نتایج جستجو برای: coccinella undecimpunctata
تعداد نتایج: 369 فیلتر نتایج به سال:
The coleopteran insect western corn rootworm (WCR, Diabrotica virgifera virgifera) is an economically important pest in North America and Europe. Transgenic corn plants producing Bacillus thuringiensis (Bt) insecticidal proteins have been useful against this devastating pest, but evolution of resistance has reduced their efficacy. Here, we report the discovery of a novel insecticidal protein, P...
Cucurbitacin E glycoside, extracted from a bitter mutant of Hawkesbury watermelon [Citrullus lanatus (Thunb.) Matsum. & Nakai (Syn. Citrullus vulgaris Schrad)] is the active ingredient of a feeding stimulant for the corn rootworm complex. It is the primary component of a water-soluble bait that can be combined with toxins for adult diabroticite control. Studies were conducted using phloxine B (...
Entomological collections are an invaluable source of data, due to the variety species they contain, capturing biodiversity a given time. Thus, entomology part Division Zoology Collection (Faculty Science, Department Biology), in Zagreb, established 1890, is important asset for all faunistic research and any overview historical changes composition, as well resource education young scientists. H...
The characteristic bitter substances of the Cucurbitaceae act as kairomones for a large group of diabroticite beetles (Chrysomelidae, Galerucinae, Luperini), promoting host selection and compulsive feeding behavior. These beetles (e.g., Diabrotica undecimpunctata howardi) respond to as little as 1 ng of cucurbitacin (Cuc) B on thin-layer plates by arrest and compulsive feeding. Six species of d...
Field studies were conducted in 1993 and 1994 to evaluate the effects of induced resistance in cucumber by plant growth-promoting rhizobacteria (PGPR) on numbers of the spotted cucumber beetle, Diabrotica undecimpunctata howardi Barber, and the striped cucumber beetle, Acalymma vittatum (F.). Cucumber plant growth and yields were significantly (P<0.05) greater, and populations of cucumber beetl...
The effects of food waste vermicompost on populations of adult striped cucumber beetles (Acalymma vittatum) and spotted cucumber beetles (Diabotrica undecimpunctata) on cucumbers and larval hornworms on tomatoes (Manduca quinquemaculata) were evaluated in both greenhouse and field experiments as well as damage caused. In the field, cucumber and tomato plants were grown, with two different appli...
Aggregation of conspecific predators sharing a common prey, influences their bodyweights. We investigated the influence intraspecific competition adult ladybirds Coccinella transversalis Fabricius on bodyweight feeding rusty plum aphid, Hysteroneura setariae (Thomas). Adult males and females consumed significantly greater number aphids with increase in predator-density, however, aphid-consumpti...
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