When this bug gets on roses, it's even more destructive than red spider mites

Roses have always been elegant and beautiful, but once pests appear there's little you can do, and the first to blame are red spider mites and fungus gnats, which spread widely and quickly. Besides these two, there's another bug that cannot be ignored, one with even greater "destructive power" than red spider mites, yet we often pay it no mind.

Apart from red spider mites and fungus gnats, what pest actually has such great "destructive power"? Unlike other pests, this bug is small in size and hard to spot at first; by the time you notice it, it has basically already multiplied into a large swarm. This troublesome bug is: the aphid. You're probably all familiar with it, so once aphids appear, how do you control them quickly and effectively to keep the plant growing healthily?

First, let's talk about what aphids are. The wingless parthenogenetic adult aphid has a body length of 2.2mm, with body colors of green, yellow-green, and brown. The tail piece is conical-round, with 6-7 curved hairs. The winged parthenogenetic aphid has a body length of 2mm, a black head and thorax, a pale green abdomen, and a smaller size. Aphids are extremely small, and their morphology is hard to distinguish.

So as long as we find dense clusters of small bugs on the tender shoots or flower buds of roses, basically in a motionless state, with a body shape similar to common aphids, we may as well treat them as aphids first, so that a moment's hesitation doesn't end up causing an aphid outbreak.

Aphids reproduce quite quickly, producing 10-20 generations per year, and they can still survive in winter. They can overwinter as eggs at the base of leaf buds or flower buds, and some parthenogenetic aphids also overwinter on rose plants. In spring, as temperatures rise, they reproduce faster and spread everywhere; in the hot summer months they decrease somewhat, but by September they appear again, so you could say they can't be killed off and can't be frozen to death.

Generally, in early spring and late autumn when temperatures are lower, completing one generation of reproduction takes about 10 days, but in summer it takes only 4-5 days, so even if aphid numbers decrease somewhat in summer, we still cannot let our guard down.

Aphids mainly feed by sucking the sap of rose leaves, and they cause serious damage especially to the tender leaves and new shoots of roses. On affected plants, the leaves turn yellow and drop off, and their excrement can also trigger sooty mold, causing deformity of flowers, leaves, and buds. At the same time, aphids are also major pests that transmit viruses.

Now that we've figured out aphids, their prevention and control becomes much simpler. If aphids appear on roses grown on a home balcony, when there are only a few you can catch them by hand, then tilt the flowerpot under a faucet and rinse the rose branches. Or coating a yellow plastic board with oil to trap and stick them is also a very good method.

When aphid numbers are large, you can choose chemical control. You can spray with acetamiprid, diluted 1500 times, and spraying 1-2 times is enough to bring them under control. If it's inconvenient to use pesticide, you can also mix your own; there are several methods, briefly described below.

(1) Take 50 grams of fresh chili peppers or dried red chili peppers, add 30-50 grams of water, boil for about half an hour, and sprinkle the filtrate on the affected plants for a remarkable effect.

(2) Take 3-4 grams of laundry detergent, add 100 grams of water, stir into a solution, then spray continuously 2-3 times with a spray bottle; the control effect is excellent.

(3) Add water to "essential balm" to make a 600-800 times solution, spray with a sprayer so that the medicine solution covers the insects' bodies. The aphid-killing effect is over 95%, and it causes no phytotoxicity to the plants.

(4) Mix laundry detergent, organic liquid fertilizer specially for roses, and water in a ratio of 1:2:800, stir into a mixed solution, then use it to spray the plants; you can achieve both pest killing and fertilizing at once.

Compared with red spider mites, aphids are easier to control, and there are also many methods; most are easily eliminated. As long as you observe carefully and use the right method, you need not fear an aphid invasion.