Category Archives: Entomology

NUTRITIONAL AND CHEMICAL CONTROL OF TRIBOLIUM CASTANEUM (HERBST)

SOME ASPECTS OF THE NUTRITIONAL AND CHEMICAL CONTROL OF TRIBOLIUM CASTANEUM (HERBST) (COLEOPTERA : TENEBRIONIDAE)

ABSTRACT

Nutritional control

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.

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A SURVEY OF MALLOPHAGA OF DOMESTIC CHICKENS

A SURVEY OF MALLOPHAGA (INSECTA: PHTHIRAPTERA) OF DOMESTIC CHICKENS (GALLUS DOMESTICA L.) IN NAOGAON DISTRICT, BANGLADESH

Abstract

 

 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.

Control of Rice weevil,Sitophilus oryzae (L.)

Effect of Diflubenzuron and Diflubenzuron in Combination with Neem Oil on the Life Stages and Developmental Periods of Rice Weevil, Sitophilus oryzae (L.)

Abstract

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.

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DIVERSITY AND ABUNDANCE OF INSECT FAUNA IN RAJSHAHI UNIVERSITY CAMPUS

Abstracts

A research survey was conducted in the Rajshahi University Campus during the November, 2008 to May, 2009 to explore the faunal diversity of insects. Sweeping net, plastic containers, stretching board, insect pins, alcohol etc. were used for collecting, killing, stretching and preserving the insects. Altogether 500 insect specimens were collected in five months (November 2008, January 2009, February 2009, March 2009 and May 2009) under 12 Orders viz. Orthoptera, Coleoptera, Lepidoptera, Diptera, Hemiptera, Hymenoptera, Odonata, Ephemeroptera, Psocoptera, Isoptera, Mantoidea. Some undetermined orders were also found during the collection period. Order Diptera was found as most abundant (22.2±1.91) followed by the Coleoptera (17.22±4.55). Minimum abundance was recorded for Mantoidea (0.017±0.016) followed by Psocoptera (0.056±0.054). Among three different trapping spots, highest population of insect was trapped in second science building (6.53±2.94) and lowest population was in third science building (5.72±2.03) during November 2008 to May 2009. Highest number of insects was found in November 2008 (12.06±1.33) followed by February 2009 (5.17±1.19). The lowest population of insect was found in January 2009 (4.04±0.12). Collected specimens were preserved in the departmental insectarium’s.

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INTRODUCTION to FORAGING ACTIVITY OF THE EUROPEAN HONEY BEE, APIS MELLIFERA L. ON LITCHI FLOWER IN DIFFERENT HOURS OF THE DAY

INTRODUCTION

Flowering plants and honeybees have a special relationship in which both are benefited from each other. As honeybees get food and in turn facilitate their pollination process. Honeybees visit flowers to collect pollen and nectar. Pollens are the principle source of protein, fats, vitamins and minerals, which are essential for honeybee growth and development, repairing of worn out tissue and stimulating the development of     hypo-pharyngeal glands. Nectar is the carbohydrate compounds mainly sucrose, fructose and glucose portion of the honeybee’s food and is the raw material of honey (Jones and Yates, 1991).

During foraging activities, honeybees identify and differentiate among various flowers using odours and both intensity and odour quality effect the ability of honeybee to discriminate between floral perfumes (Pham-Delegue et al. 1986).

Honeybee forage by selecting flowers that have similar shape, colour and odor (Chittka et al., 1999).

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