BACKGROUND Anopheles gambiae s.s. Giles is a major malaria vector in Sub-Saharan Africa. Studies of the basic biology of this mosquito, including oviposition, provide a background for assessing which attributes might be exploited for suppressing A. gambiae populations. Here, we report on when during the diel cycle A. gambiae individuals deposit eggs as compared to the ovipositional patterns of ...

the ovipositiomil behaviour and success of anagyrus pseudococci (girault), an encyrtid endoparasitoid of mealybugs, planococcus citri (risso) and pseudococcus affinis (mask.) were studied in the laboratory. behavioural sequences during oviposition starting from the searching for the host to the post-oviposition activities were described. once encountered, the mealybug host was examined and ...

Longevity, duration of the oviposition period, realized fecundity, potential fecundity, and egg fertility of the beet armyworm, Spodoptera exigua (Hübner), were examined in the laboratory under three different adult diet regimes. All parameters were signiÞcantly reduced for the water-only diet compared with 10% honey or sucrose diets, except fertility, which could not be measured after 5 d beca...

Spodoptera littoralis, cotton leafworm is a destructive pest for several economic crops. The more use of chemical pesticide the increase this resistance, that lead to discovering new natural pesticides from plant extracts and oils. present search targeted suggest alternative components sources safety ecosystem had ability reduce insect prohibition. experimental results exhibited highly signific...

A yolk protein enzyme-linked immunosorbent assay (YP-ELISA) was developed for the predator Orius insidiosus (Say). The YP-ELISA is intended to assess reproductive response to dietary and other rearing conditions, and to assist in quality control and diet development for mass rearing. Hybridomas and monoclonal antibodies were produced against homogenates of eggs dissected from females. Hybridoma...

The number of egg rafts oviposited by Culex pipiens and Culex restuans in infusion-baited ovitraps varied with the type of infusion substrate, infusion age, method of infusion preparation, and calendar date. In one or more tests, more Culex egg rafts were collected from water infused with Kentucky bluegrass sod, mixed grass clippings, straw, or a commercial rabbit chow than from a water control...

This study investigates the potential effects of maternally derived hormones present in the yolk of reptile eggs. Specifically, we ask when are these hormones utilized by developing red-eared slider turtles (Trachemys scripta elegans), a species with temperature-dependent sex determination (TSD). Eggs were incubated at 27 degrees C, a male-producing temperature, and at 31 degrees C, a female-pr...

Predator-experienced individuals often change their predation avoidance response when they re-encounter the same predators or their cues. Recent reports show that behavioural change sometimes occurs even before the re-encounter. To function as an adaptive strategy in the wild, such prospective experience-induced behaviour should change flexibly in response to changing situations. We assessed fl...

In sexual conflict, males are often thought to gain fitness benefits from harassing females over mating. Yet when harassment itself incurs costs and if alternative, receptive available in a local population, theory predicts that confronted with female refusal, male’s choice of persisting or retreating is determined part by the likelihood achieving We tested prediction damselfly Enallagma hageni...

The aim of the study was to analyze the pattern of oviposition time in laying sequences in broiler breeder hens and to determine a relationship between egg position in the sequence and egg quality. The sequences were described using mean oviposition time (hour) within a sequence, mean lag of oviposition time between successive ovipositions, and mean and cumulative lag of oviposition for a seque...