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Bt-cotton characters & metrological factors effects on Jassid attack


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Год выпуска: 2011
Автор: Hafeez-ur- Rahman,M. Ahsan Khan and Mirza Abdul Qayyum
Издательство: LAP Lambert Academic Publishing
Страниц: 96
ISBN: 9783846531181
Описание
 Amongst various species of insect pests attacking the cotton crop, the sucking insect pests always remained a limiting factor. Among these sucking insects Jassid (Amrasca devastans Dist.) has great importance. Jassid is a very serious sucking pest of cotton which causes serious and significant yield reduction in susceptible cotton varieties. There a lot of research is carried out on the Physico-morphic characters and their effect on the sucking insect pests of non Bt-varieties but on the Bt-varieties there is no such type of research is carried out up till now. So it is needed that to carry out the research on the Bt-varieties. The present study will be conducted to know the resistance against Jassid in 10 available Bt-cotton varieties with the objective to know responses of these varieties towards the attack of this sucking insect pest. Physico-morphological characters like hair density, hair length and width of leaf lamina and number of gossypol glands of the plant leaves and along...

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