The sensitivity of a susceptible and two resistant strains of cotton bollworm, Helicoverpa armigera, to phoxim, malathion and methomyl was determined by a topic
One pair of near isonegic yellow/black seeded rape (Brassica napus L) were used as experimental materials to study the changes of lignin contents and enzymes ac
It has been previously established that the BT type of cytoplasmic male sterility (CMS) is induced by high temperatures,while photosensitive genic male sterilit