You don't need to spray pesticides against silver leaf whitefly! Ten years' study on the effective control of Paecilomyces javanicus preparation, which is harmless to the environment

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The only biological agent for silver leaf whitefly has been published in Taiwan! In hot weather, melons and fruits are prone to the outbreak of silver leaf whitefly pests. In the case of tomatoes, because silver leaf whitefly sucks leaves, they are infected with yellow leaf roll virus, but farmers who grow organically have no medicine at all. In general, if farmers are accustomed to tomato harvesting, there is no way to control it. Therefore, Hualien Agricultural improvement Farm took ten years to develop Paecilomyces javanica preparation against silver leaf whitefly, toxicological test results are harmless to mammals and bees, and can be used during harvest.

Tip: Paecilomyces javanicus is a fungus widely found in natural environments such as soil and plant residues. After being parasitized, insects are covered with white to gray hyphae, and then produce a large number of powdery spores on the strain, which are dispersed by the wind or mechanically touched, and then infect new host insects.

Paecilomyces javanica preparation (provided by Huazaofang)

The control rate of flower-to-field test is 50% of farmers: we still need to observe the effect again.

Lin Li points out that the prevention and control rate of Paecilomyces javanica preparations in field trials can reach 50%, which is comparable to that of ordinary chemicals. With regard to the farmers' reaction to the test, Lin said that it has not yet been mass produced, and only a small number of farmers are available for trial. Half of the farmers report that the effect is very good, and hope to buy products as soon as possible. However, some farmers reported that the effect was not as good as expected, and Lin speculated that it may be because the preparation was not properly preserved, or because the environment was too dry, and the fungus did not show cotton floss after infected with silver leaf whitefly, and the farmers felt that the effect was not good to the naked eye, but the worm was actually dead.

Chen Xinzhu, a tomato farmer who actually tried it, said that the first trial was coming into winter, and with a large number of biological agents, the effect was good. However, the second trial was in summer, and the number of biological agents could only be sprayed on half of the park. I can't see the effect. She pointed out that the silver leaf whitefly grows fast in summer, and the preparation is not used continuously enough, so the actual effect needs to be observed.

Will you consider buying this preparation in mass production in the future? Chen responded, "of course I will buy it if it is effective, and I will buy it back for trial." However, she is also worried that after the technology is transferred to manufacturers, because a large number of products are made to reduce costs, it may lead to changes in bacteria or insufficient ingredients, making the biological agent ineffective instead.

Change the market: the price of microbial preparation will be a little higher, but it is acceptable to farmers.

As for the actual cost estimate, it is stated that the price of biological preparations will be higher than that of ordinary pesticides, but the price will be acceptable to farmers as far as possible. Cai Yicheng said that the key to the cost of microbial preparation lies in the back-end mass production, and the higher the technology, the lower the cost. At present, it is not possible to determine the actual cost, but it is hoped that the cost of Paecilomyces javanica preparation is similar to that of general chemical pesticides.

Lin Li pointed out that Chinese people are concerned about food safety, coupled with the Council of Agriculture's policy of halving pesticides, and hope that the newly developed green weapons will provide farmers with new choices. Tsai Yicheng said that many biological agriculture on the market are aimed at disease control, while pest control mainly uses thiobacillus thuringiensis. It has always been hoped that new biological agents can be used in organic agriculture, or even replace chemical pesticides, and are widely used in habitual agriculture.

Tsai further explained that he hopes to complete the technology transfer with the manufacturer in a month or two, and formally commercialize and sell it in a year's time, so that he can even focus on the international market and export in the future. First of all, the target market is targeted at Taiwan's 500-hectare net-room tomato garden, because of its high demand, high price of facility tomatoes, farmers pay more attention to the quality of tomatoes and high acceptance of biological agents.

In addition, Tsai also said that Paecilomyces javanica can be used not only to control silver leaf whitefly, but also to control other pests. At present, it is also developed with the Institute of drugs and drugs, and it is expected that there will be special biological agents to control aphids in the future.

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