The five prevention methods of ginkgo biloba

Cockroaches are larvae of chafers, and adults and larvae can damage Ginkgo biloba. In addition to eating the side roots and main roots of Ginkgo biloba seedlings, the root bark can also be eaten, resulting in lack of seedlings. Adults feeding ginkgo leaf can cause serious damage in the short term. Most of the chafers need more than one year to complete one generation and become adults or larvae that live in the soil. Adults live more and more, with phototaxis and suspended animation. To prevent warts, the following methods can be taken:
(1) Appropriate fertilization of manure must be fully decomposed before application, especially chicken manure, without decomposing, will induce a large number of pupae.
(2) Manually kill and kill the earthworm when it is active in the surface soil. During the period of adulthood, the adult's feign death can be used to manually kill.
(3) In adulthood, use willow, eucalyptus, 80% trichlorfon 200 times, insert a bundle every 10-15m, or soak for more than 10h in 50% monocrotophos EC 50 times. , Each acre (a mu equals 667 square meters, the same below) 5 bundles, inserted in the nursery or newly planted ginkgo biloba, trapped and killed adults.
(4) In the adult stage, spray 80% trichlorfon 800-1000 times, or 40% Dimethoate 800 times; after shaving the trunk, apply 40% omethoate EC 1-2 Leaf times, etc., to control adult worms.
(5) Apply 50% zinc thiophosphorus emulsifiable concentrate 200-250mg per acre, add 25-30kg of fine soil and mix thoroughly, spread and lightly. Or 50% zinc thiophosphate EC 250g, water 1000-1500kg, along the seedling ridge irrigation, shallow irrigation after irrigation, in order to extend the efficacy period. Use 2% methyl isophorus powder 2-3kg per acre, add 25-30kg of fine soil and mix well, spread it along the seedlings and ridges, and then cover the soil or lightly.

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