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The Occurrence And Control Technique Of Toxoptera Aurantii And Polyphagotarsonemus Latus On Macadimia Nut

Posted on:2020-12-01Degree:MasterType:Thesis
Country:ChinaCandidate:B C HuangFull Text:PDF
GTID:2393330572966379Subject:Agricultural Extension
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Macadamia is an evergreen tree of the genus Macadamia,which has strong ornamental value,edible value and economic value,and is very popular with growers.So far,the area of planted macadamia in Guangxi has reached 150,000 mu.But the infestation of pests and diseases is a serious problem that plagues growers.After investigation of the macadamia pests and diseases in Yulin City,it was found that Toxoptera aurantii(Boyer de Fonscolombe)and Polyphagotarsonemus latus(Banks)were more serious.Through field surveys and experiments,to understand the field population dynamics of Toxoptera aurantii and Polyphagotarsonemus latus,to screen out effective prophylactic agents,to evaluate the effects of prevention and control techniques such as yellow sticky plate booby traps and winter clearing,to provide a scientific basis for the development of comprehensive prevention and treatment measures for the two harmful organisms.The main results of this study are as follows:1,Toxoptera aurantii is mainly harmful to the leaves,shoots,shoots and flowers of Australian nuts.It was first seen at the end of February and early March.At this time,the insect index of Jianyuan Garden in Shuanghe Village and Liulong Village was 0.7 and 3.3 respectively.The number of populations in March began to increase.There was a small peak in May,insect index reached 62,42 respectively,followed by a fall,and it began to pick up in September.In October,there was a small peak,insect index reached 66,41 respectively,and then it fell back.2,Polyphagotarsonemus latus mainly harm the leaves and shoots of Australian nuts.It was first seen in March,insect index of kin Orchard in Shuanghu Village and LiuLong Village was 2.3 and 0.4 respectively.In March,the number of populations began to increase.In late May,there was a small peak.insect index reached 38 and 41,At the end of August and early September,there was another small peak from the end of September to mid-October,insect index reached 44 and 46,then fall back.3,The yellow sticky insect board can prevent and control the Toxoptera aurantii,The effectiveness of prevention and treatment is over 91%.which has no effect on the normal growth of macadamia,and is safe for the natural enemies of Toxoptera aurantii.In winter,Qingyuan can prevent and control Polyphagotarsonemus latus,which can effectively reduce the number of insect mouths of Polyphagotarsonemus latus in the following year and reduce the harm caused by Polyphagotarsonemus latus.4,The results of field efficacy tests show that,Imidacloprid,pyripyriidone,and pyridyl have a good effect on the prevention and treatment of Toxoptera aurantii.The effects of acarate and alkyne acarate on the control of Polyphagotarsonemus latus were better.Imidacloprid is used to prevent and treat Toxoptera aurantiibby 10,000 times water leaf surface spraying.After l day of medicine,the anti-effect is more than 75.3%.After 15 days of medicine,the anti-effect is more than 99.3%.Pyripyridone is used to prevent and treat Toxoptera aurantiibby 2000 times water leaf surface spraying.After 1 day of medicine,the prevention effect is more than 32.1%.After 15 days of medicine,the prevention effect is more than 99.6%.According to 1600 times the water and leaf surface spraying to prevent and control Toxoptera aurantiib,After 1 day of medicine,the prevention effect is more than 70.8%.After 15 days of medicine,the prevention effect reached 99.7%.Helicoester is applied to prevent and control Polyphagotarsonemus latus by 4000 times water leaf surface spraying.After 1 day,the prevention effect is more than 32.9%.After 15 days,the prevention effect is more than 98.1%.The alkyne mite is specially applied to prevent and control Polyphagotarsonemus latus by 2500 times water leaf surface spraying.After 1 day,the prevention effect is more than 65.4%.After 15 days,the prevention effect is more than 97.6%.
Keywords/Search Tags:macadamia nut, Toxoptera aurantii, Polyphagotarsonemus latus, occurrence, control technique
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