高温处理对采收期滑皮金桔叶片柑橘红蜘蛛虫口数量的影响

Effects of High Temperature Treatment on Pest Amount of Panonychus citri McGregor in Leaves of Kumquat During the Harvest Time

融安滑皮金桔成熟期覆膜留树保鲜条件下易受柑橘红蜘蛛危害,为防治金桔果实成熟期柑橘红蜘蛛危害,对覆膜增温电热器辅助加温方式设置了34,38,42℃三个处理温度,每天处理4h,分别处理1,3,5d,并在处理后第5、第10和第15天调查每10片叶的虫口数量,探讨覆膜环境下,不同处理温度和时间对柑橘红蜘蛛(Panonychus citri McGregor)虫口数量的影响。结果表明:在34℃温度下,连续处理5d时,在第15天能降低虫口数量达80%以上;在38和42℃条件下,只需处理1d,在处理后第10天,均能降低虫口数量达90%以上,且虫口数量降低率随着连续处理天数延长而增加。覆膜增温至34℃以上并维持一定时间就能显著降低滑皮金桔成熟期柑橘红蜘蛛数量,减轻柑橘红蜘蛛对融安滑皮金桔的危害,提高果实的外观品质。

Under the retain freshness technology of tree coating thin film,the smooth leather kumquat from Ronan is very easy to be damaged by the Panonychus citri McGregor during harvest period.In order to control Panonychus citri McGregor in the mature period of kumquat fruit,the influence of temperature and time on the insect density of Panonychus citri McGregor were studied in this paper,and the following experiments were carried out under the technology of the tree coating thin film.The room temperature was kept in 34 ℃,38 ℃and 42℃respectively,4 hours per day.The treatment time is 1 d,3 dand 5 drespectively.The insect density on every leaf was determined at 5 d,10 dand 15 drespectively.The results showed that the insect density was decreased to above 80%at 15 dunder the condition of 34℃and treatment time of 5 d.The insect density could be decreased to above 90% at 10 dunder the condition of 38 ℃ or 42 ℃ and treatment time of 1 d.Furthermore,the reduction rate of insect density was increased with the increase of treatment time.In a word,when the temperature is above 34℃and kept for some time,the density of Panonychus citri McGregor is decreased obviously during harvest period of smooth leather kumquat.The damaged of smooth leather kumquat from Rongan by Panonychus citri McGregor was decreased and the surface quality of fruit was improved.