三叶的

The thesis studies the pest acarids groups on apple trees in fruit areas such as YangLing, LiQuan, QianXian, FengXiang, MeiXian,and LuoChuan, Shaanxi Province, demonstrating that Tetranychus viennenis Zacher; Tetranychus urticae Koch and Panonychus ulmi Koch.are the key species, and comparing the morphology and biology of the three species of acarids.made the contrast with the modality and disserve habit of three kind harm acarids.

本文系统研究了陕西果区苹果害螨的种类，调查了杨凌、礼泉、乾县、凤翔、眉县、洛川等地区苹果树上的害螨种群，明确了陕西果区苹果害螨种类主要有三种：(1)山楂叶螨Tetranychus viennenis Zacher；(2)二斑叶螨Tetranychus urticae Koch；(3)苹果全爪螨Panonychus ulmi。

This paper presents for the first time information on the reproductive ecology of two dioecious fig species, mainly on their phenology, the reproductive behaviors of associated fig wasp s and ecology.

本文主要从榕树物候学、榕小蜂繁殖行为学和生态学三个方面展开对西双版纳热带雨林下的歪叶榕和假斜叶榕两种榕树的繁殖机制研究。

Prostrate, semi-prostrate and skewed, had different selection effects on rolled leaves percentage by bean pyralid, and the average selection values were -31.82%, 50.00% and 81.82% in TA population, and -37.09%, 14.87% and 103.21% in NTA population, respectively.

TA群体中匍匐型、半匍匐型和斜立型茸毛着生状态对卷叶率的平均选择效应分别为-31.82%、50.00%和81.82%，NTA群体中三种茸毛着生状态对卷叶率的平均选择效应分别为-37.09%、14.87%和103.21%。

The electrical signal of three species in compositae, namely, Senecio cruentus、Bellis perennis and Chrysanthemum coronarium grown in flowerpots, was determined and then analyzed by the method of short time Fourier transform.

对测得的瓜叶菊、雏菊和茼蒿三种盆栽菊科植物的电信号进行了短时傅立叶变换分析。

Softwood cuttings of Codiaeum variegatum var.pictum were treated with diffrent concentrations of solutions 1 (1％Triadimefon +15％Ethylicin WP) and 2 (15％Carbendazim + 15％Thiram WP)for 3 hours.

以琴叶变叶木（Codiaeum variegatum var 。pictum）为材料，用1%三唑酮+15%乙蒜素可湿性粉剂和15%多菌灵+15%福美双可湿性粉剂分别配制成不同浓度的系列溶液，对插穗浸泡处理3 h后扦插试验，研究这两种混合杀菌剂对插穗的影响。

Lesion numbers on the inducer-treated plants treat with BTH, JZG and TS were significantly less than on control plants, in the meantime, treatment with BTH, JZG and TS led to an increase in activities of chitinase and β-1,3-glucanase in tobacco leaf tissue. Indicated these inducers triggered SAR in tobacco plants; in the same, BTH, JZG and TS were sprayed on the 1st leaf on melon plant before challenge inoculation with Erysiphe cidhoracerum.

发酵液、3—氨基丁酸(3-amin-butyric acid，3—ABA)和茉莉酸(Jasmonic acid，JA)等9种供试诱导剂在珊西烟上进行筛选：用各种诱导剂分别处理珊西烟从下数第6片真叶，上部第7、8、9叶挑战接种TMV，调查比较发病后枯斑数，筛选结果表明，只有经BTH、JZG和TS三种诱导剂处理的珊西烟叶片上的TMV枯斑数较对照显著减少，并能诱导珊西烟叶片中几丁质酶和β-1，3-葡聚糖酶活性增强。

The result suggests that the plant was infected with geminivirus. Stem scions from the plant were graft-inoculated to I. purpurea. Three weeks later, the indicator developed symptoms of leaf curling and interveinal chlorosis. The geminivirus can be transmitted by whitefly.

实验表明该染毒材料嫁接到指示植物牵牛上三周后牵牛植株产生卷叶和叶片变黄的症状；病毒可由白粉虱传播，初步认定该病毒是菜豆金色花叶病毒属的甘薯卷叶病毒(sweet potato leaf curl virus，SPLCV)，将其命名为SPLCV-CN。

Oilseed rape were inoculated by spraying when they had three leaves, Tu-100 populations were not detectable on stems and leaves 20 days after spraying, and their resistance to Sclerotinia disease were decreased gradually with time.

在油菜三片真叶时喷雾接种一次，20d后，在茎和叶上不能检测到所接种的Tu-100，并且抗菌核病的能力也逐渐减弱。

Rubescens, three new diterpenoids,together with seven known diterpenoids, two triterpenoids and tritriacontane.

Rubescens叶和嫩枝中分离出十三个单体化合物，其中有三个新的二萜化合物，七个已知的二萜，二个三萜化合物和三十三烷。

The chlorin e6 7 and chiorin 11 were oxidized further with osmium oxide in the same oxidization condition to yield bateriochlorin 8 and 12, respectively.

卟吩醛2在碱性条件下转化为卟吩e6三甲酯7，2与烷基溴化镁的格氏反应给出脱镁叶绿酸醇9，选择高钌酸四丙基铵和N-甲基吗啉N-氧化物将3-位羟基氧化成羰基，所生成的卟吩二酮10在酸性条件下脱去甲酸甲酯生成焦脱镁叶绿酸衍生物11，用四氧化锇对7和11实施氧化，则分别转化为细菌卟吩衍生物8和12。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。