Study On Occurrence And Controlling Technology Of Jiangyong Resseliellacitrifrugis Jiang

Resseliella citrifrugis Jiang is an injurious insect on grapefruit. Its distribution in HunanProvince, and its morphology and bionomics are described in detail in this paper. It occurs for 4 generations every year in Hunan, and over-winters with the forth instars larvae in soil or in pomelo. The adult begins to emerge in the last ten days of April. The larvae have 4 instars and their damage can result in the drop of pomelo. The second and last ten days of May, the last ten days of June to the first ten days of July, and the last ten days of August to the first ten days of September are the three damage peaks, especially the first period. The control measures are as follows: (1)Strengthened quarantine measure, In all epidemic diseases area fruit and the nursery stock, not passes through the local plant quarantine organization the quarantine, all must not arbitrarily transport to the epidemic disease area outside, otherwise, according to causes the epidemic situation proliferation punishes;(2) Artificially picks the deinsectization fruit, carries over the outside of garden destroys, the winter clear garden, to all has this insect's orchard, all must thoroughly pick the deinsectization fruit, the prematurely dropped fruit and the peel in the winter ago, in the sum aggregate destroys;(3) Generally after the beginning of February the temperature rise, phoxim, the granule will mix duplicate Hefei evenly scatters to the earth table, will exist side by side soon the surface soil digs turns, causes the medicament evenly to distribute in the surface soil, like this, since will be allowed to destroy pomelo solid Lei Ying Wen survives the winter the environment, and, when the pomelo solid thunder mosquito will survive the winter on the young insect will transfer to the earth table pupation, can because of contact agricultural chemicals kill, thus enhancement preventing andcontrolling effect;(4) The set of bag guarantees the fruit. Holds the first generation of insect fruit symptom performance the last phase , namely the pomelo fruit stereotypia time, the union,the vegetable and the fruit, thoroughly picks the deinsectization fruit, after promptly carries on one time of disease-carrying insect preventing and controlling, immediately wraps the bag guarantees the fruit.