Common pests of thrips, scale insects, orchids

Thrips are insects that live on plant sap and belong to the order Thysanoptera in animal taxonomy. The larvae are white, yellow, or orange, and the adults are brown or black. Eating can cause damage to leaves and flowers. Morphological characteristics thrips adult body about 1 mm long, golden yellow, we often see black on orchids. The egg is 0.2 mm long, oval and yellowish. The adults and nymphs on the back of the leaves are visible to the naked eye. Adults mostly absorb juice between leaf veins, because it is small and difficult to see, it is often ignored in production.

Shell worm

There are 6 common species of scale insects, such as blow cotton scale, camphor clam round shield scale, bran scale, Korean ball scale, mulberry white scale, Kang's pink scale and so on. The reproductive ability is strong, and many generations occur in a year. It is mainly harmful to leaves, branches and fruits, living on branches or fruits for life, resulting in yellowing of leaves, withering of branches, decline of tree potential, and easy to induce soot disease. Drug resistance is strong, general agents are difficult to enter the body, prevention and treatment is more difficult. Therefore, once it occurs, it is not easy to clean up.

Poor ventilation of orchids is easy to produce shell insects in summer, which not only affects the growth of orchids, but also affects ornamental. Usually, a small amount of available toothpicks occur and toothbrushes can be removed. Serious pests are not easy to eradicate. An orchid friend saw an article in a magazine about skillfully eliminating shell insects. Inspired, I used it to eliminate shell insects on orchids, and the effect was very good. Now introduced to Lanyou: add some edible pepper and water for 60 minutes, cool the juice and add water 100 times, spray it on the injured orchid plant with a sprayer, usually it can be eradicated twice, and the sprayer should be cleaned in time after use. Orchid friends who are interested can try it when there are scale insects.

Skillfully get rid of shell worms: use 39-degree liquor, add half of the water, spray the leaves, once every three days, twice.

With the continuous progress and development of pesticide market, the drug resistance of pests is also enhanced. Therefore, on the basis of traditional prevention and control, we should constantly look for more scientific and rapid prevention and control methods.

First, artificial control: in the process of cultivating flowers, it is found that there are shell insects in individual branches or leaves, which can be gently brushed off with a soft brush, or combined with pruning to cut off insect branches and leaves. It is required to brush clean, cut clean, focus on burning, do not throw.

Second, chemical control: according to the occurrence of shell insects, spray in the peak period of nymphs. Because at this time most nymphs hatch soon, the body surface has not yet secreted wax, the shell has not been formed, the drug is still easy to kill. Smear 1000 times the liquid of the tree general where there are eggs on the tree to asphyxiate and kill the eggs. Spray with 1000 times of omethoate, 1500 times of malathion, 1000 times of imidophos, 1000 times of 50% dichlorvos, or 3000 times of 2.5% deltamethrin. Spray once every 7 times every 10 days for 3 consecutive times. The pesticide introduced above smells bad and does great harm to people and orchids. Over the years, I have been using self-made Lanjieling to kill scale insects, the effect is obvious, the effect is long.