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A Study On The Application Technology Of Sex Pheromone Attractant Of Dendrolimus Tabulaeformis

Posted on:2017-02-13Degree:MasterType:Thesis
Country:ChinaCandidate:K M DuFull Text:PDF
GTID:2283330485469898Subject:Forest Protection
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Dendrolimus tabulaeformis Tsai et Liu belonging to Lepidoptera Lasiocampidae D.tabulaeformis. They distribute mainly in Northern china, Shandong, Liaoning, Shanxi and the other places. D.tabulaeformis can destroy Pinus tabuliformis, Pinus thunbergii Parl, Pine pinus massoniana and other kinds of pines in China. Many larvas eat pine needle, even eat all needles, which is the most serious group among Chinese forest pests. Sex pheromone attractant of D.tabulaeformis as an effective method to prevent, trap and forecast. However, the forestry application technology hasn’t yet been perfected. Also, how to assess the forest population density has always been a pheromone application bottlenecks by monitoring quantity of sex pheromone atrractant. Based on this, this thesis focuses on forestry application technologies research of sex pheromone attractant of D.tabulaeformis, screening out the best parameters of each index in the process which is the forestry using of the lure of D.tabulaeformis and developing the main component of host volatiles combined sex pheromone attractant obviously. Secondly, combining artificial ground survey about population density and leaf loss rate, analyzes the correlation between population density and trap quantity and leaf loss rate to build coupling model. Pest monitoring increased from qualitative to quantitative, and because the rate of leaf loss introduction of indicators for the next step and aerial remote sensing data further coupled to lay the foundation. The main results are as follows:1. The research of forestry application technology parameters of sex pheromone attractant,the effect of black traps are best and a little better than orange traps. The trapping number of suspension heigh from the ground 1.7m is better than it in 0.5m and 2m.The effect by ship-shaped traps catch mothes is better than the multifunctional cylindrical trap and triangle trap do; And trap number in sunny slope is much more than in shady slope; In the above traps setting, the distance is at least 30m. When we save a lure, the residual content at 4℃ is higher than 15℃、20℃ and 25℃ three treatments. So we should consider these above different parameters to be set when we use the traps and the lure.2. The research of an important synergistic effect in sex pheromone attractant. After identifying kinds of volatile matter of host in P.tabulaeformis, we need test D. tabulaeformis’s EAG to volatile substances indoor. EAG determination results turned out that decanal、nonanal、 limonene、camphene、caryophyllene、R-α-pinene have strong stimulation to D.tabulaeformis. Male antennae and female antennae have similar reactions to EAG of volatile matter of most hosts. But for nonanal, male has a more obvious reaction to EAG than female. In forestry test, when these volatile matters mix, it has the most obvious effect to lure D.tabulaeformis. Using ship-shaped traps in the field to measure host volatiles combined sex pheromone got obvious effect.The results show that volatile matter of host play an important synergistic effects in trapping D.tabulaeformis by sex pheromone attractant.3. The research of coupling model among forestry population density, trap quantity and leaf loss rate. And the coupling model between population density and trap quantity showed that, with low population density of larva(<80), the trapping number of adult had significantly correlation with the population density of larva, which could be simulated by quadratic function equation yi=-0.06x12+6.174x1-85.753, and R squared is 0.987; With high population density of larva (80< density≤129), which could be simulated by quadratic function equation y2=0.076x22-3.111x2+109.844, and R squared is 0.901; With higher population density (above 129 perplant),the population density of larva had decreased, which could be simulated by Linear function equation y3=-1.795x3+214.060, and R squared is 0.902. And the coupling model between leaf loss rate and population density showed that.with a certain ranged(<74%), population density increased with leaf loss rate.When rate of loss leaf is higher than 74%, pest population decreases. Which could be simulated by quadratic function equation y=-794.937x2+1188.218x-308.626, and R squared is 0.729. As for the coupling model between leaf loss rate and trap quantity, which could be simulated by quadratic function equation y=-189.035x2+272.374x-53.474, and R squared is 0.913.
Keywords/Search Tags:Dendrolimus tabulaeformis, Sex pheromone attractant, Host volatiles, Trapping number, Population density, Leaf loss rate
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