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桃小食心虫的卵,多单粒散产于苹果果实的萼洼附近。因此,调查果园中的产卵情况,并结合分析各代卵的卵期,就可以确定桃小食心虫的防治适期。果面查卵,既可以应用定果法,也可以应用随机法。应用定果法时,要在上年被害较重的园片,选择着卵量较高的品种(如金帅、红香蕉等)5～10株,每树按东,西、南、北、中5个方位,共标定100～200个果实,逐一挂牌编号。从越冬代成虫羽化开始,每天逐果调查一次着卵情况,记载卵果数,至田间卵终见日止,计算日卵果率和累计卵果率。应用随机法时,要沿栽植行或沿梯田田面,隔行选株调查。在果园面积较大或被害较重时,可以多间隔几行树,一般每点调查200个果。在果园面积较小或被害较重时,可
Peach mung bean eggs, more than a single grain scattered in the apple fruit near the calyx depression. Therefore, the investigation of oviposition in the orchard, combined with the analysis of the eggs of each generation of eggs, we can determine the peach Gourd prevention and control of the right period. Finding eggs, both the application of fruit law, you can also apply the random method. In the application of the fruit set method, 5 to 10 plants with higher egg yield (such as Jin Shuai, red banana, etc.) should be selected in the heaviest parked trees of the previous year. Each tree is divided into east, west, south, In 5 directions, a total of 100 ~ 200 calibration fruit, one by one listed number. From the overwintering generation of adults began to emerge, the results of the investigation by the fruit every day, record the number of eggs, eggs to the field until the end of the day, calculate the rate of egg and fruit of the cumulative egg rate. Application of random method, to be planted along the line or along the terraced fields, interlaced plant selection survey. In the orchard larger or heavily harmed, you can more than a few rows of trees, the general survey of 200 fruit per point. When the orchard is small or heavily harmed, you can