There are 21 species known to be harmful to oranges, of which Papilioxuthus L. and P.polytes L. are heavier. They belong to Lepidoptera and Papilionidae. The host is mainly Rutaceae, with the most severe damage to citrus, in addition to yellow skin, carrots, pepper, pepper and cumin.
Intestinal localization was administered to reduce adverse effects.
Targeted site-specific release:
Two
hours in gastric juice will not disintegrate or crack, dissolve within
thirty minutes of disintegrating juice, providing a perfect solution for
protein and peptide drugs and probiotics.
Enteric
coated gelatin hollow capsule is made of gelatin and enteric coating
material in gastric juice it will not collapse, but will release in the
intestines as a collapse of a target product . It is often used for
special packaging of drugs and health cae products which are irritating
to the stomach or unstable under acid, or dissolved and effected in the
intestine.
Intestinal location administration can improve the
efficacy of drugs, reduce the dose and the adverse reaction, brings the
convenience to patients. Moreover , it can avoid the degradation of
gral protein, polypeptide or health care products and provide the best
absorption sites for them.
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What are the hazards? The larvae bite on the leaves, resulting in nicks and holes, and even the entire leaf is eaten, leaving only the petiole, the greatest impact on the growth and crown formation of seedlings and saplings.
Morphology? Citrus Papilion, also known as the orange yellow black butterfly, the adult is a large butterfly with yellow-white markings, there are two types of spring and summer. Spring-type female adults are 21 to 28 mm in length and 75 to 96 mm in wingspan, summers are larger in size, 30 mm in length, and 105 mm in wingspan. The body and wing are yellow at the bottom, and the black portion is less than the spring-type one. There are 8 meniscus and 6 meniscus maculas on the outer wings of the spring and summer adult wings and the hind wings. The larvae are brown at first, green after being cooked, 38 to 42 mm in length, and yellow stinky glands on the head.
Habits: In southern China, two kinds of Papilioides occur from 5 to 6 generations in a year, and their generations overlap, so that they spend their winters in sheltered places. Its habits and larvae habits are similar. Adults are active during the day, fly well, like to eat nectar, eggs scattered on the buds, leaves on the back, the egg period of about 7 days. Newly hatched larvae bite leaves into holes or nicks. The 5th instar larvae have the largest food intake, and they can eat 5 or 6 leaves a day. When they are scared, they stick out of the horny glands and release odors to avoid enemy enemies. The mature larvae can spin silk around the thorax to immobilize the shoots. Overwintering adults in the following year appear from March to April. Adults of the first to fifth generations appear in late April to May, late May to late June, late June to July, August to September and October to November respectively. It is wintering in the sixth generation. There are many kinds of bees and other natural enemies.
Control methods
1, manual killing. In combination with winter and spring pruning clear garden to kill overwhelming insects; net catch adult; catch larvae; remove eggs.
2, protect the use of natural enemies. Protect Trichogramma, egg and larvae parasitizing Trichogramma, gold wasp, broad leg wasp.
3, killing larvae. Grasp the 90% trichlorfon crystal 800 times, or 2.5% enemy kill, 20% quick kill, 4,000 to 5,000 times the chlorinated oil, or 2.5% chlordecose 20% Liquid, or 10.8% Caesar EC 1 000 to 1 500 times, or Bt emulsion 2 000 to 3 000 times, Pneumococcus wet powder (100 billion/g) 1 000 times, and Qingcui No. 6 liquid 1 500 Double fluid.