Chrysanthemum cut flowers main pest control

First, the main diseases 1, leaf spot disease: the pathogen of Chrysanthemum pyrethroids and Chrysanthemum pyrethroids, can occur throughout the year, especially in the warm and wet seasons from May to October the most incidence. Control methods: 1 clean up the dead leaves, timely removal of diseased leaves, concentrated burning. 2 At the beginning of the onset, spray 70% thiophanate-methyl 800-1000 times, alternately spray with 50% carbendazim or 75% chlorothalonil 800-1000 times during the onset, and spray 3-4 for 7 days. Times. 2. Rust: The pathogen is Chrysanthemum hirsutum, which is more severe in the rainy season in the April-May season and in the late autumn. Control methods: 1 timely removal of diseased plants, removal of diseased leaves, concentrated burning. 2 Before the onset of disease, spray with 80% dexamethasone 500-700 times regularly; during the onset period, spray 15% Triadimefon 800-1000 times or 25% Triadimefon 1200-1500 times, 7-10 days after spraying. -4 times. 3. Fusarium wilt: The pathogen is Fusarium oxysporum f. sp. Control methods: 1 timely removal of diseased plants, concentrated burning. 2 During the onset of the disease, 50% dexamethasone emulsion 800 times solution, or 50% carbendazim 400 times solution or 75% chlorothalonil 700-1000 times solution was alternately sprayed, and sprayed 3-4 times for 7 days. Second, the main pest 1, locusts: occurs throughout the year, with April to September, September to October for the two breeding peaks. Control methods: diligently check plant tips, bud bottoms and petals, and find that the aphids are sprayed with 10% imidacloprid wettable powder or a clean emulsion 1000-15000 times in the evening. 2. Pieris rapae (Pink white butterfly): There are larvae damage from April to October each year, but it is most severe in summer and autumn. The larvae are exclusively planted with terminal buds or shoots. Control methods: Diligently check the plants and find that the insect pests are sprayed with 20% of sweeping 1000 times liquid in time, or 5% of Ruijin special suspension powder 1000-1500 times in the evening. 3, ulnar (foot moth): will occur during the growth period, larvae occur in the mid-August, special food leaves, buds, petals. Control methods: Inspect the strains and find out that the insect pests are sprayed with 21% killing 1000 times fluid, or 1.8% abamectin 1500-2000 times fluid in the evening. 4. Aphid: Larvae appear harmful from late May to November, especially from June to September. Underground pests, larvae specifically bite chrysanthemum rhizomes, mainly in the return seedling stage. Control methods: diligently inspect plants, find pests timely use phoxim emulsion 300 ml mixed sand 25 ~ 30kg, spread appetite in the evening.

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