To develop a low-cost and high performance plowbreast, advanced computer modeling and finite element structure analysis were used as virtual prototyping tools for the opti.
经过一段时间的田间实验后,发现该犁犁胸上的犁胫部位磨损较快,严重影响了整个摆式犁的工作效率。
Effects of Transgenic Bt Rice on the Population Development of Nephotettix cincticeps;
转Bt基因水稻克螟稻对黑尾叶蝉种群增长的影响
t The impacts of two Bt transgenic rice lines TT9-3 and TT9-4 both of them contain a heterozygous gene of crylAb + crylAc from Bacillus thuringiensis, on the field population dynamics of Sogatella furcifera and Nephotettix cincticeps, as well as dominant spider species were evaluated.
结果表明,Bt稻与亲本对照(IR72)田间白背飞虱和黑尾叶蝉成虫的虫口密度在整个水稻生育期间无显著差异,而若虫密度有一定的不同。
The virus is transmitted by Nephotettix cincticeps in a circulative, persistent manner.
该病毒可由黑尾叶蝉(Nephotettix cincticeps)作为昆虫介体,它是一种经卵以持久方式传播的病毒。