Ladybugs are the natural enemies of aphids, adult ladybirds can eat about 2,000 aphids a day, ladybug eggs beige, rice grain size, neatly and orderly arranged on the back of plant leaves, the fastest reproduction in late April to May every year, if the worms eggs begin to eat aphids, until feathering (adult insects), most pepper farmers only know adult insects, do not know the larvae of different ages, think that they are pests, blindly use pesticides, causing aphids to die, resulting in aphid flooding, that is, wasting time, and consuming funds, and can not produce good results. The following is illustrated with pictures to avoid mistakes in the future:
The picture above is an adult worm.
Pictured above is a nymph about to be feathered.
The left side of the picture above is a second-instar nymph, a first-instar nymph that is the same shape as a second-instar nymph, but the back is not yellow, and the tail is crocodile-like.
How to protect predators
For peppercorn trees, the following must be done:
First, postpone the time of Qingyuan to the bud stage, which not only completely eliminates the grasshopper shell insects that harm the pepper tree, but also ensures that there is no aphid hazard during the full flowering period (the pesticide used in Qingyuan is still in the expiration date).
Second, after the pepper flowers have shed flowers (fissioned), use the pesticide again before the hard grains.
Third, into May (that is, pepper seed shell has been lignified) peppercorn hard grains, there are ass worms on the tree can not use pesticides (the reason is very simple, there is no aphid on the tree, natural enemies will not go, this is the earthworm on the fish hook, no earthworm fish will not be hooked), if used until the pepper is ripe, but also can not ensure that your pepper fruit is not black.
A few points to explain:
First, the flower bud period clears the garden, ensuring that there is no aphid hazard during the full flowering period, and if the flowering period is harmed by aphids, it can be said that the particles are not harvested.
Second, the young fruit stage is harmed by aphids, which is easy to cause a large number of fruit drops, so it is necessary to use drugs.
Third, peppercorns can not be used after hard grains, aphids harm fruit is limited, coupled with natural enemies on the tree to do sanitation workers on the tree, the peppercorns you produce are definitely high-quality goods.
,, this is not a nonsense to take it for granted, I have been doing peppercorn trees since the 1990s, I have treated an aphid pesticide to scare people, the above practice is my practice over the years and reached the conclusion, last June sprayed persimmon garden, there are several pepper trees in the garden by the way also sprayed, the medicine is not used up, and the medicine sprayed six points of the pepper tree, the result is all black, the other acres of pepper trees are not medicated but complained.
We are the origin of the Weibei drought, may also be due to changes in the conditions of the site, you may wish to try a small piece or a single plant and then decide whether to adopt or not, for reference.