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Why do some herbicides work fast and others work slowly?
Why is there a difference between herbicides that work fast and those that work slowly, and what is the reason? Is there a netizen who can explain? General herbicides can be divided by their translocation within the plant into two types: systemic and contact. After a systemic herbicide is absorbed by a weed, it moves laterally and vertically through the weed's vascular tissue...
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What medicine works well to improve the fruit set rate of grapes?
What medicine is good for improving the fruit set rate of grapes? What other methods can improve the fruit set rate of grapes? We also ask netizens with grape-growing experience to help introduce this. Growing grapes has good economic benefits. However, due to the influence of variety factors and adverse factors such as temperature, humidity, light and water, grapes often have poor fruit set, resulting in...
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What insecticide works well for controlling the rice stem borer (Chilo suppressalis)?
What insecticide should be used against the rice stem borer? Please note that controlling the rice stem borer also depends on the natural enemy situation in the paddy field. There are many natural enemies that parasitize the rice stem borer, mainly the egg parasitoid Trichogramma, the larval parasitoid Cotesia, and predatory natural enemies such as spiders. When the number of natural enemies is large, the control threshold can be appropriately relaxed. Commonly used control agents include Bai...
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On which crops does ethephon work well?
Which crops does ethephon work on? Please explain. Ethephon is an organophosphorus broad-spectrum low-toxicity plant growth regulator that promotes ripening. It can enter the plant through leaves, bark, fruit and seeds, then be transported to the site of action, where it releases ethylene. It can promote fruit ripening and coloring, promote leaf and fruit...
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What herbicide works well for weed control at the corn seedling stage?
What herbicide is good for weed control at the corn seedling stage? Please note that using Yunongle herbicide at the corn seedling stage gives very good weed control results. Yunongle is also called nicosulfuron, and its formulated product is a 4% suspension concentrate, with a dosage of 1.5 liters of 4% Yunongle suspension concentrate per hectare. The specific application method is as follows: 1. Application timing: 3-5 leaves after corn emergence...
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Which herbicides work well in corn fields?
Which herbicide is best for corn? And how should it be applied? Summers are rainy, and weeds are widespread in corn fields. The main weeds include crabgrass, barnyardgrass, green foxtail, goosegrass, redroot pigweed, purslane, copperleaf, and purple nutsedge. Corn is most severely harmed by weeds at the seedling stage, so chemical weed control should...
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What herbicide works well in napa cabbage fields?
Currently, the herbicides registered in China for napa cabbage include 33% pendimethalin emulsifiable concentrate (100-150 ml per mu), applied as a soil treatment after sowing but before emergence, or before transplanting the cabbage; it can control some grasses and broadleaf weeds. If using pendimethalin over a large area, it is advisable to test on a small area first. For soil treatment...
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What is effective for controlling diamondback moth? Bacterial insecticides work well
The diamondback moth appears year-round, and bacterial insecticides can be cleverly used to control it effectively. Against diamondback moth and other lepidopteran pests, bacterial insecticides give good control. There are many varieties of bacterial insecticides, and in China the top recommendation is high-efficiency Bt, namely Bacillus thuringiensis. The commonly used dosage is 8000 international units/ml per mu,...
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What insecticide works well to control the rice leaf roller?
What insecticide should be used to spray the rice leaf roller? Please give an introduction. The rice leaf roller's occurrence is characterized by early immigration, many peak generations, and large moth numbers, with the fifth (3rd) and sixth (4th) generations occurring continuously and severely, causing heavy natural damage. Because current high-yield cultivation uses large amounts of nitrogen fertilizer in the late stage, plus the expansion of direct-seeded rice, machine-transplanted rice and other cultivation areas, the rice growth period is delayed...
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What specific pesticides work well for controlling aphids?
What specific pesticides are there for controlling aphids?
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