Control of Diseases and pests of navel Orange
According to the general policy of "prevention first, comprehensive management", on the basis of agricultural prevention and control, according to the law of the occurrence and development of diseases and insect pests, and the rational use of chemical control, biological control, physical and mechanical control and other measures according to time and local conditions, economic, safe, effective and simple control of diseases and insect pests.
Rational distribution of agricultural control to avoid mixed planting of fruit trees with the same diseases and insect pests as navel oranges. Strengthen the cultivation management and strengthen the tree potential. Promote the ventilation and light transmission of garden groups and individuals, and create environmental conditions conducive to growth and development, so that it is not conducive to the occurrence of diseases and insect pests. Reasonable pruning, timely removal of dead branches, fallen leaves and fruits, and reduce the source of diseases and insect pests. Biological control protects and utilizes natural enemies and uses beneficial organisms to eliminate pests and maintain ecological balance.
In chemical control, we should reduce the use of chemical pesticides, control environmental pollution, advocate artificial pest control, manual control can be used without chemical control, and incomplete spraying that can be treated or picked. In prevention and control, agents with high efficiency, low toxicity, low residue and low lethality to natural enemies should be selected to prescribe the right medicine and be used reasonably. Pay attention to the quality of spraying, reduce the frequency of drug use, and use different agents alternately to delay the drug resistance of diseases and pests.
At present, attention should be paid to the prevention and control of canker, as well as rust wall lice, leaf miner and navel yellow disease. In case of rainy and low temperature, it is necessary to strengthen the prevention and control of red and yellow spiders.
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Management of Bud removal and retention in growing Pineapple
(1) when the crown bud is about 20 cm high, the upper part opens and the base narrows. When the young root appears in the leaf base, that is, when the so-called loose-tailed waist, the crown bud can be twisted clockwise for seedlings, which is called topping by fruit growers. The peak is usually from late May to June.
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High yield Management of early Fruit of navel Orange planted for three years
Navel orange seedlings must be carefully prepared to dig large holes or grooves and fertilize the foot before planting. The survival of the colonized seedlings is mainly through the following measures to promote high yield in the third year. Scientific fertilization. The navel orange seedlings planted in that year usually survive in half a month.
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