Friends in the north can skip this article directly to read the next one, because weevils are basically absent in the northern fig orchards, and the Sichuan-Chongqing region is "abundant". Some time ago, a Ms. Zhu from Bishan, Chongqing, sent two photos as follows:
Yes, this is the elephant trunk worm, Chen Ning only listened to the director of the Weiyuan Fig Research Institute Li Jinping said, but how can the northern fig rarely have this kind of bug, so Chen Ning has not seen the real thing so far. Consulting various information, there are few insect pests in general figs, and pest control refers to four major categories: tianniu (the most famous), thrips, ants, and nematodes. Weevils are rarely mentioned, and weevil control is easier to ignore. Because the harm of the weevil is not obvious in summer, in the winter its larvae drill into the roots of the tree, eat the roots of figs, drill the tree body, its larvae are shorter than the larvae of the tianniu, the roots of the moth-eating tree have no stomata, and the insect feces are around or up and down the soil, which is difficult to find. Weevils are seriously harmful to young fig trees, and neglecting the weevils can cause the destruction of the entire park.
It is better to read thousands of books than to walk a thousand miles, and it is better to walk a thousand miles than to be guided by a high person, so Chen Ning consulted Deng Zong of the Tuopu Fruit Industry in Mianyang, Sichuan. The prescription given by Mr. Deng is as follows: The drug is commonly used for the prevention and treatment of cypermethrin in Tianniu, but the use and use time are the key. For the first time, in the Mianyang area of Sichuan, when the temperature warmed up around March, when the pupae became larvae and began to come out to feed, the root irrigation + spraying was carried out at the same time, not only the roots or only spray, because the weevils were active underground at night and active on the ground during the day. And the whole park is sprayed, including the park's roads and grass. The second time is to spray again after a week, so that 2-3 sprays in a row can basically "break the roots" of the weevil. Hopefully, this article will be helpful for fig orchards with weevil hazards.
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