Three major pest control methods in early autumn should be remembered

In the early autumn, the pests are serious. If the management can't keep up, it will easily lead to lower quality and lower yield. In the prevention and control measures, agricultural prevention and control should be the mainstay, and physical and chemical control should be equally important.

Bean pod

Bean pods are larvae from June to October each year. Adults have phototaxis, and eggs are scattered on tender horns, flowers and petioles. The newly hatched larvae enter the tender horns or feed, causing the flowers and horns to fall off. The older larvae plunged into the beans to feed, and the peas were often rotted after the rain. The larvae have the habit of nocturnal nights and backlights. They hide in the flowers, beans or curls during the day, and discharge the worms to block the pupils. In addition to the rainy days and sporadic activities during the day, it is generally started to climb out of the wormholes in the evening, and the outing activities will be terminated in the early morning. Its control measures are:

1. Remove the fallen leaves in the field and remove the damaged leaf and beans to reduce the source of the insects.

2. Set up black light, use the adult light tending habit, and let the trap.

3. The agent is selected from 5% fipronil 2000 times solution or 40% fenvalerate 6000 times solution, 2.5% deltamethrin 3000 times solution and the like, and is sprayed once every 10 days.

Leaf miner

When the larvae sneak into the leaves, they only leave the lower epidermis and form a tortuous tunnel, which affects the growth of the plants. The leaf miner is mainly pea, bean, cowpea, cabbage, broccoli, cabbage, rape, radish, lettuce, tomato, eggplant, potato and so on. Its control measures are:

1. Use the armyworm board to trap adults.

2. Adults mainly lay eggs on the back of the leaves, and spray the liquid to focus on the back of the leaves. When the larvae start, select insecticides that have both systemic and contact killing effects, such as 48% chlorpyrifos EC 800-1000 times solution, and spray 2 times to 3 times.

Red spider

The red spider on the bean is also called the bean leafhopper. From August to September, it is a prosperous period. If the leaves are sucked, the leaves will be shrunk and easy to fall. At the beginning of the occurrence, the leaf surface becomes red after turning green and white, and the fine mesh of the leaf back can directly see the extent and area of ​​occurrence. Immediately after the occurrence, spray a pesticide enveloping ring with a sprayer, the range of which is slightly larger than the range of occurrence, and then completely spray the plants in the encircling ring to prevent the spread of the red spider.

Its control measures are:

1. Pay attention to the monitoring of insects and find that there is a small amount of damage. The insects should be removed and burned in time. In case of drought, it is necessary to pay attention to timely irrigation and fertilization, promote plant growth and inhibit leaf aphid proliferation.

2. Use a selective acaricide for general treatment, before the pod-forming period and after the pods are harvested, with a focus on even spray on the back of the leaves. It can spray 20% compound Liuyangmycin EC 1000 times solution or 1.8% Avermectin EC 1500~2000 times solution, 15% 哒螨灵乳油 3000 times solution, 20% 甲甲脒乳油 2000倍液, etc. Pay attention to the rotation of drugs, and promote the use of high-efficiency, low-toxic biological pesticides.

More pesticide knowledge , please pay attention to China Pesticide Network

(Source: Agricultural Resources Guide)

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