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With the world-wide quarantine pests western flower thrips Western flower thrips (Frankliniella occidentalis) successful invasion of our country, our crops and cash crops serious economic losses and a potentially significant threat is attracting more and more attention. In order to better prevention and control of invasive species, common economic crops cucumber cucumber (sativus Linn) as host plants, using a combination of research methods of experimental ecology and physiology and biochemistry Comparative Study the different exogenous inducible factor jasmine methyl (Methyl jasmonate, MeJA) and salicylic acid (Salicylicacid, SA) processing, the host cucumber directly insect resistance to western flower thrips survival and development of fitness and indirect insect resistance to western flower thrips take the impact of food selectivity and after induction differences in cucumber substances in the body changes and volatile substances investigate or resolve exogenous factor-induced mechanism of insect resistance of cucumber, prevention and control of western flower thrips plant resistance angle to provide a certain The theoretical basis. The main results or conclusions are as follows: (1) salicylic acid, methyl jasmonate induced cucumber western flower thrips compared different concentrations (5mmol.mL-1, 0.5mmol.mL-1, 0.05 mmol survival fitness. mL-1) SA, different concentrations (1mmol.mL-1, 0.1mmol.mL-1, 0.01mmol.mL-1) MeJA, insect injury (the Damage by thrips'feeding, DTF), mechanical damage (Mechanical DAMAGE, MD host plants) and control (healthy plant) (Control, CK) 9 different processing cucumber suitable degree of survival of the western flower thrips, the results showed that compared to the control CK, SA and MeJA treatment can effectively induce cucumber production of anti- insects, significantly extend the western flower thrips and development time, inhibition of pupal weight, reduce the survival of western flower thrips fit; the MD treatment compared to the control CK insect resistance, for the growth and development of the western flower thrips significantly affect just pupal weight increased and therefore MD processing cucumber can partially improve the survival of insects fitness; DTF compared to the control CK induced insect resistance best effect, inhibition of the western flower thrips growth and development of the most obvious; MeJA treatment compared to SA treatment, nymph development time average long-1d, pupal weight reduction of more than 0.01mg, description the MeJA induction is more effective to improve plant resistance to insects; several other inducible factor than the significant effect for the sex of the western flower thrips. (2) salicylic acid, methyl jasmonate induced cucumber insect resistance in vivo part of the material basis for comparing the different concentrations of SA of MeJA was, DTF, MD and CK9 different treatments host plants cucumber body physiology class of nutrients (protein , amino acids, free fatty acids, fructose, water content and chlorophyll), secondary metabolites (tannins and flavonoids) and defense-related enzymes [(the peroxidase (Peroxidae POD), polyphenol oxidase (Polyphenol oxidase, PPO) phenylalanine ammonia-lyase (Phenylalanine ammonia-lyase, PAL) and protease inhibiting hormone (Proteinase inhibitor, PI)] different dynamic analysis of their role in plant resistance, the results showed that the plant resistance by three the combined effect of the aspects of substance of which the the physiological nutritional substances as a whole the lower the content is less conducive to the growth and development of the western flower thrips, not by a particular decision, and MeJA and SA treatment compared to the control CK reduce plant nutrient substance the content; secondary substances in the flavonoid content compared tannins relationship with the host plant resistance to insects closer a correlation coefficient of 0.67, compared to the control CK and SA, MeJA processing, can significantly improve the content of flavonoids and tannins; defense enzyme, PPO and PI relative enzyme activity is more important for insect resistance in cucumber, POD and PAL enzyme activity of insect-resistant effect is not obvious, which SA is capable of inducing the improvement of the POD and PAL enzyme activity, MeJA mainly to improve the PPO and PI SA insect-resistant material basis for a major role may be caused by a decline in host plant cucumber physiological substances play a leading role; while the the MeJA insect resistance the material basis may be no significant difference between the three (3) salicylic acid, methyl jasmonate induced cucumber western flower thrips feeding preference of western flower thrips salicylic acid (0.5mmol.mL-1), methyl jasmonate (0.1mmol.mL- 1), insect injury, mechanical damage and clean control five different processing types of host plants of cucumber feeding tropism, as well as the differences of the different host plant volatiles results show that the western flower thrips starvation followed by insect injury, jasmine and methyl salicylate treatment selectively and gradually increase the performance of clean seedlings most hobby; another the processing host plants cucumber volatile matter content and composition of most insect feeding, and then followed by methyl jasmonate salicylic acid, mechanical damage and clean seedlings were of clean seedlings control volatile substances and mechanical damage component content of 85% or more green leafy ingredient, insect injury and methyl jasmonate treatment more than 75% of the volatile substances are terpene class, (E) -4,8 - dimethyl-1 ,3,7 - nonatrienyl, D-2-pentene, terpenoids, farnesene and ocimene, etc., which may exist on the western flower thistle Ma aversion of the material.
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