1. Fear of the enemy
Stone fruits (there are cores inside, and pulp on the outside, such as peaches, plums, cherries) and kiwifruit are very easy to produce medicinal damage, causing a large number of leaves and fruits, do not use.
Corn is very susceptible to drug damage, beans, melon seedling stage is very sensitive, resulting in burning seedlings, do not use.
Rice is used in high temperature weather before ear extraction, causing the leaves to turn yellow and white, so use with caution.
Remarks: Dichlorvos has a touch killing, stomach poison and fumigation effect, strong knockdown on pests, rapid efficacy, but short duration of action, smelly, volatile, the higher the temperature, the faster the volatilization. It is difficult to prevent pests such as whitefly and thrips mixed with 1000 times that of the enemy, and the effect is very obvious. 800 times irrigation root anti-ground tiger, yellow curved strip jumping insect beetle, the effect is better. The safety interval for vegetables is 5 days and tea is 6 days.
Symptoms of dichlorvos:
2. Chlorpyrifos
Melon (especially watermelon), lettuce seedling stage use, 100% medicinal harm. Melon vines should also be used with caution after 1 meter long, encountering high temperatures will burn leaves and drug spots, tobacco is very sensitive at any time. The Chinese herbal medicine clover green is sensitive at any time, causing all the leaves to fall. Sensitive to grapes, use with caution.
Chlorpyrifos drug infestation symptoms:
3. Triazolium
Sugarcane, corn, and russet white are easy to produce medicinal harm and should not be used.
Symptoms of triazolium drug harm:
4. Malathion
Tomato seedlings, melons, beans, cherries, grapes, and pear trees are more sensitive, and use concentrations with caution.
The short interval between the use of herbicide 2methyl 4 chlorine and malathion (within 10 days) is very susceptible to drug harm.
5. Propyl bromophos
When the concentration is high, it has medicinal harm to melons and beans; cruciferous vegetables are prone to drug damage during the flowering period. It is not suitable for application in orchards, which is easy to cause leaf aging, a large number of flowers and fruits, inferior fruits and other hidden drug damage.
6. Enemy insects
It is particularly sensitive to corn and beans, and is prone to drug damage, and peach trees are prohibited. When the concentration is high, the application of high temperature weather also has yellowing drug damage to the leaf tip of rice
7. Alkyne mite / gram mite
The concentration is too high for the young leaves of citrus new shoots, which is easy to produce medicinal harm, and the concentration is best not less than 2000 times, which is particularly obvious in the grapefruit drug damage.
Kermat pear tree is very sensitive and disabled. Excessive dosage produces yellow stripes or irregular rings on citrus fruits, and the use of high temperature fruits is easy to harm
Melons and beans are used at a concentration of less than 3,000 times at the seedling stage (less than 25cm), which is prone to drug damage.
Symptoms of argyne mite damage:
New leaf burns
New leaf burn curl
Brown spots after burns
Fruit medicine spots, affecting fading greening
8. Triazoltin
Under low temperature conditions, it is easy to cause medicinal damage to the young leaves of spring shoots, which seriously causes a large number of flowers, leaves and fruits.
When the temperature is below 20 °C, citrus is used in the young fruit stage, resulting in deformities in the leaves and young fruits.
Symptoms of triazole tin citrus:
The fruit medicinally harms the oil ring spots
Causes a large number of fallen leaves
Triazoltin and alkyne mite mixture:
Drug hazards of triazoltin and desen manganese zinc mixture:
Black spots appear infestation
9. Organophosphorus main emulsion dosage form
Such as (chlorpyrifos, marathon, oxidized fruit), etc., in the temperature of more than 30 °C in the high temperature and drought season, the young leaves of citrus appear wrinkled, deformed medicinal damage, the fruit has striped spots medicinal damage
Organophosphorus emulsion citrus drug symptoms:
The new leaves are wrinkled and curled, deformed
High temperature high dose burns the fruit
10. Motor oil
Under the high temperature of summer, high concentration is very easy to cause medicinal harm to citrus and other fruit trees.
Can not be mixed with sulfur-containing agents (Bacillus, Grammydan), copper preparations (Bordeaux liquid), gram mites and so on.
Symptoms of motor oil drug harm:
Motor oil drugs harm black and brown spots one piece after another
Mineral oil is used at high temperatures to harm little by little irregular black spots
11. (Thiazinone) chlorpyrifolide
Chlorpyrifos is very sensitive to cabbage and radish, and when sprayed on the leaves, brown spots and leaf bleaching occur immediately.
12. Insecticidal double
It is easy to cause medicinal harm to cruciferous vegetables such as cabbage and kale and citrus.
Summer heat used on citrus can cause yellowing of leaves and fruits.
13. Fluridine (inhibition) fluoleamide
It is sensitive to the seedling stage of cabbage, and it is easy to cause new leaf burning drug damage
Fluoleonylurea / butyl etherurea, in high humidity, high temperature above 30 °C using high concentration (higher than the recommended double liquid), encounter strong light irradiation, crop seedlings are prone to drug harm.
14. Imidacloprid
In the melon and bean seedling stage is more sensitive, in the high temperature, high humidity greenhouse conditions of the use of melon has the risk of burning new leaves, use with caution.