نتایج جستجو برای: brevicoryne brassicae
تعداد نتایج: 1331 فیلتر نتایج به سال:
ترجیح غذایی دشمنان طبیعی یکی از پدیدهه ایی است که در بررسی کارایی و انتخاب دشمنان طبیعی باید مورد توجه قرار گیرد. زمانی که به یک شکارگر حق انتخاب بین دو یا چند گونه داده می شود، اغلب یکی از آن گونه ها را به دیگری ترجیح میدهد. دو گونه شته linnaeus brevicoryne brassicae و lipaphis erysimi kaltenbach از شته های مهم در مزارع کلزا هستند که می توانند به این گیاه خسارت وارد کنند. کفشدوزک geoz...
The glossy cauliflower PI 234599 has been used in breeding programs as a source of resistance to diamondback moth, Plutella xylostella (L.), and other lepidopterous larvae, but the relationship between insect resistance and glossiness has not been clear. One way to clarify this relationship is to find glossy lines carrying different genes for glossiness and test their resistance to insects. In ...
The use of chemical insecticides in the control of insect pests has left in its wake resistance of some pests to some of the conventional insecticides. Alternative methods of managing pests such as cultural control have to be employed to reduce pest infestation of crops. Onion was used in an intercrop as a non host crop to manage the pests of cabbage. The experiment was conducted in a Randomize...
The hypothesis that plants supplied with organic fertilizers are better defended against insect herbivores than those supplied with synthetic fertilizers was tested over two field seasons. Organic and synthetic fertilizer treatments at two nitrogen concentrations were supplied to Brassica plants, and their effects on the abundance of herbivore species and plant chemistry were assessed. The orga...
Inoculation of the semi-persistent cauliflower mosaic virus (CaMV, genus Caulimovirus) is associated with successive brief (5-10 s) intracellular stylet punctures (pd) when aphids probe in epidermal and mesophyll cells. In contrast to non-persistent viruses, there is no evidence for which of the pd subphases (II-1, II-2 and II-3) is involved in the inoculation of CaMV. Experiments were conducte...
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