The aphid wasp is a genus of hymenoptera, aphid wasp family, and is an important parasitic natural enemy of the whitefly nymph. The whitefly becomes a nymph to suck the sap of the leaves, fruits and young branches, and the affected leaves appear to have lost green, yellow and white spots, which spread into pieces with the aggravating spots of the damage, and then the whole leaf is pale and falls early; the flavor quality of the affected fruit is reduced, and the young fruits are seriously damaged and often fall off; the excretion of honeydew affects the photosynthesis of the plant, which can induce coal pollution; the whitefly can also spread a variety of viral diseases.
Lily aphid wasps are mainly used to control whitefly pests on greenhouse vegetables and flowers, and the effect is remarkable. Lily aphid wasps kill whitefly by parasitic whitefly nymphs or by directly feeding on the body fluids of mealyfly nymphs, and the efficacy can reach more than 90%.
How to release the best results
1. Prepare before release
Stuffy shed: Clean the countryside before colonization, the sultry shed for 15 days or the medicinal smoking shed, can kill a large number of stubble germs and pests
Insect net: Install 60 mesh insect nets in the air vents and air windows of the greenhouse to prevent the invasion of small pests such as whiteflies and aphids. It should be noted that the temperature in the shed will increase after the installation of the insect net, and the air release time can be appropriately advanced or extended, and the width of the insect net can also be appropriately increased to increase the ventilation area.
Cultivate disease-free and insect-free seedlings, do not bring pests into the greenhouse, and pay attention to disease prevention at the seedling stage.
2, How to use
Release timing: When whitefly or crops have been seen in the greenhouse for a week, the release of aphid wasps begins. Do not wait for the number of whiteflies to be large before putting it, otherwise the effect is not good and the cost is high.
Release method: When used, hang the seal directly on the upper middle branch of the plant. The wasps automatically look for whiteflies and parasitize nymphs of whiteflies.
Release volume: According to the type of facility, it is divided into two categories: "winter warm greenhouse" and "plastic arch shed".
Release 8-10 small cards (about 2000 heads) per acre, released every 7-10 days.
Winter warm greenhouses: For planting overwintering crops, they are generally released 1-2 times before winter and 2-3 times after winter (early March). A total of 3-5 releases are released throughout the growing season (about 8000-10000 heads in total).
Plastic arch: Generally spring and autumn crops. In spring, because the number of whitefly is small, release 1-2 times (about 2000-4000 heads per acre) can be. Whiteflies are abundant in autumn and need to be released 2-3 times (about 4000-6000 heads per acre).
These issues require attention
1. The aphid wasp is small in size and has limited flight ability, and the bee card should be hung evenly in the field.
2, the release time should be early, in the early stage of pest occurrence, or even after colonization without seeing pests, release aphid wasps to ensure good control results. When pests occur in large quantities or in large quantities, it is not recommended to use directly and should be used at an appropriate time after the base of the source of the pest is depressed.
3. Prevent a large number of external insect sources from entering the shed. On the one hand, when planting, try to purchase clean seedlings; on the other hand, it is necessary to ensure the tightness of the shed and install insect-proof nets at the vents.
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