How to control pests and diseases in litchi fruit

There are many kinds of litchi pests and diseases, among which the major diseases in the fruit period are: Phytophthora capsici and anthracnose; the main insect pests are: litchi, elephant caterpillar, litchi, locust, cockroach, small grey butterfly, and fruit sucking nightgrass. The time of the main damage is the young fruit period and the fruit ripening period. Therefore, appropriate prevention and control measures should be formulated to ensure the comprehensive prevention and control of pests and diseases.

First, the young fruit period will focus on the prevention and control of litchi, elephant lice, phytophthora capsici, litchi, pupa and so on. Stink bugs (falling adults and nymphs) sucking young fruit, or hit the urine to injure the skin, causing fruit drop; tinea worms feed on the seeds, and finally cause the fruit to fall off, and other pests are also the result of falling.

Control methods:

The first is chemical control. In the young fruit period, about 10% in mid-to-late April, 100% of Decoction can be used 2000 times, or 48% of Losby 1000-fold, and 64% of anti-virus can kill 600 times. If there is a severe orchard, 40% of dicofol can be added. 1000 times, spraying pests and disease prevention can also be combined with spray fruit protection agent (Gutri Ling or Litchi Paulownia), both to protect fruit and prevent insecticide.

The second is biological control, protection and use of various pest natural enemies in the natural world to control the number of pest populations. For example, flat-bellied wasps can be artificially propagated, and flat-bellied wasps can be used to prevent litchi and stink bugs. Generally, each tree has an elephant-like image 150 Head, can be placed flat abdomen wasp 600 head, such as the density of insect population, or tall crown, can be appropriate to expand the amount of bees. If the density of insect population is large, it should be combined with chemical control and biological control, that is, spray insecticide first, and then release the bee every few days.

Second, the prevention and treatment of fruit development at the end of the period reduces pests and worms. In the late development of litchi fruit, special attention should be paid to the occurrence of Pythium aphanidermatum and locust worms, especially when the fruits are turning color or near mature. Prevention and control of Phytophthora capsiciomycetes can be sprayed once a week or so before fruit ripening. It can be used as 600 times or 600 times as much as thiram Mn-Zn, or Kelu 800 times. According to the forecast and prediction of locusts, the timing of seizures when the adult eclosion rate reaches 40% Start spraying; repeat the spray every 5-7 days. Be sure to eliminate the pests before spawning. In general years, early maturing species from the end of April to the beginning of May, mid-season maturing species in the middle and late May, and late maturing species in the early June, that is, fruit coloring and coloring period, are the key time for locust control. Attachment: commonly used pesticides litchi commonly used pesticide name and dosage form control object use concentration 90% trichlorfon litchi lice 1:800 40% water amine phosphorous phosphonium, ulmes, sharp moths 1:1000 25% quinoxime locust , Tip-on moths, etc. 1:800-1000 25% Insecticide bihydrate Aphids, tipping moths, etc. 1:500-600 10% Decapterol Aphids, tipper moths, etc. 1:500-600 10% cypermethrin Cinnamon locusts, tipped moths, litchi pods, etc. 1:2000 10% PepsiCo Emulsion 1:2000-2500 10% Xingmianbao Emulsion 1:2000-2500 50% Tolke 1:2000 -2500 80% Dichlorvos, Monochamus alternatus, etc. 1:800-1000 40% Dimethoate locusts, crickets 1:800 40% Leopoldis locusts, tipping moths, crickets, etc. 1:1000 24% Valentino Aphids, tipping moths, tapeworms, etc. 1:1000 40% dicofol 瘿螨 1:800 40% methylisothiphos underground pests, (germ mosquitoes) 1:1000 64% anti-virus Aphis gourd 1:500-800 90 % Phospho-aluminium Phytophthora blight 1:400 50% thiophanate-methyl anthrax 1:800-1000 30% strong oxygenated copper Phytophthora capsici, anthrax 1:500-600 70% dew wet cream Phytophthora 1:750