查询词典 Parasitica

The test results suggested that the metalaxyl-resistant strains of Phytophthora parasitica var. nicotianae had quite high level of fitness on their latent period, infection frequency, disease index and lesion area.

对甲霜灵敏感性不同的烟草黑胫病菌适合度测定结果表明，抗性菌株在潜伏期、侵染率、病情指数和病斑面积等方面均具有相当高的适合度水平。

To control tobacco black shank disease rationally, reduce resistance, 34 strains of Phytophthora parasitica var. nicotianae were isolated from 6 region of Yunnan province and all isolates were determined their resistance to metalaxyl. The results indicated that of all tested isolates, there were 12 high resistance, 5 middle resistance and 17 low resistance isolates respectively.

为合理防治烟草黑胫病，减少抗药性产生，从云南省6个地州分离烟草黑胫病菌菌株34个，就分离菌株对甲霜灵的抗药性进行了测定，结果表明，供试34个菌株中中高抗菌株12个，中抗菌株比例较高5个，低抗菌株17个。

In this study, genes encoding MAPK and MEK in P. parasitica, an important plant pathogen, were cloned by PCR using degenerate primers, followedby 5'- and 3'-RACE.

在本篇研究中，利用简并式引子对进行聚合酶连锁反应并配合RACE成功从疫病菌中选殖出4个MAPK以及5个MEK基因。

Cryphonectria parasitica, a dangerous forest pathogen, have been prevailing and causing great economic losses in the Chinese chestnut plantations in Kunming area since 2005.This disease mainly infects the trunk and big branches, and the highest mortality was observed during the period from April to June.

板栗疫病作为一种危险性的林木病害，目前已在昆明市的重点板栗种植区普遍发生，并于2005年以来开始形成大面积的暴发危害，相继在一些局部板栗产区造成了较为严重的灾害损失。

In order to evaluate resistance risk of Phytophthora parasitica var. nicotianae to metalaxyl, the metalaxyl-sensitive strain 240 and metalaxyl-resistant strain191 were studied. The results showed that the mutation rate of metalaxyl-sensitive strain 240 was 7.0×10–5 on CA medium with metalaxyl concentration of 10μg/mL.

为了评估烟草黑胫病菌对甲霜灵的抗药性风险，以对甲霜灵敏感和高抗的烟草黑胫病菌240和191为出发菌株，进行了抗性突变频率测定、抗性诱变、抗性水平测定、遗传稳定性、生长速率、致病性测定和适合度等研究。

From Chuxiong Shuangbai was the highest metalaxyl resistant isolate,and the lowest resistance isolate 218# come from Weishanof Dali. The EC50 of 34 Phytophthora parasitica var. nicotianae isolates against metalaxyl was 0.0148μg/ml in average, was in the range of 0~0.053μg/ml.

分离自楚雄双柏县雨龙乡的113#菌株抗药性最强，来自大理巍山县大仓镇的218#菌株抗药性最低。34株烟草黑胫病菌菌株对甲霜灵的EC50值平均为0.0148μg/ml，范围在0~0.053μg/ml。

The antibiotic 2507 has also satisfactory effect for controlling chinese cabbage downy mildew disease infected by Peronospora parasitica Fr. with efficacy 87.5% in field test.

结果表明，抗生素2507在温室人工接菌情况下，防治黄瓜疫病的效果可达95%以上，田间小区防治小白菜霜霉病的效果达到87.5%。

Using 11 primers filtrated from total 53 primers, ISSR amplification was conducted in 220 individuals from eleven Cryphonectria parasitica subpopulations which were from four countries, and 174 polymorphic loci were detected from total 177 loci. The percentage of polymorphic loci of the total populations was 98.31%, while that at a subpopulation level averaged 20.43 %. Shannon's Information index and Nei's gene diversity of the fungus at the total populations level was 0.1769 and 0.7386, respectively.

自53个ISSR引物中筛选出11个引物，对以上四个群体的栗疫病菌11个子群体的220个菌株进行扩增，共检测到177个位点，其中多态位点为174个，多态位点百分率为98.31%。11个栗疫病菌子群体的P平均值为20.43%；群体水平的Shannon信息指数和Nei指数分别为0.1769和0.7386；各个子群体I的平均值为0.0943，h的平均值为0.0614。

Harpin〓 can induce plant resistance to TMV and Phytophthora parasitica var. nicotianae.

水稻白叶枯病菌过敏性反应激发子harpin〓能够诱导Xanthi烟草抗TMV和烟草黑胫病的侵染。

Endophtic bacteria strains were isolated from healthy tobaccos from heavy disease plots in Yongzhou, Ningxiang and Liuyang. By Laboratory dual culture test, seventeen actinomycetes to Phytophthora parasitica var. nicotianae were screened.

同时在湖南永州、浏阳和宁乡等地发病重的田块采集健株共分离到内生细菌120株，经室内平皿对峙培养法测定，其中8株内生细菌菌株在室内有较强的拮抗作用。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。