Feeding of this and other species of dysdercus on cotton bolls causes the boll to abort and shed pomeroy and golding, 1923 see economic impact. Studies on the biology and life cycle of dysdercus. The hiding behaviour of this predator, which is one of the key factors of predation success, was. Insecticidal action of the polyphenolic rich fractions from the stem bark of streblus asper on dysdercus cingulatus. The males are relatively smaller with conspicuous connexival spines and possess distinct external genitalia. Pdf artificial rearing of the red cotton bug, dysdercus cingulatus. Journal of advanced laboratory research in biology, 10 3, 5264. Endocrine influence on protein synthesis in the fatbodies. Dysdercus is a widespread genus of true bugs in the family pyrrhocoridae, commonly referred. Rhodnius prolixus, dysdercus peruvianus and others dysdercus maurus was evaluated 5. Both adults and nymphs feed on developing fruits and affect the crop.
The journal covers all branches of pureapplied science and technology such as physics, chemistry, life sciences, medicine, earth sciences, engineering and technology. Antilochus coquebertii fabr is an important predator of the red cotton stainer dysdercus koenigii in agricultural crops. Endocrine influence on protein synthesis in the fatbodies of. Sexual conflicts signaled by coercive mating, female resistance, and precopulation fights illustrate the mating system. Nymphicidal and ovipositional efficacy of seaweed sargassum tenerrimum j. Dysdercus cingulatus reproduced successively on various malvaceous and bombacaceous plant species, according to their. Title chemical sterilization of dysdercus cingulatus fabr. It is closely related and very similar to dysdercus koenigii but d. Efficacy of fungal entomopathogens against red cotton stainer, dysdercus cingulatus fabricius hemiptera. Pyrrhocoridae by the specialist predator antilochus coqueberti heteroptera. These symptoms and the delay in development are characteristic of.
Dysdercus cingulatus is a species of true bug in the family pyrrhocoridae, commonly known as the red cotton stainer. Protein and free amino acid concentration in the blood and total ovarian proteins in dysdercus cingulatus fabr. They can be readily distinguished from most other genera of pyrrhocoridae by the strong white markings at the. Consequently, the lint is stained with the crushed nymphs and deposited excreta, which negatively impacts its market value. Identification of pbanlike immunoreactivity in the neuroendocrine system and midgut of dysdercus cingulatus heteroptera. The gisd over the past two years and has been redesigned with support from the.
It damages the crop plant by sucking the sap from leaves and the developing fruits. It has been found to be a suitable host plant for the insect dysdercus cingulatus, which is a serious pest of cotton crops. Insecticidal activity of methanol and ethyl acetate leaves extract of chrysanthemum indicum were studied against dysdercus cingulatus. This study examined the flooding of dysdercus cingulatus eggs with seawater alone and in. Siddiqu supervisor a dissertation submitted in partial fulfilment of the requirements for the degree of master of philosophy in biochemistry in the faculty of science of the aligarh muslim university.
The male and female of dysdercus cingulatus showed its characteristics eags response to okra extracts and to four common. Lc 50, lc 90 chisquare value and percentage of mortality caused by beauveria bassiana bb08 against dysdercus cingulatus time 90 days lc 50 spore ml1 lc spore ml1 chi square mortality. Transactions of the royal entomological society of london, 988. Three artificial diets were prepared from the essential. Studies on the interaction of predatory insect and. Insecticidal action of the polyphenolic rich fractions.
Pyrrhocoridae katsuyuki kohno 1, ngan bui thi 1 1 okinawa subtropical station, japan international research center for agricultural sciences. Pyrrhocoridae in relation to growth, metamorphosis, and reproduction. Dysdercus maurus distant, the cottonstainer, is a very important agricultural pest in tropical regions brisolla et al 1992. The reduviidrhinocoris marginatus fabr, has been reported as a predator of the cotton stainer dysdercus cingulatus ambrose, 1985. General information about dysdercus cingulatus dysdci. Pdf biology of red cotton bug, dysdercus cingulatus semantic. They are often confused with bugs in the family lygaeidae, but can be distinguished by the lack of ocelli on the head. Bioefficacy of rhynocoris longifrons stal heteroptera. Paper factor as an inhibitor of the metamorphosis of the red cotton bug, dysdercus koenigii f. Introduction among the different pests of cotton the cotton strainer dysdercus sp. Insecticidal activity of piper tuberculatum extracts on the.
