Heart rot symptoms: At the beginning of the disease, the celery heart leaves and veins turn brown, and the leaf margin cells gradually become necrotic, showing a dark brown color, and finally the heart rots. This is a physiological disease caused by calcium deficiency. The continuous cropping plots do not pay attention to the use of calcium fertilizers; rain water loses the effective calcium in the soil; the plants have too much nitrogen, lack of water supply or root rot, root knot nematode disease, and the roots cannot absorb calcium normally. All these factors can Cause calcium deficiency. Control methods: Apply fertilizer with high calcium content; timely watering and pest control; find calcium deficiency, spray foliar fertilizer in time, and spray 0.2% potassium dihydrogen phosphate once every 20 days. . Boron deficiency symptoms: abnormal petiole at the beginning of the onset of hypertrophy, shortening, and bending to the inside; curved part of the inner surface of the tissue becomes brown, gradually cracked, petiole twisted and chapped, severe when the edge of the young leaf browning, heart and leaf necrosis. This is a physiological disease caused by boron deficiency. In many regions, due to the long-term monoculture of crops requiring large amounts of boron, the effective boron content in the soil is low, and the lack of attention to boron fertilizers is more common. Control methods: Apply 1 kg of multi-element boron fertilizer per acre as basal fertilizer before sowing, and spray 0.2%~0.3% of multi-element boron fertilizer solution 2~3 times in the early stage of growth. Symptoms of black rot: Symptoms often occur at the base of the root and petiole, and sometimes at the root. The disease department became black and rot, and many black spots were born on it. Plant growth was stagnant, and the outer 1 or 2 layers of leaves fell off due to rot in the base. The disease is a fungal disease. Control methods: In addition to the prevention and treatment through the selection of disease-resistant varieties, seed treatment, scientific management and other agricultural measures, in the early onset can be used 50% thiophanate-methyl WP 500 times or can be killed (77% copper hydroxide wettable powder ) 500 times spray control. Paracetamol,Analgin,Ibuprofen,Phenacetin Paracetamol,Analgin, Phenacetin Shandong Chenyi Environmental Protection Technology Co.,Ltd , https://www.chenyichemistry.com
Celery heart browning coping therapy
The phenomenon of browning in heart of celery may be caused by many reasons. According to the clear cause of symptoms and symptomatic treatment, the ideal control effect can be achieved.