3: Controlling Weeds, Pests, and Disease in .NET framework

Encoder QR Code 2d barcode in .NET framework 3: Controlling Weeds, Pests, and Disease

Many vegetable and flower varieties are resistant to mildew read package and catalog descriptions carefully Remove infected plant debris from the garden and avoid getting the leaves wet Use superfine horticultural oil or neem oil to treat infected plants Use copper- and sulfur-based fungicides as a last resort Root rots: This broad term covers a number of fungal root diseases, which cause susceptible plants to turn yellow, wilt, and sometimes die Nearly all plants are susceptible under the right conditions, such as excessive soil moisture, poor soil aeration, and wounding The fungi can survive in the soil for many years without a host Prevent root rot by building healthy, well-drained soil Microbial fungicides can help foil many root rot diseases Rust: Many different fungi cause rust, and the symptoms of this disease vary widely, depending on the kind of plant they infect Usually, the symptoms include yellow to orange spots on the leaf undersides, with white or yellow spots on the upper leaf surface Susceptible plants include brambles, hollyhocks, roses, pines, pears, bluegrass and ryegrass lawns, wheat, barberry, beans, and many more Each rust species infects a specific plant species, so that the rust on roses can t infect beans, for example Some rusts, such as white pine blister rust, have complicated life cycles and must infect two different plants in this case, white pines and Ribes species, such as currant and gooseberry Symptoms of this disease include yellow, orange, reddish-brown, or black powdery spots or masses on leaves, needles, or twigs Rust fungus is most prevalent in humid and damp conditions Provide good air circulation to keep foliage as dry as possible, remove and destroy infected parts, and keep your tools clean Plant disease-resistant varieties Slime flux: This bacterial rot inside infected trees, usually elms, maples, and poplars, causes oozing and often bad-smelling sap to run from old wounds or pruning cuts There s no control after the symptoms appear Verticillium wilt: This fungus affects many plants, including tomatoes, eggplant, potatoes, raspberries, strawberries, roses, Japanese maples, olives, and cherries Look for wilting and yellow leaves, especially older ones In some plants, the leaves curl up before falling off Prevent future infections by cleaning up all garden debris, cleaning tools thoroughly with disinfectant, and avoiding susceptible species Choose resistant varieties and practice crop rotation Viruses: This group of incurable diseases infects vegetables, brambles, strawberries, trees, and flowering plants Usually the leaves develop mottled yellow, white, or light green patches and may pucker along the veins Flowers may develop off-color patches, and fruit ripens unevenly Aphids, leafhoppers, nematodes, and whiteflies spread the virus as they move from plant to plant Viruses often live in wild bramble plants and weeds Smoking or handling tobacco products around susceptible plants can spread tobacco mosaic virus, which infects tomatoes, eggplants, peppers, petunias, and other plants Prevention is the only strategy Buy only virus-free plants and keep pests in check Eradicate wild brambles near your garden

Your gardening methods can go a long way toward keeping diseases out of your vegetable and flower patch and away from your fruits and landscape trees: Choose disease-resistant plants Many popular flowers, vegetables, perennials, turf grasses, trees, and shrubs have varieties available that resist common diseases and even some pests Mulch to reduce insects, weeds, and diseases A thick layer of organic mulch around your garden plants and shrubs keeps weeds from gaining an upper hand It also helps to maintain consistent soil moisture and temperature, which keeps plant roots healthy and better able to resist disease Choose plants that are adapted to your climate and site If your soil drains poorly, for example, don t plant shrubs that require well-drained soil Space and prune plants to provide good air circulation Fresh air helps leaves dry quickly and thwarts diseases Water the soil, not the plants Early-morning watering is best because the sun will evaporate any water on the leaves Avoid evening watering because the foliage will stay wet all night, giving fungus spores a chance to grow and infect plants Avoid working with wet plants because diseases spread easily when the foliage is wet Many diseases spread through splashed water Beans, strawberries, raspberries, and other plants are particularly susceptible Avoid excess nitrogen fertilizer Nitrogen makes plants grow fast and juicy As a result, the outer layers of the leaves and stems (similar to human skin) that protect the plant are thinner than usual and more susceptible to insect damage Keep your yard clean Dispose of diseased leaves, fruit, and wood in the garbage, not the compost pile Keep your yard tidy to discourage pests that live in dead plant debris, log piles, and other hidden places Some insect pests such as aphids, bark beetles, and tarnished plant bugs can spread diseases between plants Keep them under control, and you ll help prevent disease Inspect plants frequently You have a better chance of preventing a serious outbreak if you catch it early Look for stem and leaf wounds and damage, off-color foliage, wilting, leaf spots, and insects whenever you work among your landscape and garden plants Practice crop rotation Many insects and diseases live in the soil from one year to the next, waiting for their favorite host plants to return Foil them by planting something different in each spot each year