SOME ASPECTS OF THE NUTRITIONAL AND CHEMICAL CONTROL OF TRIBOLIUM CASTANEUM (HERBST) (COLEOPTERA : TENEBRIONIDAE)
The present investigation deals with the effects of cereal flours (wheat, barley and rice) on the red flour beetle, Tribolium castaneum (Herbst). It was found that cereal flours had significant effects on the growth of T. castaneum producing lighter 10-day old larvae and the heaviest male mature larvae on rice flour. Cereal flour produced heavier pupae and rice flour produced the heaviest male adults and barley flour produced the heaviest female adults in comparison to controls grown on the wheat – yeast medium.
Continue reading NUTRITIONAL AND CHEMICAL CONTROL OF TRIBOLIUM CASTANEUM (HERBST)
A SURVEY OF MALLOPHAGA (INSECTA: PHTHIRAPTERA) OF DOMESTIC CHICKENS (GALLUS DOMESTICA L.) IN NAOGAON DISTRICT, BANGLADESH
To study the species variety and prevalence of the Mallophaga (Insecta: Phthiraptera) of the domestic chicken (Gallus domestica L.), a survey was performed in four upazilas (Manda, Mahdevpur, Atrai and Badalgachhi) of Naogaon district in a period of 10 month from Jun 2011 to March 2012. A study total 130 poultry farms and houses of Naogaon. Biting louse infestation was 100%. A total of 10762 individuals of Mallophaga were collected and identified. Five species of lice were identified: Menopon gallinae (line, 1758), Menacanthus stramineus (Mitzsch, 1818), Lipeurus caponis (Linne, 1758), Goniocotes gallinae (De Geer 1778) and Goniodes dissimilis (Denny, 1842). The occurrence of these lice on poultry birds was – Menopon gallinae (42.94%), Menacanthus stramineus (28.52%), Lipeurus caponis (10.77%), Goniocotes gallinae (14.72%) and Goniodes dissimilis(3.05%). Among them M. gallinae was the most common and G. dissimis was the lowest share of occurrence. The density of each proven species of Mallophaga was established. The species variety of Mallophaga on chickens was relatively poor. According to the literature, there is no record of G. dissimilis in Bangladesh which has identified during this research work.
Effect of Diflubenzuron and Diflubenzuron in Combination with Neem Oil on the Life Stages and Developmental Periods of Rice Weevil, Sitophilus oryzae (L.)
Effect of diflubenzuron (DFB) and diflubenzuron in combination with neem oil (NO) on the life stages and developmental periods of rice weevil, Sitophilus oryzae (L.) was studied. The fresh polished rice and egg, larva and pupa infested rice were treated with DFB and DFB-NO at four different doses viz. 2-, 4-, 8- and 16 mg/kg and 2+2.25-, 4+2.25-, 8+2.25- and 16 mg/kg+2.25ml/kg, respectively.
Continue reading Control of Rice weevil,Sitophilus oryzae (L.)
written by jakir zoology, RU
Ramshagar dighi not an actually sea, but also it’s a big pond known as Ramshagor dhighi. Ramshagar dighi is the largest man made pond (Dighi, Bengali meaning) sited at Tajpur village in Dinajpur. Ramshagar dighi is only 8 km south from Dinajpur Town. It bears some exceptional historical events of national heritage. Ramshagar dighi was excavated by Raja Ram Nath, who dug it in time of the eve of battle of Palashi. Raja Ram Nath begun to dig out the Tank or Dhighi on the basis of ‘Food for Work’ system. About 1.5 millions of labors work in there to excavate the biggest pond of Bangladesh. Ram Nath spends an amount of Taka 30,000 in his time. Most of the historians believe that Ramshagar dighi was created during the 1750 to 1755 AD.
Continue reading Ramsagor is not sagor(sea).
The study was conducted to collect and identify the ectoparasites and endoparasites of Channa punctatus (Bloch, 1793) from different water bodies of Rajshahi district during June 2011 to April 2012. Samples were collected from different fish markets and in some cases directly from fishermen of Rajshahi city. A total of 373 fishes were examined during the study period of which 251 fishes (67.29%) were infected. Organ wise distribution, monthly, seasonally, sex and length groups wise fluctuation of prevalence, abundance and mean intensity of parasites were studied. A total of 8 different parasitic genera were collected from the host fishes. Among them 5 were ectoparasites and 3 were endoparasites. Of these five ectoparasites one was protozoan Trichodina pediculatus, and two monogenic parasites Dactylogyrus vastator and Gyrodactylus elegans, one annelid was Hirudu medicenalis and one crustacean Argulus foliaceus. Three endoparasites were Ascaridia sp. nematodes one trematodes Genarchopsis sp and acanthocephalan pallisentis sp. Highest parasitic infestations were found in intestine, second highest was found in gill and the lowest was found in skin and stomach. Parasitic infestation fluctuated from months to months. Highest parasitic infestation was found in November and the lowest in June. The host fishes showed highest prevalence value and highest abundance value in autumn season. The host fishes showed their lowest prevalence and abundance value in winter season. Parasitic infestation was found to vary with size groups and sex groups. It was noted that the hosts of intermediate length and weight groups were found to be more infected than smaller and larger length group. Females were more infested than the males.