Understanding and control of 20 common pests (Part 2)
11. Bugs
Bugs mainly harm young shoots, young fruits, better control, low resistance. The time period of occurrence is from April to December, and the peak of harm is from June to August.
Prevention programmes:
1) Inulin is efficient
2) 4.5% cypermethrin 1500-2000 times
3) 90% enemy insects 1000 times
4) 5% cymofluorosilicon 2000 times
12. Twill noctuidae moths
In recent years, the twill nocturnal moth has become more and more serious, mainly harmful to young shoots, especially in the orchards where we like to plant, like the set of melons and vegetables, this insect is more numerous.
13. Vegetable moths
Vegetable moths, also known as diamond-backed moths, are of the same genus lepidoptera as twill moths, and are mostly found in orchards and eat fruit leaves.
14. Cotton bollworm
Cotton bollworms, lepidoptera, noctiaceae, widely distributed in China and around the world, mainly harmful to citrus fruits, it can burrow into the fruit, causing serious harm to the fruit.
1) Occurrence law:
Lepidoptera pests such as twill moths and vegetable moths occur annually for 4-9 generations, and seriously harm young fruits and young shoots in June-September. The pest resistance of the twill moth is relatively strong, and it must be killed before the third instar, the older the insect, the more fat is stored in the body, and the stronger the decomposition ability of pesticides.
2) Prevention and control plan: (occurrence season)
1) 5% chlorhexabenzamide 1500 times 155% chloryanide chlorpyrifos 1500 times;
2) 5.7% methyl vitamin salt 3000 times 15% cypermethrin 1500 times;
3) Can also be used 13% A vitamin indus 1000 times;
4) 2.2% methylvifloremide 1000 times 15% cyfluthrin 1500 times;
5) 600-800 times 1 billion/g of nucleotype polyhedral virus;
6) 1600 units / mg 800 times of Thunus.
3) Prevention and control points: use drugs for young insects, pay attention to rotation.
15. Butterflies
Butterflies belong to the Lepidoptera Phylum family; occurs 3-6 generations a year, pupae overwinter, overwintering adults appear in May and June, the first generation appears in July and August, and the second generation appears in September and October. Adult insects are active from March to November. The egg stage is 6-8 days, the larval stage is about 20 days, pupal is 15 days, and the overwintering pupa is about 3 months.
2) Prevention and control program:
(1) Unified placement, erasing of scattered branches;
(2) Combined with the combination of anti-leaf moth aphids and drugs;
(3) Effective drugs: inulin, methyl vitamin salt, etc.
16. Inchworm
Citrus inchworm, Lepidoptera, inchworm moth family, occurs 3-5 generations per year, pupa overwinter. The first generation starts in early May and is about one generation per month in June, July, and September. Mainly harmful to young shoots.
(1) Unified branch management;
(2) Combined with anti-leaf moth, aphids are treated with drugs and drugs;
(3) Effective drugs inulin, organophosphorus mixed with methyl vitamin salt, etc.
17. Thrips
Thrips, Thripsidae, occurs in April-October, occurs 7-8 generations per year, the eggs overwinter in the new tissues of the autumn shoots, the eggs hatch in March and April of the following year endanger the young shoots and young fruits, the flower consequences within 4 cm of the diameter are very easy to be endangered, 4-6 months, 7-9 months is the outbreak period, the early harm to the young shoots, young fruits, the late summer shoots and autumn shoots in the later stage, the occurrence of aggravated trends.
(2) Rotate medications, emphasize early medication, and unify prevention and rule;
(3) Drug formulation:
Ethyl polybactericide 2000 times decylpyridyl ether
30% pyraprofen acytilonitrile 2500 times 12.5% cypermethrin 2000 times;
Biphenylthiazepine 2000 times;
Chlorofluorothioxiazide 2000 times deca imidaclopyridoxidine 1000 times;
15% zoloftamide 1500 times 15% methyl vitamin salt 3000 times.
18. Snails
Homotype of snails, stalk ophthalmos, snails, occurs once a year, spawns in April-June, hatches in May-July, the hazard period is May-December, and May-July is the key prevention and control period.
2) Prevention and treatment of special drugs:
Sprinkle on a tray containing a luress of tetraacetaldehyde. Spray-type sprays are also available.
19. Fruit fly
Early ripening Wenzhou mandarin orange, as well as a Nanfeng mandarin orange, is more susceptible to fruit flies. This is the fruit of the fruit fly hazard, peeling there is a maggot inside, maggot maggot, which is actually a fruit fly.
Citrus fruit flies (large, small fruit flies) Diptera fruit flies, annual generation, mainly spawned inside the fruit, resulting in a large number of pre-harvest fruit fall, fruit fly hazard varieties in recent years have aggravated trend, fruit flies in the soil pupae, April-May break out, June-August began to tail spawning hazards, August-October hazard peak!
(1) Agricultural prevention and control: cleaning up the diseased fruits and burning them in a concentrated manner;
(2) Biophysical control: use of sexual attractants, lures, lure sticky board booby traps!
(3) Chemical control: 20% cypermethrin 1500... 2000 times; 20% cyfcyanidin thiamethoxam microcapsules - suspension 2000... 3000 times culling adult insects, this insect has strong flight mobility, pay attention to unified prevention!
Teacher Lu suggests:
Friends who hang lure agents pay attention, if you are the only one hanging, there is no hanging around, then I suggest you better not hang. Hanging a lure in your orchard is equivalent to "luring a wolf into the house"! Everyone around you is running to your side, so if you are the only one hanging, then I advise you not to engage in these innovative things.
If it is a unified use of a region, everyone hangs, then the effect is still OK.
20. Root nematode
Root nematodes, genus Animal kingdom, linearoid phylum, nematodes, invertebrates. In recent years, the root nematode has been somewhat deified by agricultural dealers, as long as the tree is slightly yellow, it is said that the nematode is harmful, and its realization is not as much as imagined.
1) Identification of citrus nematodes:
How to distinguish root-knot nematodes? We have to dig out the roots to see, is there a nodule? If there is a nematode, if not, healthy and healthy, it is not a nematode. Don't think it's a nematode as soon as the tree is yellow, but you can identify it yourself.
2) Root nematode species that occur mainly in citrus:
There are three species: citrus root nematodes (semi-puncture), root-knot nematodes (full punctures), and short-body nematodes (active endophytic nematodes).
3) Propagation mode: seedlings, fertilizer, rainwater, root handover
4) Prevention and control methods:
(1) Strengthen management in agriculture, seedling fertilizer and water, and enhance tree potential
(2) Biological, Rotunda pachyderma/Penicillium lilac
(3) Chemistry, thiazophos decavermectin / Lufuda (flupiramide)