What pesticides are good for fruit trees in spring? A guide to prevention and treatment
Spring is the season when all things revive. After the ravages of a whole cold winter, all species begin a new cycle in spring. At the same time, spring is also the best time for transplanting and cultivating fruit trees. Fruit trees planted in this season survive easily, and there are relatively fewer diseases. So what pesticides are used for fruit trees in spring?
1. What pesticides are used for fruit trees in spring
In spring, before and after fruit trees bloom, it is a great opportunity to prevent and control fruit tree diseases and pests, because in this season various pathogens and pests become active after dormancy, have poor resistance to chemicals, and the leaves have not yet sprouted, so there is no obstruction, spraying is convenient, and fruit trees will not suffer phytotoxicity. A ‘medicated bath’ should be carried out in time for prevention and control. The main pesticides used include Tuzet 600-800 times liquid, pyrethroid pesticides 2500-3000 times liquid, lime sulfur mixture, crystal lime sulfur mixture, etc.
2. Methods of using pesticides in spring
Pre-flowering control: 1. Spray once with 5 degrees Baumé lime sulfur mixture, which can control fruit tree rot disease, inhibit the reproduction of overwintering red spiders, and has obvious effects on controlling leaf rollers and scale insects. You can also spray 40% asomate 100 times liquid. 2. Post-bud control. Spray the orchard once with 45% crystal lime sulfur mixture 150-200 times liquid, or spray 3 degrees Baumé lime sulfur mixture plus 50% 1605 emulsifiable concentrate 1000 times liquid, which can kill more than 90% of red spiders and the source spores of powdery mildew, leaf spot disease, etc. overwintering in buds, and can also control scarab beetles and aphids. 3. Control after sprouting and before flowering. Spray 50% 1605 emulsifiable concentrate 1500 times liquid or 80% dichlorvos 1200-1500 times liquid, or decis and pyrethroid pesticides 2500-3000 times liquid, which has obvious control effects on pests and rot disease.
Post-flowering control: 1. After flowering, continue spraying 0.3-0.5 degrees Baumé lime sulfur mixture to control leaf and fruit diseases and red spiders. You can also spray Kung Fu 2500-3000 times liquid, which can both control red spiders and kill the eggs of leaf-eating insects and fruit borers. 2. 10-15 days after flowering, spray 1:4:20 Bordeaux mixture (1 kg copper sulfate, 4 kg quicklime, 20 kg clean water), or spray 40% carbendazim or Tuzet 600-800 times liquid, which can control leaf spot disease, anthracnose and brown spot disease that easily occur in rainy and high-temperature conditions. 3. One month after flowering, the use of thiamine phosphorus and dichlorvos is strictly prohibited.
The above is some relevant knowledge about using pesticides in spring to prevent and control fruit tree diseases and pests. When spraying pesticides, protective measures must be taken to avoid pesticide poisoning.