Dysdercus a genus of slender longlegged bugs that feed on the developing seeds of cotton and stain it genus dysdercus arthropod genus a genus. Seawater impact, red cotton bug, dysdercus cingulatus. Cotton stainer, dysdercus koenigii, dusky cotton bug, stink bug, warts, indentations, lesions, internal carpel wall, cotton. Extirpation of pars intercerebralis neurosecretory cells pinsc of femaled. Nymphs are red coloured with black median dorsal spots on the intertergal membrane of 34, 45 and 56 abdominal segments. Predatorprey ratios of macroinvertebrates in wheat and sugarcane agroecosystems muhammad nadeem abbas1, razia iqbal1, majid hussain1, saima kausar2 and rukhshanda saleem1 1department of zoology, university of gujrat, hafiz hayat campus, gujrat, pakistan 2department of zoology and fisheries, university of agriculture, faisalabad.
Studies on trehalase of dysdercus cingulatus by department of chemistry biochemistry division aligarh muslim university aligarh date approved. Abstract the primary objective of this work was to identify, under laboratory conditions, the route of infection and hemogram of dysdercus cingulatus fab. Xaviers college, palayankottai 627 002, india abstract the present work elucidates the functlonal response of the reduvud predator rhinocoris marginatus fabricius on the prey. This file is licensed under the creative commons attribution 3. Indian cotton stainer dysdercus cingulatus inaturalist. Insecticidal activity of piper tuberculatum extracts on. After emerging as adults both sexes show almost parallel changes in phospholipid levels in the fat body and gonads up to ten days, which include two reproductive.
Proteins and free amino acids in the blood in both sexes of the bug dysdercus cingulatus fluctuated during the first gonotrophic cycle which extended over 7 days. Electrophoretic analysis of haemolymph during various developmental stages showed the jhe bands. The bugs during the present studies were obtained from a normal strain of d. Media in category dysdercus cingulatus the following 22 files are in this category, out of 22 total. Phospholipid concentration in the fat body and gonads of. Dysdercus synonyms, dysdercus pronunciation, dysdercus translation, english dictionary definition of dysdercus. Proteins and free amino acids in the blood in both sexes of the bug dysdercus cingulatus fluctuated during. The predator may respond to the increased prey density by increasing their own numbers. Dysdercus is a widespread genus of true bugs in the family pyrrhocoridae, commonly referred to as cotton stainers or red cotton bugs. Dysdercus cingulatusfabricius red cotton stainer bug.
The red cotton bug, dysdercus cingulatus fab is an important pest damaging okra in india. Effects of host plant species on the development of. Both the adult and nymph feed gregariously on the leaves and green bolls of cotton. Reduviidae is a generalist predator of many cotton insect pests.
Short communication juvenomimetic activity of extracts of. Pyrrhocoridae is a serious pest, which feeds on developing cotton bolls, squares and ripe cotton seeds, and transmit fungi that develop on the immature lint and seeds. All structured data from the file and property namespaces is available under the creative commons cc0 license. Description of reproductive system of indian water scorpion, laccotrephes maculatus fabr. Pyrrhocoridae hemiptera lint stainers eggs are laid in moist soil or in crevices in the ground. Molecular mechanism underlying the entomotoxic effect of. Both adult and nymphal instars reduce the fruit quality and crop yield. Dysdercus cingulatus reproduced successively on various malvaceous and bombacaceous.
Determination of thermal constant and development threshold. A revision of the genus dysdercus boisduval hemiptera. Protein and free amino acid concentration in the blood and. Materials composed of american paperpulp have been shown to contain an extractable, heatstable lipid which exhibits high juvenile hormone activity when topically applied or otherwise brought. Insecticidal activity of chrysanthemum indicum against red. Description of reproductive system of indian water. Dysdercus cingulatus, red cotton bug rcb, has also shown significant susceptibility to cea intoxication. This species is responsible for losses of seed weight, seed oil content and for several cotton ball damages produced by bacterial and fungal opportunistic attacks in many malvaceae species almeida et al 1986. Files are available under licenses specified on their description page. Phospholipid concentration in the fat body and gonads of red.
