نتایج جستجو برای: the green peach aphid

تعداد نتایج: 16085181  

Journal: :Arthropod Management Tests 2003

2017
Aleksandra Losvik Lisa Beste Sara Mehrabi Lisbeth Jonsson

Aphids are phloem feeders that cause large damage globally as pest insects. They induce a variety of responses in the host plant, but not much is known about which responses are promoting or inhibiting aphid performance. Here, we investigated whether one of the responses induced in barley by the cereal aphid, bird cherry-oat aphid (Rhopalosiphum padi L.) affects aphid performance in the model p...

Journal: :Arthropod Management Tests 2000

Journal: :Arthropod Management Tests 1998

2017
Aleksandra Losvik Lisa Beste Robert Glinwood Emelie Ivarson Jennifer Stephens Li-Hua Zhu Lisbeth Jonsson

Aphids are pests on many crops and depend on plant phloem sap as their food source. In an attempt to find factors improving plant resistance against aphids, we studied the effects of overexpression and down-regulation of the lipoxygenase gene LOX2.2 in barley (Hordeum vulgare L.) on the performance of two aphid species. A specialist, bird cherry-oat aphid (Rhopalosiphum padi L.) and a generalis...

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