拒食

在牛第一个症状包括精神迟钝、拒食和产奶量减少。

In cattle , the first symptoms include dullness , refusal to feed and a fall in milk production .

其余的供试植物提取物24h和48h的拒食率均在70%以下。

The other extracts of plant species possessed under 70 % antifeeding activities after 24 h and 48 h treated .

一类新型昆虫拒食剂的合成及利用~（32）P标记法对桃蚜拒食活性的测定

Syntheses of a new kind of insect antifeedants and using ~ ( 32 ) p labelling method to test the antifeedant activities of these compounds to aphids

感染对虾出现拒食后，其血液中白斑症病毒（WSSV）DNA的相对含量急剧增加。

The relative content of WSSV DNA in blood increased rapidly after the infected shrimp showed its first symptom of detestation of food .

在拒食试验中，24h的拒食率为96.1%。48h为96.2%。

In the anti-feeding experiment , anti-feeding rate of 24 hr was 96.1 % and of 48 hr was 96.2 % .

另外结果表明，A3的拒食活性最大，AFC（50）为1.6730mg/mL；

In addition , the results also showed antifeedant activity of A3 was maximal ( AFC50 is 1.6730mg / mL ) .

说明印楝2种提取物对瓜绢螟3龄和5龄幼虫均具有较好的拒食活性，而在同一浓度下，CO2超临界萃取物对瓜绢螟的拒食活性高于常规溶剂萃取物的。

It is concluded that the two extracts had high anti-feeding activity and that the effect of the extract from CO2 supercritical fluid extraction methods was higher than that of conventional methods at the same concentration .

用叶片浸渍法测定了印楝素（Azadirachtin）对小菜蛾抗性及敏感种群拒食活性。

The anti-feeding activity of Azadirachtin to susceptible and resistant population of Plutella xylostella were determined by applying the method of leaves-tip bioassays .

它除了具有拒食及胃毒作用外还能作用于昆虫的神经系统，引起GABA含量升高，使试虫具有兴奋-吐出中肠液-瘫软-昏迷-死亡的症状；

Besides inhibiting feeding and poisoning stomach it can effect on nerve system of insect , which lead to GABA content increasing and the test insect had the symptom of exiting-spitting out liquid-paralysis-coma-death ;

非选择性拒食作用结果表明，95%的酒精提取物具有良好的拒食效果，12h和24h的拒食率分别达到了90.29%和84.15%。

The results of the non-selective antifeedant effect showed that 95 % ethanol extract had good effect for the larva , the antifeedant effect was 90.29 % and 84.15 % after 12h and 24h .

印楝（AzadirachtaIndicaA.Juss）种仁中含有印楝素A（azadirachtin）等活性成分，对害虫具有显著的拒食作用和生长抑制作用。

Azadirachtin , the most potent insect antifeedant and growth-regulating agent , is extracted from the seed of the neem tree , azadirachta indica A. Juss .

在姜黄的顺序提取物中，正己烷提取物对粘虫的拒食作用最强，拒食率达100%，而在处理后72h的校正死亡率为37.21%；

Among the sequential extracts of turmeric , the antifeedant action of hexane extracts was highest , the antifeedant rate was 100 % and the corrected mortality after exposure 72h was 37.21 % .

HD1无晶体突变株（Cry-）芽孢对棉铃虫无毒也无拒食作用；

The spores of a HD 1 mutant without crystal , Cry - , had no toxicity and feeding deterrence .

转Bt基因抗虫棉对3,4,5龄棉铃虫幼虫的抗性表现形式为拒食作用，且随幼虫龄期的增加拒食作用明显降低，其中对5龄幼虫的拒食作用很低。

Bt transgenic cotton had anti-feeding activity to the 3rd , 4th , 5th instar larvae of cotton bollworm and the activity reduced significantly with the increase of larvae instar , among them the activity to the 5th instar larvae is very poor .

采用注射、熏蒸、点滴、饲喂、内吸等方法测定了茶皂素对菜粉蝶PierisrapaeL.5龄幼虫的拒食活性。

The antifeeding activity of tea saponin against the 5th instar larvae of Pieris rapae were determined by the methods of injection , topical application , fumigation , systemic action and feeding , etc.