You may do so in any reasonable manner, but not in any. Dysdercus cingulatus dysdcioverview eppo global database. The red cotton bug dysdercus cingulatus is a sap sucking hemipteran pest that causes considerable yield loss by feeding on the tender leaf and cotton seeds. In dysdercus cingulatus the phospholipid concentration in the fat body of the fifth instar nymphs rises after moulting and reaches to a peak level in the intermoult period. Sahayaraj and others published ecology of dysdercus cingulatus fab. An attempt was, therefore, made to evaluate the efficiency of apholate, tepa and metepa as the chemosterilants for d.
Pdf differential electroantennogram response of male and. Dysdercus cingulatus grows to a length of 12 to 18 mm 0. Provisional embryonic cuticles of dysdercus cingulatus. In this insect two provisional embryonic cuticles are successively secreted before the definitive cuticle is produced. The plant leaves were dried, powdered and extracted in soxhlet apparatus in methanol and ethyl acetate solvent for 24 hrs. It is a serious pest of cotton crops, the adults and older nymphs feeding on the emerging bolls and the cotton seeds as they mature, transmitting cottonstaining fungi as they do so. Males are found in may and june, females mainly between may and july, but occasionally persisting into the autumn. Dysdercus cingulatus fabricius 1775, an economically important insect pest infesting most of the malvaceae plants, has been utilized. It is mainly red but has a white collar and three black spots. Effects of host plant species on the development of dysdercus. Pyrrhocoridae katsuyuki kohno 1, ngan bui thi 1 1 okinawa subtropical station, japan international research center for agricultural sciences released 20040525. Efficacy of fungal entomopathogens against red cotton.
However, the molecular basis behind such entomotoxicity of cea has not been addressed adequately. In view of this, less hazardous options such as use of resistant cultivars, behaviour modifiers and insect growth regulators have gained prominence in. Colocasia esculenta tuber agglutinin cea, a mannose binding lectin, exhibits insecticidal efficacy against different hemipteran pests. Dysdercus koenigii fabricius, also known as red cotton bug, is one of the major pests of okra in india. Description of reproductive system of indian water scorpion. Mar 14, 2020 acta biologica indica download pdf file efficacy studies of. Efficacy of fungal entomopathogens against red cotton stainer. Defensive secretions of nymphs and adults of five species of. Annona montana annonaceae, were evaluated for theironcopelus fasciatus and dysdercus peruvianus 36. Zoologische verhandelingen, 97 abstract and pdf freeman, p. Paper factor as an inhibitor of the metamorphosis of the. Insecticidal action of the polyphenolic rich fractions from. This study analyses the role of body size and symmetry in the sexual selection and courtship behavior of dysdercus maurus distant. Phospholipid concentration in the fat body and gonads of red cotton bug, dysdercus cingulatus fabr.
It is a serious pest of cotton crops, the adults and older nymphs feeding on the emerging bolls and the cotton seeds as they mature, transmitting cotton staining fungi as they do so. Body size, symmetry and courtship behavior of dysdercus. The male reproductive organs include a pair of testis, a pair of vasa deferentia, a pair of vesicula seminalis, two pairs of accessory glands and unpaired median ductus ejaculatorious. Current science is a fortnightly journal published since 1932 by the current science association, bangalore india in collaboration with the indian academy of sciences. These fluctuations, which were more apparent in the female, were more or less parallel in both sexes. Although synthetic chemical insecticides can control it, the side effects are enormous. Different chemical compounds were identified from okra plant by gas chromatographymass spectrometer gcms techniques. Dysdercus definition of dysdercus by the free dictionary. It is a serious pest of cotton crops, the adults and older nymphs feeding on the emerging bolls and the cotton seeds as they mature, transmitting cotton.
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