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Rearing and Identification of Callosobruchus Maculatus Journal of Entomology and Zoology Studies 2016; 4(2): 264-266 E-ISSN: 2320-7078 P-ISSN: 2349-6800 Rearing and identification of Callosobruchus maculatus JEZS 2016; 4(2): 264-266 (Bruchidae: Coleoptera) in Chickpea © 2016 JEZS Received: 21-01-2016 Accepted: 23-02-2016 Fatima, Maqsood Shah, Amjad Usman, Kamran Sohail, Muhammad Afzaal, Bismillah Shah, Muhammad Adnan, Nazeer Ahmed, Khwaja Junaid, Fatima Department of Entomology, Syed Rizwan Ali Shah, Inayat-ur-Rahman The University of Agriculture, Peshawar-Pakistan. Abstract To study the rearing and identification of Callosobruchus maculates (Bruchidae: Coleoptera) in Maqsood Shah chickpea, the present research work was carried out at the Entomology Research Laboratory of The Department of Entomology, University of Agriculture, Peshawar, during 2014. C. maculatus, (Bruchidae; Coleoptera) is an important The University of Agriculture, Peshawar-Pakistan. stored grain insect pest distributed in Asia and Africa, ranging from tropical to subtropical world. It has been reported that the favorite hosts for C. maculatus are cowpea and chickpea but it also feed on other Amjad Usman legumes as well. Grains were collected from various godowns of village Maneri (Swabi) and were Department of Entomology, brought to the Research Laboratory of The University of Agriculture Peshawar. Grains were kept in jars The University of Agriculture, at 28±2 ºC and 65±5% Relative humidity (RH) and covered with muslin cloth in order to supply adequate Peshawar-Pakistan. humidity to the grains. To establish the stock culture of C.maculatus chickpea was used as a host. Grains of Chickpea were kept in the jars and the jars were covered with muslin cloth and placed at 28.5 ºC and Kamran Sohail 67.25 RH. The parasitoid from the culture of C.maculatus was collected with the help of aspirator and Department of Entomology, was then preserved in 70% alcohol. The parasitoid was identified with the help of literature and The University of Agriculture, specimens present in the Insect museum of the Department of Entomology, The University of Peshawar-Pakistan. Agriculture, Peshawar. Both the pest and the collected parasitoid were properly mounted and labeled for Muhammad Afzaal demonstration purposes and were then deposited in the Insect museum of the Department of Entomology, Department of Entomology, The University of Agriculture, Peshawar. The University of Agriculture, Peshawar-Pakistan. Keywords: Callosobruchus maculatus, chickpea, legumes, stock culture, aspirator and parasitoid. Bismillah Shah 1. Introduction Department of Entomology, Pests are a major problem both in the field and store houses. They cause losses of more than The University of Agriculture, [1] Peshawar-Pakistan. half of the expected yield . Presently, pest control measures in storage rely on the use of [2] synthetic insecticides and fumigants, which is the quickest method of pest control . During Muhammad Adnan storage, food commodities are attacked by the number of insect pest like Sitophilus granarius, Department of Agriculture, Rhyzopertha dominica, Callosobruchus chinensis and Callosobruchus maculatus. Among University of Swabi-Pakistan. them, Callosobruchus maculatus, (Bruchidae; Coleoptera) is an important stored grain insect Nazeer Ahmed pest distributed in Asia and Africa, ranges from tropical to subtropical world. It has been State Key Laboratory of Crop reported that the favorite hosts for C. maculatus are cowpea and chickpea but it also feed on Stress Biology for Arid Areas, other legumes as well [3]. Bruchid attack of pulses initially begins in the field and rapidly Northwest A&F University, builds up during storage. Bruchid can cause an infestation from 60 to 100% during three to six Yangling, China. months storage. Life cycle of C. maculatus is typically adapted to development in mature Khwaja Junaid legume seeds. The larvae upon hatching enter into the cotyledons and spend the entire larval Department of Plant Protection, stage within the seeds. [4] As the larvae of these beetles are unable to migrate between seeds, the University of Agriculture, the oviposition behavior of the female parent is crucial in determining the survival prospect of Peshawar-Pakistan. [5] the progeny . Recent studies have documented sample evidence to suggest that natural Syed Rizwan Ali Shah selection has molded the oviposition behavior and related life history traits such as fecundity, Department of Plant Protection, adult production etc. of these insects in a way that maximizes the individual fitness. The larvae the University of Agriculture, of C. maculatus is totally dependent on the seed of legumes but the adults of this pest do not Peshawar-Pakistan. require water and feed but instead spend their limited life on mating and lying eggs. The eggs Inayat-ur-Rahman are being laid by an adult female on the surface of seed which are attached on its surface as if Department of Agriculture, glued on the surface of seed at 30-35ºC and 70-90% R.H, are considered as ideal conditions