Current farmers are most used abamectin to control spider mites and thrips, because of long-term use, pest resistance is enhancing, the effect is no obvious.
The spring comes, the weather gets warmer, shed indoor pests also on the rise. In recent years, the more serious greenhouse pest are mites in spring, spider mites and thrips, and because of in spring the shed indoor temperature increased, the reproductive capacity of these pests are strong, easily concealed, it can be said that it is more difficult to kill. Vegetables in the spring is the period to increase production, these pests if not prevent and treat timely will affect the normal growth of vegetables.
Current farmers are most used abamectin to control spider mites and thrips, because of long-term use, pest resistance is enhancing, the effect is no obvious. Then in addition to avermectin, what kind of agent can kill spider mites and thrips effectively?
Spirodiclofen: mainly inhibit mite fat synthesis, blocking the energy metabolism of mites, to various developmental stages of mites are effective, including eggs. Broad spectrum, strong adaptability: to red spider, yellow spiders, yellow tea mite, carmine spider mite and two-spotted spider mite, etc. have a good control effect, ovicidal effect is particularly outstanding, to the immature nymphs also have good contact action. Although it can not kill the female mites quickly, but to female mites, it has a good sterilization effect. After female mites trigger the drug, 96% of the eggs can not hatch, died in late embryonic stage. The application time was recommended in the early stage of spider mite damage, March to May of every year, or before the second peak infestation, that is applied in the early September and October.
B mite azole: To vegetable mite, two-spotted spider mite, carmine spider mite and other mites have an excellent control effect. Its mode of action is to inhibit the formation of mite eggs and embryos from larva to adult mite molting process, to eggs and larva are effective, to the adult mites are invalid. Best application time: due to the B mite azole’s mode of action is to inhibit embryogenesis and the molting process of larva to adult mites, so its best control time is the beginning of mites damage, that is when each blades have fewer eggs and larva. In addition, due to B mite azole can not directly kill the mites, so when mites damage is serious, you can mix with other acaricide which can control mites.
Love card mites: its mechanism of action is inhibiting the mites central nervous conduction system propalanine receptors. To various life stages of mites are effectively, with ovicidal activity and knockdown activity to adult mites. And have long duration. The duration time is 14 days or so. For long-term use Propargite, Azocyclotin generating resistant mites no cross-resistance, the effect is significant. Use in the late spring and early summer (temperatures above 25 degrees), persistence was up to 40 days or more. In late April to early May, diluted 6000-fold evenly spray, when the mite population density is larger, suggest to mix with Azocyclotin and other fast-acting acaricide.
Nitenpyram: nitenpyram is an efficient, broad-spectrum, new neonicotinoid insecticide, and its mechanism is mainly role in the insect nerves, to insects axis synaptic receptors has nerve blocking effects. Has low toxicity, high efficiency, long duration, excellent suction effect, permeation characteristics. Have excellent control effect on thrips, also have a good activity on pests that generate resistance to traditional insecticides, can effectively prevent a variety of sucking mouthparts pests. Use less, low toxicity, long persistence.
Spinosad: belongs to the antibiotics series pesticides, with fast contact and stomach poison effect on pests, to the leaves have a strong infiltration effect, can kill pests under the skin, longer duration, to some pests have killing eggs effect. Can effectively control Lepidoptera, Diptera and Thysanoptera pests, the control effect on sucking pests and mites is poor. Spinosad products controlling thrips, spray on the emergence period, focus on young tissues such as flower, young fruit, top and shoots and other parts.
Source:http://www.cospcn.com
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