary glands of the red cotton bug, dysdercus koenigii (pyrrhocoridae-heteroptera)--histological, histochemical, autoradiographic and electron-microscopic studies. | 1. gross morphology, histology, histochemistry and ultrastructure of the salivary glands of dysdercus koenigii have been studied. the mode of origin of saliva was investigated by tracer techniques. 2. differences in histological structure of the glandular lobules, consistency and staining properties of the lumen contents, as also in their capability to incorporate materials from haemolymph have been observed, pointing to a possible division of labour among the different parts of the gland. 3. 3h ... | 1978 | 749375 |
| effect of chemosterilants on immature stages of red cotton bug dysdercus cingulatus f. | | 1975 | 1218917 |
| changes in the mineral content of the red cotton bug, dysdercus cingulatus f. due to treatments with oxytetracycline (terramycin) and sulphanilamide. | | 2013 | 1236087 |
| biology of treatia indica krantz and khot (acarina: phytoseiidae), a mite parasite of the red-cotton bug in india. | | 1975 | 1189875 |
| systemic activity of a juvenile hormone analog. | the peptidic analog of insect juvenile hormone, ethyl pivaloyl-l-alanyl-p-aminobenzoate with enormous biological activity on the red cotton bug, dysdercus cingulatus, has pronounced systemic effect in sunflower plants. the compound is absorbed by the plant tissues and appears to be translocated throughout the plant system in active form. there is some evidence that juvenile hormone analogs of other types also have similar systemic effects. the discovery of systemic action should aid in the possi ... | 1972 | 5008582 |
| blood protein concentration in relation to vitellogenesis in dysdercus cingulatus. | | 1971 | 5556439 |