University of Swabi-Pakistan. for the oviposition and hatching takes place after 6 days of oviposition. Adults emerge within 3-4 weeks under favorable conditions [6]. C. maculatus males and females both have an Correspondence Muhammad Adnan average life time of 7 days under laboratory conditions and only few of them can survive more [7, 8] Department of Agriculture, than 2 weeks . Both male and female can mate soon after their emergence and both can University of Swabi-Pakistan. mate sever Times during their life time. ~ 264 ~ Journal of Entomology and Zoology Studies Oviposition rates are being adjusted by the females in order to in coloration and males are brown, but in others both sexes handle the changes in host availability and thus laying few are brown. eggs when host availability is low. Sometimes female continue laying eggs on unsuitable substrates during host dispossession [9, 10]. Biological control has not been widely used against Callosobruchus species, although natural populations of C. maculatus are often subject to high levels of parasitism, particularly in West Africa. Mass rearing techniques for parasitoids have been developed and procedures for control by inoculation of parasitoids have been suggested. The objective of this study is to identify the pest insects and their natural enemies occurring in the Chickpea collected from various godowns of Maneri (Swabi) and to rear the collected pests in the same host as to establish stock culture for future use. 2. Materials and Method Fig 1a Fig 1b The rearing of C. maculatus was carried out at the Entomology Research Laboratory of The University of 3.1 Morphological Description of Family Bruchidae Agriculture, Peshawar, during 2014. The members of Bruchidae family are granivores and typically infest various kinds of seeds or beans, living for 2.1 Collection of Grains most of their lives inside a single seed. The family includes Grains were collected from various godowns of village about 1,350 species found worldwide. Bean weevils are Maneri (Swabi) and were brought to the Research Laboratory generally compact and oval in shape, with small heads of The University of Agriculture Peshawar. Grains were kept somewhat bent under. Sizes range from 1 to 22 mm for some in jars at 28±2ºC and 65±5% Relative humidity (RH) and tropical species. Colors are usually black or brown, often with covered with muslin cloth in order to supply adequate mottled patterns. Although their mandibles may be elongated, humidity to the grains. The jars were examined after one they do not have the long snouts characteristic of true weevils. week for the insect infestation. The insects were collected Adults deposit eggs on seeds, then the larvae chew their way with the help of aspirator in a separate jar. into the seed. When ready to pupate, the larvae typically cut an exit hole, then return to their feeding chamber. Adult 2.2 Establishment of stock culture of C.maculatus weevils have a habit of feigning death and dropping from a To establish the stock culture of C.maculatus chickpea was plant when disturbed. used as a host. Grains of Chickpea were kept in the jars and were covered with muslin cloth and placed at 28.5ºC and 3.2 Differences among maculatus and other species of 67.25 RH. The culture was observed regularly for the genus Callosobruchus: presence of C.maculatus and any other insects, particularly C. maculatus predators and parasitoids. After one week of the establishment Inner carina of hind femur smooth; inner tooth typically as of stock culture an insect parasitoid was observed emerging long as, or very slightly longer than, outer tooth. Pronotum of from the infested grains. The parasitoid from the culture of mature specimens with black cuticle, and with golden setae, C.maculatus was collected with the help of aspirator and was except on the basal median gibbosities, which extend well then preserved in 70% alcohol. The parasitoid was identified beyond the posterior margin and are covered with white scale- with the help of literature and specimens present in the Insect like setae. Eyes very deeply emarginate, prominent and museum of the Department of Entomology, The University of bulbous. Male genitalia distinctive: median lobe with two Agriculture, Peshawar. The stock culture was maintained by longitudinal sclerotized denticulate areas near its middle; providing host and optimum laboratory conditions for further parameres rather stout and broadly spatulate. research studies. C. chinensis 2.3 Mounting Male antennae pectinate, segments 4-10 conspicuously Both the pest and the collected parasitoid were properly expanded antero-laterally; female antennae serrate; antennae mounted and labeled for demonstration purposes and were of both sexes usually with segments 4-l 1 dark brown (rarely then deposited in the Insect museum of the Department of yellow-brown). Pygidium of female (and male) covered with Entomology, The University of Agriculture, Peshawar. white or silver setae. Inner tooth of hind femur with sides more or less parallel, converging near apex.
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