-
How to prevent and control spring soybean virus disease? Detailed explanation of occurrence patterns and control methods
Viral disease is a major disease of spring soybean, causing about 15% yield loss in normal outbreak years and over 50% yield loss in severe outbreak years. 1 Symptoms After spring soybean is infected, the upper leaves first show light yellow-green mottling, and the mesophyll bulges in a blister-like manner along the veins; then the mottling and wrinkling become increasingly severe, the leaves become deformed, the mesophyll protrudes, the leaf margins curl downward, plant growth is clearly stunted, the number of pods decreases, the pods are small and slender, and the pods show deformed symptoms such as flattening and bending. After infected spring soybean matures, the seeds are clearly smaller, and light brown streaks can appear on the seeds.
-
How to prevent and control pests and diseases during soybean cultivation?
I) Control of cyst nematode. 1. Strengthen quarantine and protect disease-free areas: it is forbidden to transfer soybean seeds from diseased areas. 2. Agricultural control: implement crop rotation of soybean with gramineous crops or non-host plants such as cotton; where conditions permit, paddy-upland rotation is best, and this is currently the most important
-
What are the technical measures for managing summer corn during the flowering and grain-filling stage?
The main goal at this stage is to maintain roots and protect leaves, prevent premature senescence and excessive vegetative growth, extend the functional period of green leaves, prevent grain abortion, and improve seed-setting rate and grain weight. First, apply grain fertilizer skillfully: so-called skillful application should be determined by the appearance of plants in the field. In fields where ear fertilizer is sufficient, plants look good, leaf color
-
How to cultivate and manage roses? Sharing growing experience
Cultivation site: Roses like a cool growing environment with sufficient light, and there should be at least 6 hours of sunlight per day to produce high-quality flowers. Their optimum growing temperature is 15-25°C. If the temperature is too high, it is less suitable for rose growth. In addition, good ventilation is also quite
-
Orchid cultivation experience sharing: master these key points to grow orchids well
Orchids have been one of the prominently famous ornamental flowers in our country since ancient times. Their soft and elegant leaves, quietly refined and pure white flowers, and distant and exquisite fragrance make them a treasure among flowers. There are about 500 genera and more than 10,000 species of Orchidaceae plants in our country. The orchids usually appreciated are the terrestrial orchid varieties in the genus Cymbidium.
-
How to control water during orchid cultivation
Orchids are native to mountain forests, mostly growing in clusters in places facing southeast with their backs to the northwest, and where there is plenty of stone debris and humus. Mixed coniferous and broadleaf forests provide them with shade conditions, ventilation is neither strong nor weak, and there is often air movement containing a certain amount of humidity. Stone debris and humus
-
Pest and Disease Control Methods During Zinnia Cultivation
Zinnia white star disease Symptoms: The disease occurs on leaves. Initially small dark brown spots appear, which later develop into lesions with dark brown margins and grayish-white centers, 2 to 4 mm in diameter. It mostly occurs on lower leaves, and in severe cases the leaves curl and wither. The surface of the lesions bears dark green mold-like growth. Pathogen Ce
-
Hydrangea Planting and Cultivation Experience Summary and Tips Sharing
1. Planting: In southern regions, it can be planted in the ground and overwinter outdoors; planting should be done before spring bud break. In northern regions, it should be grown in pots and overwintered indoors; planting or repotting can be done from after leaf drop until before spring bud break the following year. For the potting soil, use a thoroughly mixed growing medium of 4 parts leaf mold, 4 parts garden soil, and 2 parts river sand.
-
What are the control methods for Hydrangea ringspot virus?
[Distribution and Damage] Hydrangea (Hydrangea macrophylla), also known as bigleaf hydrangea, is a deciduous shrub planted throughout China. Viral infections are relatively common, with ringspot being the most frequent. It is generally latent; severely affected plants become stunted, with few or no flowers. [Symptoms] Leaves become crinkled,
-
Proper flower and fruit management during longan cultivation
1) Releasing bees for pollination. Longan is a dichogamous insect- and wind-pollinated flower, mainly pollinated by insects. Bees are most active within a radius of 250 m, so bee colonies are best kept dispersed throughout the orchard. For every 0.46-0.53 sq km of longan orchard, one bee colony (8-10 hives) should be provided.
条件筛选