Avoiding the Alternative Way of "Ponkan" Listing

"Ponkan" is a fruit fly attached to the citrus surface of the fruit, slowly matured into the fruit of the citrus fruit formed inside the damage. Although harmless to the human body, but because of the appearance like a mole, easy to make people nausea. In recent years, orange citruses have been reported in several major citrus-producing provinces. The people have heard of orange color, which has seriously affected the sales volume and price of citrus.

The traditional control measures for citrus fruit fly generally include trapping and killing adult worms, removing pods to kill larvae, and eradicating overwintering larvae. However, due to their habits, it is difficult to achieve a cure. In order to avoid the situation of the citrus market, but also significantly reduce the "Ponkan" impact on the citrus commodity rate, provide a method for reference.

Citrus big fruit flies occur one generation a year, with the earthworms wintering in the soil. The adults emerged from late April to mid-June, and spawned from early June to mid-July. The larvae matured from mid-October to mid-November, and they burrowed into the soil. If the time for disposing of the citrus tree is appropriately delayed and the fruits that have caused the damage are dropped naturally, the occurrence of “ponkan” of the fruit under the tree will be greatly reduced. Most of the citrus varieties in our province are medium and late-maturing varieties. In mid-to-late January, if the picking time is postponed until the end of November or early December, it is basically possible to avoid “ponkan”. Listing situation. In 2011, the Suixi County Plant Protection Station conducted a trial to postpone a citrus plantation that was damaged by citrus fruit fly around 5 mu until December 3rd. The incidence of “ponkan” was only 0.12 in the reference area. Hey, the absolute incidence is only 1.4 ‰. The effect is obvious.

At the same time, it should be noted that delaying the picking time of the citrus must grasp the changes in the weather, do a good job of preventing cold and frost in the fruit trees, and guard against low temperatures and snowfalls to avoid losses caused by postponing picking. This method can not reduce the actual harm of citrus fruit fly on fruit trees. It can only reduce the incidence of “ponkan” when the citrus is marketed. It is necessary to fundamentally solve the problem of “pongan” and still need to carry out the citrus fruit fly. Scientific rule of defense.