Be careful of these leafy pests

Do not arbitrarily increase the drug concentration, the number of days between spraying should strictly enforce the general chemical control disease, every 6-7 days, spray agents, pest 10-15 days, spray; note spraying quality, all parts should be sprayed, not be missed, particularly the lower leaves. Requires positive and negative spraying, spray on the leaves but also negative, must not be careless, or ineffective; using 2,4-D dip dip flower anther to pay special attention, concentration can not be large, it can not be repeated dip flowers, or fruit teratogenic, if not careful 2,4-D sprayed on the leaves, even small concentrations, there will be injury, Ye Zicheng chicken feet shape.

To comply with pesticide safety interval because there are residues of pesticides, drugs can not fight today, tomorrow harvest vegetable market, so in the vegetable harvest spraying pesticide safety interval must pay attention to the different requirements of pesticide safety interval is not the same. For example Kui parathion pesticide safety interval is 14 days; zineb, mancozeb, carbendazim interval is 15 days; dimethoate, trichlorfon, metalaxyl (metalaxyl), triadimefon, one hundred bacterial clearance,pressure sprayers g mites PL pesticide interval of 7 days; phoxim, dichlorvos, speed kill small, thiophanate and other pesticides interval 5 days; Fosetyl pesticide interval of three days.

More choice of Protected Vegetable Pesticide smoke or dust protected because humidity, but with smoke, dusts pesticides to control pests without adding water, will not increase the humidity, the effect is good; cloudy, rainy as usual control, the effect is not affected. The spraying liquid is different, must choose sunny, otherwise the effect is not good. And the use of smoke or dust Pesticide labor, residues are generally not exceeded, the application of the protective benefits of a lot of vegetables.

Watched the sky, spraying liquid medication seedlings generally choose sunny, no wind (or wind very, very small) weather. perfume sprayer High temperature, the concentration should be appropriately reduced in order to avoid injury (in particular the protection of vegetables). Some pesticides (such as some organic phosphorus) used when the temperature is high efficacy increased. Miao hour, spraying fluid volume should be reduced, but not high concentrations, because tender seedlings easy to produce injury. Some vegetables sensitive to certain drugs, such as the 50% drop of aldicarb pesticide use on cucumber, 300 times with injury, 500 times without injury, but 500 times in cabbage using it to produce injury. Therefore, the concentration necessary to reduce the use of cabbage, requiring 800 times more.