نتایج جستجو برای: insects
تعداد نتایج: 27691 فیلتر نتایج به سال:
in laboratory experiments the toxicity of acetone was investigated against four species of stored-product insects. in empty-space trials, estimates of the lethal concentrations of acetone (lc, 72-h exposure) for 50% mortality against adults of the lesser grain borer, rhizopertha dominica (f.), red flour beetle, tribolium castaneum (herbst), rice weevil, si-tophilus oryzae (l.) and eggs of the a...
An investigation on the insects in the jujube ecosystem in Taigu District of Shanxi Province, Northern China showed that more species and individual numbers of pest, predatory and neutral insects were found on the tree than on the ground. The ratio of the species and individual numbers of predatory and neutral insects to those of pest insects fluctuated from year to year. Homoptera, Coleoptera ...
Infestation of grain by insects is widely controlled by the use of insecticides. Use of contact insecticides results in chemical residues left in the food which may have adverse effects on humans. Also insects develop resistance to both contact insecticides and fumigants. Microwave disinfestation offers an alternate way to disinfest grain. Microwaves are electromagnetic waves with frequencies r...
Nonindigenous forest insects and pathogens affect a range of ecosystems, industries, and property owners in the United States. Evaluating temporal patterns in the accumulation of these nonindigenous forest pests can inform regulatory and policy decisions. We compiled a comprehensive species list to assess the accumulation rates of nonindigenous forest insects and pathogens established in the Un...
The Department of Cybernetics has recently developed some simple robot insects which can move around an environment which they perceive through simple sensors. Suitable behaviour can be programmed into these devices by humans so that, for example, the insects can avoid obstacles. This paper describes these insects and a novel method which has been developed which allows the insects to learn the...
The caterpillar fungus Ophiocordyceps sinensis is one of the most valuable medicinal fungi in the world, and it requires host insects in family Hepialidae (Lepidoptera) to complete its life cycle. However, the genetic diversity and phylogeographic structures of the host insects remain to be explored. We analyzed the genetic diversity and temporal and spatial distribution patterns of genetic var...
Beetles (Coleoptera) are the largest order of insects, which exist in all agroecosystems and natural ecosystems. Since rice fields include both aquatic and subterranean ecosystems, diverse fauna of beetles are active in rice fields of the world. In regard to the importance of these insects in chain foods of biosphere, fauna of some coleopteran families was surveyed in north rice fields of Iran ...
Introduction: Fleas are small, blood-sucking insects that can transmit some pathogens to human and animals. Case Report: This paper presents a 21-year-old woman with severe skin reactions in her right forearm. After initial examinations, the symptoms were recognized as skin reaction caused by the bite of some human blood-sucking insects. Finally, after 15 days of flea bites, the symptoms wer...
In an investigation of the effects of the effluent of fish farms on the water quality of the Marbor River in Isfahan province based on biological indicators, some cases of infection of macrobenthos with horsehair worms (Nematomorpha: Gordiidae) were observed. About 76% of the observed worms were observed to leave their hosts. the horsehair worms were identified in only three families of aquatic...
"Increasing academic interest in edible insects: the Journal of Insects as Food and Feed." Feed, 9(1), pp. 1–2
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید