The experiment was conducted to find out the efficacy of dodder vine extract as seed protectant against pulse beetle, Callosobruchus chinensis on gram seed in the laboratory of the Department of Entomology, Bangladesh Agricultural University, Mymensingh during the period of February to May, 2009. The concentrations of dodder vine extract were 5, 2 and 1% respectively. Efficacies of these treatm...

The eclosion and oviposition rhythms of flies from a population of Drosophila melanogaster maintained under constant conditions of the laboratory were assayed under constant light (LL), constant darkness (DD), and light/dark (LD) cycles of 10:10h (T20), 12:12h (T24), and 14:14h (T28). The mean (+/- 95% confidence interval; CI) free-running period (tau) of the oviposition rhythm was 26.34 +/- 1....

We tested the oviposition response of Culex mosquitoes to the predator Notonecta irrorata in an outdoor artificial pool experiment employing equal numbers of control and predator pools. There was a strong oviposition avoidance by Culex of Notonecta pools; 83% of egg rafts were found in control pools during the period in which Notonecta were present. After removing Notonecta, mosquitoes continue...

The life cycle of Rhipicephalus evertsi evertsi Neumann, 1897, is discussed under the following headings: larval feeding; larval drop; nymphal feeding; nymphal drop; nymphal moulting; adult feeding; adult drop; preoviposition period; oviposition period and incubation. Special attention has also been given to the development of both male and female reproductive organs, gametogensis and mating.

Population interaction of Toxorhynchites splendens and Aedes aegypti in relation to the complexity of the breeding habitats and their initial number was studied in the laboratory. The predator and the prey were introduced in different ratios in the colony cages (1 m3) with different oviposition structures. Predator-prey interaction lasted for 5-9 weeks without structural complexity of the ovipo...

Biological aspects and demographic parameters of Cephalonomia stephanoderis Betrem (Hymenoptera: Bethylidae) and Prorops nasuta Waterston (Hymenoptera: Bethylidae) parasitoids of the coffee berry borer (CBB), Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae: Scolytinae) were investigated using diet-reared CBB hosts. Developmental time from eggs to adults, oviposition, and postovipositio...

Mating and oviposition behaviour of brinjal shoot fruit borer (BSFB), Leucinodes orbonalis Guenee (Lepidoptera:Pyralidae) were carried out in the laboratory on plants maintaining temperature (20-250C) relative humidity (80-85%). The moths found active at night for mating oviposition. usually occurred late but a few to continue up 8.0 hour day. Maximum completed between 4.00 6.00 period ranged f...

The purpose of this study was to develop age-specific survivorship and fecundity schedules for adult Plodia interpunctella (Hübner) relevant to maize storages, with special reference to the southeastern states (USA). Laboratory cultures were established with moths collected from farm-stored maize in South Carolina and maintained on cracked maize at 30 1C and 60% r.h. Age-specific schedules of s...

The experiment on biology of fruit borer Helicoverpa armigera (Hubner) was carried out in the Bio-control Laboratory, Department Entomology, S.V.P.U.A.&T., Meerut. Results showed that mean pre-oviposition, oviposition and post-oviposition period tomato lasted for 2.46 ± 0.29, 6.33 0.14 1.67 days, respectively. A female laid an average 329.40 68.17 eggs. incubation observed to be 3.08 0.32 d...