Garlic is heavily protected against four insects.

It is well known that garlic has medicinal functions and is generally free from diseases, so it is rare to get sick. However, garlic can only inhibit the occurrence of some diseases, but can not inhibit the harm of pests. Aphids, seed flies, thrips, leaf miners and other pests should be carefully controlled to ensure the quality of garlic and improve the efficiency of cultivation.

I. aphids

The aphids that mainly damage garlic are radish aphid, cotton aphid, peach aphid and vegetable aphid, which are yellow, green, yellowish green and cherry red respectively. When the temperature is higher, it is beneficial for them to continue to breed and do harm. Because the insect can prick and absorb juice, it can cause the garlic leaves to curl and deform. If the garlic leaves are seriously damaged, the garlic leaves will die.

Prevention and cure method

1. Use 50% aldicarb wettable powder 10g / mu and spray 40kg / mu of water.

2. Spray with 40% Le Shi EC 1000-1500 times.

3. Spray with 3000 times of 20% fenvalerate EC.

2. Seed fly

Species flies, also known as ground maggots. The species fly and onion fly are the main damage to garlic. The two species of flies are similar in shape. The larvae are milky maggots with a length of 0.7-0.9 cm and 7 pairs of fleshy protuberances on the tail. The larvae damaged garlic bulbs in the ground, resulting in gradual fester of garlic tissue, yellowing of heart leaves due to loss of nutrient supply, and serious death of the whole plant.

Prevention and cure method

The main results are as follows: 1. For the fields that have been planted with maggots, all kinds of manure should be applied instead of refined organic compound fertilizer or multi-component compound fertilizer.

2. With 1000 times liquid spray of 90% crystal trichlorfon, where dead masses are found, root irrigation can be used to control.

3. Where drainage and irrigation are convenient, water can be irrigated continuously for 2 to 3 times for 24 hours each time, so that the maggots will suffocate and drain quickly after irrigation.

Third, thrips

Most of the thrips harming garlic are onion thrips, which often occur in warm and dry seasons. 6-10 generations a year. Adults and nymphs are small, yellowish or dark brown. Generally sucking juice on the leaves and sheaths of garlic, so that the color of the leaves fade and photosynthesis is blocked. It does the greatest harm to garlic which mainly eats green garlic.

Prevention and cure method

1. Spray with 40% dimethoate EC 1000-2000 times, 50 kg per 667 square meters.

2. Use 20% fenvalerate, 10 ml of fenvalerate per 667 square meters, spray 50 kg of water.

4. Leaf miner

Leaf miners produce four generations a year, overwintering as larvae or pupae in the leaves of host plants. The larvae are like small cylindrical maggots, which are mostly damaged after autumn and in April of the following year. After sneaking into the leaves, the larvae nibbled on the mesophyll, showing a gray-white curved submersible on the leaf surface, which seriously hindered the growth and development of garlic.

Prevention and cure method

1. Remove the damaged garlic leaves in the field and rett them or burn them so as to reduce the spread of insect sources.

2. Spray with 3000 times of 40% dimethoate or 2000 times of 80% dichlorvos emulsion.

3. Use a highly efficient and non-residual biological pesticide, that is, 2% suavi wettable powder, 50 grams of solution per 667 square meters and spray 50 kilograms of water.

4. Spray 2.5% deltamethrin or 20% fenvalerate 3000 times.