In recent weeks, the summer-sown corn is in its critical emergence phase. However, this year has brought unusual weather conditions, including early drought and high temperatures, followed by a sudden drop in temperature. These climatic fluctuations have created favorable conditions for pests such as the two-spotted spider mite, second-generation armyworm, cutworm, gray plant hopper, and others. As a result, many corn fields are experiencing uneven germination, missing plants, and gaps in rows. Farmers report that underground pests like the golden beetle have already damaged ungerminated seeds. Newly emerged seedlings are also being cut off by the sericulture worm, while others face threats from cockroaches. Some seedlings show symptoms like rolled heart leaves or twisted growth, indicating potential disease issues.
The severe pest outbreak has significantly boosted the insecticide market. Distributors are actively recommending products like imidacloprid, acetamiprid, chlorpyrifos, and pyrethroids to farmers. Many dealers have even written down application guidelines on blackboards to guide users. This surge in demand contrasts sharply with the sluggish sales seen in the northern pesticide market earlier this year.
Due to prolonged spring drought and lack of rainfall, the pesticide market had been slow. In Wulian County, Shandong Province, farmers usually apply pesticides multiple times during wheat field management for pests like wheat stubble, red spider, and midge. Products such as imidacloprid, acetamiprid, and cyhalothrin were commonly used. However, this year’s dry conditions led many farmers to abandon wheat field management altogether, resulting in lower pesticide usage and a sluggish market. Additionally, delayed planting of spring peanuts due to low precipitation further reduced overall pesticide demand.
By early June, winter wheat entered the harvest period, but poor soil moisture forced farmers to wait for rain before planting. Moreover, the large-scale occurrence of corn rough dwarf virus has prompted experts to advise farmers to focus on controlling Laodelphax striatellus and avoid overplanting, which has further delayed the pesticide market. From peanut seeding to winter wheat harvesting, the entire pesticide market has remained in a downturn.
However, things began to change on June 17 when widespread rains hit the northern regions. Farmers started planting summer corn and soybeans, and the pesticide market gradually picked up. Herbicides like acetochlor and paraquat became popular, often mixed together with insecticides to control various pests. Dealers recommended products such as phoxim, methyl parathion, and chlorpyrifos. It's important to note that when using corn-specific herbicides like nicosulfuron and atrazine, farmers should avoid mixing them with organophosphorus or carbamate-based pesticides, and ensure a safety interval of at least seven days.
A local dealer in Wulian County reported increased sales, with farmers actively purchasing pesticides. The most recommended products include acetamiprid, imidacloprid, and chlorpyrifos, with stable pricing. For example, acetamiprid (100ml bottle) is sold at 10 yuan, and chlorpyrifos (300ml bottle) at 8 yuan. Only a few products saw slight price increases, such as dichlorvos and methyl parathion, with small increments of 10–15 yuan per box. These price changes have not significantly affected sales, and farmers seem to be aware of the adjustments.
In conclusion, the recent severe pest infestations in summer-sown corn have finally revived the pesticide market, reversing the earlier downturn and leading to a peak in drug use. This shift highlights the growing importance of effective pest management in agricultural practices.
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