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The Research On Biophysical Control In Apple Pests

Posted on:2006-07-29Degree:MasterType:Thesis
Country:ChinaCandidate:Z H DuFull Text:PDF
GTID:2143360182970364Subject:Agricultural extension
Abstract/Summary:PDF Full Text Request
Apple industry in china develops rapidly recently. The Area and output range first in the world, but it needs spraying much Chemistry agricultural chemicals because of the pests, therefore the agricultural chemicals remainder becomes one of the essential factors to restrict apple outputting and food safety. We should not only control harms from diseases and pests but also reduce the using of agricultural chemicals, so the Biophysical control becomes more and more important in the system of apple pest prevents and controls. this research uses some physical tools such as special lamp killing pests and Special-purpose belt tempting pests and killing them, the pests ectohormone, and artificially releasing of natural enemy . We use these materials and methods to reduce the harms of the apple pest and disease, from my research , it is sure that we use Biophysical methods to against and except the main pests of apple .it reduce the base of the pests Occurring remarkable. So. in some degree, they can Substitute chemical control effectively.The result of test Indicates: 1 )frequent pest-king lamp have intensely effect to tempt and kill pests who have phtotokinnesis, each lamp can cover an area of 13 to 15 mu of orchards, it can tempt and kill common pest, Including 5 items, 21 faculties, 41 genus。 The effect to Adoxophyes orana almost reach the level of commonly used methods. More than 67% Odonestis pruni are killed before they spawn. The method of tempting and killing cost 12.2 RMB/mu, which is 25.8 RMB less compared with common methods. It is a useful physical method to control pests in Orchard. 2)the special belt made by ourselves to tempt pests have a good use to tempt pests who survive in the winter in the seam of the dead trees, it can reduce the base of the pests over winter, it can reach the same result compared with the commonly used methods, it could reduce about 50% amount of insecticide after using this method. The fruit specific belt that tempt pests has a good effect, could be used simply and conveniently, also is costless and has no pollution to environment. 3)Hormones (Dosage,500ug/mei) produced by Animal Institute of Chinese Academy of Science, could effectively interfere mating of Lithocolletis ringoniella. The number of moth tempted in experimental zone is 20%of the one in CK zone. The population is 73.6% less than the one in CK zone .The survival rate of autoeciousness bee could reach the point of 81.7%. There are no distinct leaf falling caused by pests.4)the adult of Coccinella seplempunctata and elderly nymphet could make the aphids feel nervously for about 78 seconds when they are hunting. The hunting ability of female beetle in two ages to the population of Aphis citricola vander can fits perfectly with Holling-II Equation, the hunting ability of its different population can fit Hassell Equation well.(female beetle) not only hunt them but also make them homelessly, nervously, and reproduce lowly. In all, female beetle have a distinct effect on the population of the aphid. Aphids disappear in two weeks' artificially release of female beetle.With the combination of natural enemy and Biophysical control, this could form green management system to apple pests, we can reduce the use of chemistry, agricultural chemicals, and to reduce the remainder of chemistry agricultural chemicals in apples.
Keywords/Search Tags:Apple pest, Biophysical, control, Green management system
PDF Full Text Request
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