the prey suitability for generalist predators is an important feature for efficient mass rearing and ipm. the green lacewing, chrysoperla carnea (stephens) is a polyphagous predator attacking several pests on various crops. this experiment was conducted under laboratory conditions at 25 ± 2 °c, 60 ± 5% r. h. and a photoperiod of 16l: 8d h. the effects of different prey species were investigated...

The NI artificial diet is the only known successful diet for mass rearing the western tarnished plant bug, Lygus hesperus Knight (Hemiptera: Miridae). This diet has been used for more than a decade. However, because it contains cooked chicken egg, and thus requires laborious preparation (Cohen 2000), this diet is difficult to use. Three modifications (D1, D2, D3) of the NI diet were investigate...

We report the results of a study on potential food sources of the widely distributed Indo-Australian braconid fruit fly parasitoid Diachasmimorpha longicaudata (Ashmead) (Hymenoptera: Braconidae). Adults sustained life on diets of fruit juice or fruit pulp, a homopteran and its associated honeydew, or extrafloral nectary secretions. Longevities on all these foods and fecundity on fruit juice we...

Superparasitism, a strategy in which a female lays eggs in/on a previously parasitized host, was attributed in the past to the inability of females to discriminate between parasitized and non-parasitized hosts. However, superparasitism is now accepted as an adaptive strategy under specific conditions. In fruit fly parasitoids, superparasitism has mainly been studied as concerns the new associat...

Three-hour milk production measurements determined by machine milking at 3-d intervals throughout a 63-d lactation period were used to describe lactation curves for crossbred ewes lambing at 1 and 2 yr of age and rearing single and twin lambs. Age of ewe, type of rearing, and day of lactation affected (P < 0.05) milk production. Over the 63-d lactation, average daily milk production was 2.56 an...

1. GENERAL (INCLUDING LAND USE) 5816 Cattand, P., 1988. Sleeping sickness re-awakes. World Health, 1988 (July): 24-25. Trypanosomiases and Leishmaniases Unit, WHO, 1211 Geneva 27, Switzerland. An alarming increase in the number of sleeping sickness cases in many historically endemic areas, where previously good surveillance had reduced incidence to a very low level, demonstrates what can happen...

understanding of parameters that influence parasitoids fitness is necessary for mass rearing and effective use of parasitoids. host quality is an intrinsic feature that is determined by quantitative and qualitative differences in hosts. these differences can change nutritional resources available and consequently affect life history traits of parasitoid. in this study, parasitoid wasps lysiphle...

1. GENERAL (INCLUDING LAND USE) 5816 Cattand, P., 1988. Sleeping sickness re-awakes. World Health, 1988 (July): 24-25. Trypanosomiases and Leishmaniases Unit, WHO, 1211 Geneva 27, Switzerland. An alarming increase in the number of sleeping sickness cases in many historically endemic areas, where previously good surveillance had reduced incidence to a very low level, demonstrates what can happen...

A total of 1,257 gilts were used to determine the effect of space allowance during rearing and age at puberty on total pigs produced and removal rate over 3 parities. There were 2 treatments. In treatment 1, gilts were given a space allowance of 1.13 m(2)/gilt (15 gilts per pen), and in treatment 2, gilts were given 0.77 m(2)/gilt (22 gilts per pen). Gilts (38 kg and 75 d of age) were individua...