More and more fruit farmers feedback: red spiders are always "dead", easy to recur, why? As we all know, citrus red spider eggs are generally laid on the back of the leaves and in the grooves of the branches, which are in the blind area of drug application, and most of the acaricides do not have systemic conductivity, and the drug will not have an effect without directly touching the worm eggs.
Figure 1: Citrus tree red spider lays eggs in grooves and at angles between branches
"Can't die, rebound fast" is often labeled by farmers as "no effect of medicine", throwing the pot to agricultural dealers, but most of it is caused by personal operations. The specific performance is as follows:
First of all, in order to seek the effect of killing mites, the fruit farmer does not use it according to the recommended concentration, and increases the use multiple without authorization. In the long run, this leads to increased barrier effect of the epidermis of red spiders, enhanced detoxification metabolism, reduced sensitivity to agents, etc., and ultimately leads to increased resistance.
Secondly, the timing and habits of medication are not good. The best time to control red spiders is 3-8 mite eggs per leaf, missing the best time to prevent and control "half the work"; spraying should be evenly sprayed on the front and back, and the inner chamber should be sprayed in place; it can improve the prevention effect.
Figure 2:Key nodes in the control of red spiders: the end of March, the end of August and the qingyuan
Third, long-term single medication leads to increased drug resistance. When controlling pest mites, we try to avoid the continuous use of acaricides of the same ingredient, and rotate acaricides with different mechanisms of action to save labor and money.
Table 1. Mechanism of action of different acaricides, acaricidal morphology and temperature sensitivity
<col>
Acaricides
For patterns
Temperature sensitivity
Mechanism of action
mineral oil
Adult mites, eggs
Not warm
Physically enclosed
Alkyne mites
Mites
Above 20 ° the effect is good
Mitochondrial atp synthase inhibitors
Triazoltin
Summer eggs, young mites
Above 22° the effect is good
Pyridoxine
Adult mites, winter eggs
Mitochondrial electron transport chain inhibitors
Spironyl esters
ovum
Good effect at high temperatures
Inhibits the synthesis of mite fats
Thiamine
Eggs, nymphs
Inhibits mite growth and development
Butfluoromethate
Eggs, adult mites
Mitochondrial respiratory suppressants, inhibit egg hatching
Biphenylhydrazine ester
Inhibits the central nervous system
Ethosazole
Eggs, juvenile mites
Good effect at low temperatures
Tetazole mite nitrile
Eggs, mites, adult mites
Succinate dehydrogenase inhibitors
Today, I would like to recommend the economic plan of Tianhe mite killing: "Li orange (ce resveratine)+" Mite quick-acting, antibiotic-free, long-term management package program.
Figure 3: Tianhe""Li Orange +" mite killing scheme
Using a variety of Chinese herbal medicines as raw materials, Li Orange uses TCM co-extraction technology (ce) to extract the active and synergistic ingredients of acaricides, and the synergistic effect of other acaricides is significant.
Jiu Jiu'an (Avi Phendintin) has a wide spectrum of mites, and has a good anti-effect on adult mites, young mites, nymph mites and rust ticks, which is positively correlated with temperature and has better effect in the high temperature range.
Figure 4. Effect of lisquat + aviphenetine tin drug half an hour later
Lison 800 times + avermectin. Ethosazole 2000 times: in the citrus germination stage, flowering stage, young fruit stage, color transition period are safe to use, after 1 day of application, it was found that the red spider poisoning death, the dead insect rate of up to 95%, the control effect is better than the conventional plan. The use of the scheme in the early stage of the occurrence of mites can greatly reduce the base number of mites and the cost of prevention and control, which is a set of safe, labor-saving and money-saving schemes, and the effect has been recognized by many large growers.
Fig. 5. Effect of limeberry (ce verricorine) + avivine ethyrazole after 24 hours
According to the experiment of Zhejiang Citrus Research Institute, for orchards with a large base of red spiders (about 65 heads/leaves), 99% mineral oil + 0.5% veratene was applied, and the red spiders had good quick-acting properties one day after the drug. The results of the survey within the 21st and 30th days showed that the number of mites on the blade was small, and the anti-efficacy was about 90%, and the scheme also had good effectiveness.
Figure 6.0.5% resveratine + 99% mineral oil Citrus Research Institute test report
"Tianhe Li Orange +" mite control program to control red spiders to see the base of red spider mites, egg generation to determine the control plan, the base is small in the case of the best control. If the mites have more than 10 heads/leaves and more than 10 eggs/leaf, it is necessary to use 750 times to control the following plan.
Table 2. Tianhe "Li Orange +" resistant pest mite management plan