胃毒作用

48h后因胃毒作用而导致的死亡率为30%。

Mortality due to the stomach poison was 30 % after 48 hours .

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 ;

采用夹毒法测定，SCEE处理2天后菜粉蝶五龄幼虫胃毒作用的LD50为12.32mg/头。

The LD 50 of stomach poison of SCEE against the fifth instar larvae of P.rapae was 12.32 ? μ g / larvae day 2 after treatment .

DNJ与槲皮素对试虫触杀与胃毒作用等效，且胃毒作用下的死亡率高于触杀作用。

DNJ and quercetin have the same effect of contact toxicity and stomach toxicity to experiment insect , and the mortality of stomach toxicity is higher than contact toxicity .

20种树木提取液对蔬菜害虫胃毒作用的研究

A Study on Stomach Toxic Effect of Extracted Solution of 20 Tree Species on Vegetable Insects

三个盐峰均有很高的血腔毒性，但没有胃毒作用。

Materials from three NaCl eluting peaks had high toxicity when injected , but no toxicity when given orally .

研究表明，海芋凝集素对豆蚜有较强的抗生作用，其中以胃毒作用为主，有一定的生殖抑制作用，对豆蚜的蜜露分泌有一定影响。

It was identified that AOL had strong anti-aphid action , including most stomach toxic , quite reproductive inhibition and honeydew secretion inhibition .

白屈菜干物质索氏提取液和狼毒干物质超声波提取液胃毒作用效果为68.97%和67.86%。

And the stomach effects of the Soxhlet-extraction of dry Chelidonium majus and the Ultrasonic-extraction of Euphorbia fischeriana are respectively 68.97 % and 67.86 % .

以索氏法的甲醇提取物活性最突出，其主要作用方式为拒食和生长发育抑制作用，有一定的触杀和胃毒作用。

The extracts activities with methanol by soxhlet extraction was the most outstanding , and its main functions were antifeedant , growth inhibition as well as some contact and stomach toxicity effects .

对核桃青皮中次生物质的杀虫活性研究，结果表明：核桃青皮95%乙醇粗提物及其乙酸乙酯萃取部分对粘虫有较明显的拒食作用，且乙酸乙酯萃取部分有明显的胃毒作用。

The green walnut hull extract with 95 % ethanol and the fraction extracted from the extract above with ethyl acetate have obvious anti-feeding effect on armyworm and small vegetable-moth , and the fraction has obvious stomach poisoning effect .

通过计算死亡率与校正死亡率得出两种活性物质对甜菜夜蛾的触杀和胃毒作用明显，胃毒作用的致死率总体优于触杀作用。

Through the calculating the mortality rate and Adjusted mortality rate we know that two active substances have a obvious function of contact toxicity and stomach toxicity on spodoptera exigua larvae , and the mortality of stomach toxicity is higher than contact toxicity in general .

考察了蓖麻水提物和乙醇提取物对甜菜夜蛾的杀虫作用，其中蓖麻醇提物的杀虫活性相对更高，杀虫作用方式是触杀和胃毒共同作用。

The toxic action of Ricinus communis extract by water and ethanol against larvae of S.exigua was tested . The ethanol extract showed superior insecticidal activity compared with the water extract . And its insecticidal mode was combined action of contacting activity and stomach toxic activity .

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 .

当归乙醇提取物杀虫作用方式为胃毒和拒食共同作用。

The mode of insecticidal action of ethanol extract from Angelica sinensis was combination of stomach toxic activity and antifeedant activity .