The control of melon wilt disease
Melon wilt disease is also called wilt disease, which is a fungal soil-borne disease. It is only a melon crop, and watermelon and cucumber are the most serious diseases, followed by melons. Melons can develop throughout the reproductive period. The typical symptom of the disease is that the initial part of the injured plant wilts drooping at noon, and it seems to be deficient in water. It can be restored sooner or later or on rainy days. The number of wilting leaves is increasing, the whole plant is wilting, sooner or later it cannot recover, and it soon dies, the rootstock is cut off. The vascular bundle becomes brown.
The severity of the disease depends on the amount of pathogenic bacteria in the soil and the environmental conditions. High humidity in the soil, water accumulation in the roots, and high temperatures are conducive to disease occurrence. Rainy weather after rain or when the weather is fine when the weather conditions are more common. Flood irrigation, partial nitrogen fertilizer, continuous cropping is conducive to disease. From late April to mid-May, the county has more rainfall, more rainfall, more days when the weather is rainy, and the field water is heavy. The meteorological conditions are very conducive to the occurrence of melon wilt disease, hope the majority of melon farmers strengthen Field inspections, catching good weather, and using medicine to prevent and treat it.
Prevention:
1. Agricultural control: Rotate crops with non-guad crops, strengthen field cultivation and management, increase plant resistance, and remove diseased plants in time.
2, seed disinfection: first soaking with 50-60 °C warm water soaking for 20 minutes, and then 50% carbendazim WP 100 times soaking 30-40 minutes, rinse germination.
3, chemical control: before the onset or early onset of mu 50% fast Keling 1200-1500 times or 50% thiophanate-methyl WP 500-600 times or 50% carbendazim wettable powder 500- 700 times liquid irrigation and control, control once every 7 days, continuous control 2-3 times.
SPA-100 Ophthalmic A-Scan/Pachymeter with macular recognition function, can accurately measure axial length, anterior chamber depth, lens thickness, as well as intra-ocular lens calculation.
And also with the central area and the peripheral areas gain automatic compensation capability, accurate measurement of central and peripheral corneal thickness, is widely used in the preoperative examination and postoperative effect evaluation of refractive surgery.
A scan probe: 10MHz import small size probe, built-in luminotron
Measuring range: 15mm-40mm
Measurement precision: ±0. 05mm; with macula lutea trace function
Measurement: Anterior chamber depth, lens thickness, vitreous body length, total length and average
Method of measurement: immersion and contact
Eye mode: Phakic/ Aphakic/Dense/ various IOL
IOL formula:SRK-II.SRK-T.BINKHORST- â…¡.HOLLADAY.HOFFER-Q.
HAIGIS
Enter the name & ID; easy to check archive
Storage: 10 cases, 5 readings each case
Output: A scan waveform and IOL calculation sheet
P scan probe: 20MHZ, angle of 45 degrees makes easier operation
Resolution: 5um
Measuring range: 150um~1500um
Display: SINGLE mode and MAP mode
Can display ultrasound waveform when measuring
Each group is the average of 20 measurements
Switch between IOP measured value and actual value
Can input name, ID and operator`s name
Others:
Large color liquid-crystal screen
Touch screen input, easy operation
Curve freezing: Manual/Auto mode, controlled by pedal
Built-in speed thermal printer
A/P Ophthalmic Scanner,Eye Ultrasound Scanner A Probe,Ophthalmic With Pachymeter Ap Probe,A Ophthalmic Diseases Check Ultrasound
Guangzhou Sonostar Technologies Co., Limited , https://www.sonoeye.com