Hello everyone, I am a plant grass worm, love greening love to raise flowers, today some netizens asked, only a month of rhododendron potted leaves have been gray, flower friends to see is the red spider?
Knock on the key: rhododendron is difficult to raise, especially indoor maintenance, rhododendron slightly do not pay attention to the yellow leaves, mainly related to the environment, rhododendron likes warm and humid environment, mainly to ventilate and breathe, there is a pot soil to meet the acidic environment, which is also a lot of gods recommend that before raising rhododendrons, first learn to match the soil, otherwise everything is useless.
Let's take a look at the pictures provided by netizens:
As you can see from the image above:
Netizens' rhododendron leaves have been gray, zoom in to see the insect feces directly, these insect dung is the source of the outbreak of coal pollution, of course, netizens only maintain a month, a month of time like this, indicating that the netizens bought the azaleas originally have problems, and is the pot soil directly with insects caused by infection, this situation, to make the azaleas blossom pot, I think it is still difficult.
Rhododendron leaves that have only been raised for a month are already gray? Military insects to understand
In fact, the symptoms of the leaves of the azaleas of netizens are very common, many flower friends think that it is a bug and a red spider, in fact, it is not, the harm characteristics of red spiders and ticks are still different, the situation on the picture is a typical military insect hazard characteristics, it is estimated that 90% of flower friends are not familiar with military insects, here and everyone simply share.
Rhododendron crown reticulated bugs, that is, we often say that the main hazards of military insects are that adult insects and nymphs cluster leaf backs, suck sap, the affected leaves are densely covered with small white spots, green, and the serious ones are pale, and there are often a large number of black-brown insect feces and yellow mucus on the back of the leaves, so that the leaves look gray, seriously directly drop the leaves, and these mucus will cause the harm of pathogens.
How to control cuckoo reticulated bugs? In fact, it is very simple, you can use permethrin pesticides such as cypermethrin, cypermethrin, enemy killing, nicotinic pesticides such as imidacloprid, acetamidium, and avermectin, methyl vitamin salt, oxidation of leguo, etc. Broad-spectrum insecticides can be, generally spray once can kill 99%, the egg period is about 15 days, insurance can be sprayed again every 15 days, even spray 2 to 3 times, spray time is best in the evening after the sun sets, the leaves on both sides should be sprayed, of course, prevention is also very important, It is recommended that the potting soil must be disinfected and insecticidal eggs treated.