试验表明，1%苦槛蓝氯仿萃取物对菜粉蝶4龄、5龄幼虫的非选择性拒食率均在94%以上，对4龄幼虫的AFC（50）、AFC（95）分别为0.12%和0.78%；

The results indicated that chloroform extract shows higher level bioactivity than methanolic and petroleum ether extracts . The antifeeding rate with 1 % chloroform extract was above 94 % against 4th and 5th instar larvae of P. rapae in no-choice tests .

测试广西12种野生楝科（Meliaceae）植物提取物对黄曲条跳甲成虫[Phyllotretastriolata（Fabricius）]的非选择性拒食作用和毒杀作用。

Non-choice Antifeeding and contact toxic effect of crude extracts of 12 species of wild Meliaceae from Guangxi were evaluated by the laboratory bioassay against the adult of Phyllotreta striolata ( Fabricius ) .

7种提取物中，以种子乙醇提取物（ESPH）对斜纹夜蛾3龄幼虫的非选择性拒食活性最高，24h拒食率为70.15%。

The antifeedant rate of ethanol extract of the seed of P.harmala ( ESPH ) against 3rd-instar larvae of Spodoptera litura F. was 70.15 % after 24h in no-choice test , and ranked the highest among the extracts .

与阿维菌素丙酮溶液（CK1）相比，该配方对试虫的触杀作用高出57.5%，选择性拒食作用高出59.5%；综合评估指数（EI）高出38.5%；

Compared with abamectin ( CK_ ( 1 )), the touch poison action was 57.5 % higher , the selective antifeedant action was 59.5 % higher and the evaluating indexes ( EI ) of optimized Cantharidin ME were 38.5 % higher , respectively .

用500μg/ml的麦黄酮溶液涂抹到对褐飞虱敏感的水稻品种TN1植株上对褐飞虱雌成虫有明显的拒食作用和忌避产卵作用。

Additionally , tricin ( 500 μ g / ml ) significantly inhibited oviposition and feeding of the brown planthopper females in choice tests when spread on susceptible rice plant ( TN1 ) .

当菌剂浓度为10μg/g、感染7d时，HBF-1菌株对铜绿丽金龟幼虫的拒食率和生长抑制率分别为4.74%和9.84%，14d时分别为30.75%和73.87%；

When the A. corpulenta larvae treated with HBF-1 strain at the concentration of 10 μ g / g soil for 7 d , the antifeeding rate and growth inhibition rate were 4.74 % and 9.84 % , 30.75 % and 73.87 % for 14 d.

羟基马桑毒素（Tutin）对多种害虫具有神经毒性、胃毒和拒食作用。羟基马桑毒素的活性与其结构和官能团紧密相关，并且可以通过结构修饰得到提高。

Tutin has neurotoxicity , stomach toxicity and antifeeding activity on many insects . The insecticide activity of tutin was closely related to its structure and functional groups , and it could be improved by structure modification .

液&液分配法中，苯提取物的拒食活性最高，在50倍稀释浓度下，小菜蛾Plutellaxylostella和菜粉蝶Pierisrapae幼虫对其拒食率分别为97.7%和97.3%。

The benzene fraction of the liquid liquid partitioning was found to be the most active against the larvae of Plutella xylostella and Pieris rapae , with the rate of antifeeding , at × 50 dilution , of 97.7 % and 97.3 % , respectively , after 12 h exposure .

甘蓝叶碟厚度对昆虫拒食剂拒食活性的影响

Activity of Insect Antifeedant Influenced by Leaf Disc Thickness of Cabbage

紫茎泽兰提取物对小菜粉蝶幼虫的拒食活性测定

Antifeeding Activity Determination of Eupatorium adenophorum Extracts on Pieris rapae Larvae

5种有机酸对华山松木蠹象的拒食作用

Antifeeding Effects of Five Organic Acids against Imago of Pissodes punctatus

9种菊科植物提取物对蔬菜3种害虫拒食活性的研究

Study on Antifeeding Effects of 9 Asteraceae Plants against Three Pests

50种热带地区植物对斜纹夜蛾的拒食活性

Antifeeding activities of crude extracts from 50 tropical plants against Spodoptera litura

植物精油对害虫的忌避、拒食和生长发育抑制作用；

Repellent , antifeedant and insect growth inhibitory actions of essential oils ;

扶芳藤种油中的拒食活性化合物的X&射线晶体结构分析

X-ray crystal analysis on an insect antifeedant from seed oil of Euonymus fortunei