| 1. The main pests and their natural enemies of apricot orchardThe results show that main pests of apricot orchard in xinjiang kuche are belong to 5 order,10 families and 16 species. Nature enemy 21 species in all, including predatory 9 species, parasitic 12 species.2. The biology of apricot main pests larvae,Orthosia incerta (Hufn.) larvae,Hyalopterus amygdali (Blanchard),Grapholitha molesta BusckThrough the study we find out the occurrence and population dynamics of Acleris fimbriana Thnuberg male adult,Cydia pomonella L. male adult,Scolytus seulensis Murayawa. Define the host plants and occurrence in a year of new incoming pest Acleris Fimbriana Thnuberg. Cleared the following effect of Hyalopterus amygdale(Blanchard)'s predators and parasitoids,per generation spawning law of Pseudaulacaspis pentagona (Targioni-Tozzetti).3. Acleris fimbriana Thnuberg and Pseudaulacaspis pentagona (Targioni-Tozzetti) spatial distributionAll indices indicate show that the spatial distribution of the Acleris fimbriana Thnuberg larvae on the trees was belongs to the aggregate pattern. And between individuals repel each other. The aggregation was caused by both its behavior and environmental conditions or one of the two reasons.The mathematical statistics analysis results show that on tree densities of the east, south, west and north 4 azimuth had no significant difference, and density of upper, middle and lower among differences were significantly.The suitest sampling quantity model of the different larvae density were presented on the base of the spatial pattern analysis.The results show that the population of Pseudaulacaspis pentagona (Targioni-Tozzetti) female adult performed gathered distribution, which was caused by the environment condition and the insect population. Its intensity of accumulation was increased with the rising of population density.4. Control technology of apricot main pestsThe results showed that the board-type have the best effect in three types of traps made by ourselves, and then is the pipe-type, the last is bottle-type. The study of trapping moth effect of different quantity trappers in unit area show that ninety per hectare is enough when occur less, along with increase should add more traps. Control text show that disruption area prevention is 77.78%, and trap area is 90.75%. Trap area control effect obviously better than the disruption area. The rate of mating disruption respectively is 76.2% and 66.11%.The toxicity research of 6 kinds of pesticide showed that,the toxicity LC50 (mg/L) of 6 pesticides to larvae of Acleris fimbirana Thunberg by size order were:Cypermethrin 4.923 3,Kingbo 5.788 6,Acetamiprid 9.168 0,Abamectin 11.324 9,Actara 22.591 6,Pyrethrins 80.683 6.In the field control efficiency we can conclude that 4.5% Cypermethrin had better control effect,after 6 days,achieve 100%,and then is Kingbo,after 10 days, control effect achieve 93.75%.5 kinds of pesticide's toxicity LC50 (mg/L) of by size order were:Kingbo 12.356 2,Cypermethrin 25.1378,Spirotetramat 25.372 5,Pyrethrins 42.737 8,Lorsban 206.241 0. The control efficiency of 24% Spirotetramat and 4.5% Cypermethrin were all better in field,after using 20days control effect achieve 93.93% and 80.4% respectively, and significant difference between them.5. The niche of main pest and their natural enemies in different apricot orchardThe pests and natural enemies are certain difference in this two apricot garden. Whether old apricot garden or young, predators relative to pests vertical niche is limited.but in old garden decay trunk pests have comparison narrow ecological niche breadth,niche overlap was much smaller in other insects.Scale insect and feeding leaves pests have smaller overlap between them. The young and old apricot garden have wide level niche, breadth,This show that the pests and their natural enemies in horizontal distribution have little differences,Thus overlapping is big. The young and old apricot garden temporal niche is quite difference, niche breadth is relatively smaller in these insects. |
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