How to prevent and control red spider mites on greenhouse strawberries? Detailed explanation of the key technical points
Damage symptoms: Gray mold can occur at any stage from flowering to fruit development. The disease mostly starts at the flowering stage. The pathogen first infects flowers that are about to fade or weaker parts, causing the flowers to become light brown, necrotic and rotten, and producing a gray mold layer. Leaves are mostly invaded from the edges of old yellow leaves at the base, forming V-shaped yellow-brown spots, or from the petals...
Red spider mite: The main pests damaging strawberries are the red spider mite and the yellow spider mite, with the red spider mite causing the most damage. When leaves are initially damaged, small gray-white spots appear, which then gradually expand, covering the entire leaf with white patterns, yellowing and curling, and the plant becomes dwarfed and withered, seriously affecting growth. Pesticides to use: When the flower clusters first appear, spray 0.3 degree lime sulfur mixture, and spray again after seven days. Before harvest, use low-residue 20% synergized fenvalerate 5000-8000 times dilution, spray 2 times, with a 5-day interval. Note that pesticides must not be used 2 weeks before harvest.