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本帖最后由 sidecloud 于 2013-8-21 13:40 编辑
家里橘子树上长了很多白点，去查怎么治，顺便看到一些常见的虫害和治疗办法，觉得很有用，拿来和大家分享一下
觉得有用的话记得给我加分，冲皮靴啦~
土里的白色虫蛹：
Curl Grubs
When digging the garden or making compost you may come across larvae that are white in colour, have a characteristic ‘C’ shape, three pairs of legs and a distinctive head and abdomen. Commonly known as curl grubs, they are beetle larvae (including Christmas beetles, cane beetles, dung beetles, flower scarabs and rhinoceros beetles). The larvae vary in size with the large rhinoceros beetle larvae (pictured) growing up to 70mm long.
The beetles lay their eggs in the soil during late spring, summer and early autumn. The eggs hatch into larvae that feed on plant roots or decaying organic matter. The larvae grow and pupate during late autumn, winter and early spring. Curl grubs are favourite bandicoot fare and small conical holes in lawns or larger excavations within gardens are the telltale signs of bandicoot activity. Wasps also parasitise curl grubs by piercing the skin and laying their eggs inside. The young wasps hatch and live inside the body, eating the non-essential tissues of the curl grub before finally emerging through the body wall of the larvae and ultimately causing its death. Larvae of the African black beetle and scarab cockchafer that attack lawns may warrant control. Drench or spray affected plants with molasses spray, use tea tree based products like Eco-Grub or spinosad sprays like Success . Repeat applications may be required during spring, summer and autumn.
治疗方法：
Molasses Spray
Dissolve one tablespoon of molasses into a litre of warm water.
Add one teaspoon of Sunlight dish washing liquid or other pure liquid soap
Spray regularly over the leaves of all plants attacked by caterpillars and other chewing pests. Caterpillars would rather starve than eat leaves sprayed with this mixture. It has also been used with success by some gardeners as a possum repellent and for the treatment of soil affected by root knot nematodes by doubling the concentration of molasses.
这个配方还能驱赶POSSUM
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柠檬树常见的大骨结：
Citrus Gall Wasp
Swollen lumps on the young stems of citrus trees signal egg-laying activity of the citrus gall wasp. The lumps on the stem enlarge as the wasp larvae grow. Eggs are laid in summer and early autumn, but young wasps will not emerge from the galls until winter. Use sharp secateurs to remove the affected stems at a leaf joint below the lump. Curious gardeners may like to cut the swollen section of stem open to view the tiny, maggot-like larvae, if only to be convinced they are the cause of the problem. Dispose of the affected stems and you will have significantly reduced next year’s population of adult wasps. It is not essential to remove old galls from attacks that have taken place in previous seasons, as the larvae will have already departed. You may however remove old galls for purely cosmetic reasons.
治疗方法：
减掉，挖掉
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蜗牛
Snails and Slugs
Everyone seems to have a home made remedy to control snails and slugs. Saucers of beer are supposed to attract them, but in my experience the beer must be home made for it to hold much appeal. Non-toxic iron-based baits are the safest of the snail and slug pellet commercially available. Thin copper bands sold through some nursery outlets and mail order companies make effective barriers. Simply place the copper around the edge of the garden bed, fixing it to timber edging or brickwork. As snails and slugs attempt to pass over the copper barrier they receive an electrical shock that repels them Poor the leftovers from your coffee plunger over areas where snails and slugs congregate. They hate caffeine!.
治疗方法：咖啡渣
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玫瑰和橘子树上的白粉虱：
White Rose Scale
Infestations of white rose scale can be particularly debilitating to rose plants, eventually killing plants completely if left unchecked. Where infestations are particularly heavy, warm soapy water and a soft scrubbing brush can be used to remove the majority of the scale. A follow up application of an oil based spray, see [Do It Yourself Controls - Oil Spray] will usually bring about control. Repeat as often as necessary. Remember to fertilise affected roses to compensate for the loss of vigour that will undoubtedly result from the scale infestation. White rose scale often multiplies rapidly during winter.
治疗方法：
Homemade Oil Spray
Mix 500ml of vegetable oil
½ cup of Sunlight dishwashing liquid or other pure liquid soap
Blend thoroughly and seal in a clean, clearly labelled jar. Store in a cool area for later use.
Dilute one tablespoon of the concentrate into one litre of water before spraying.
Oil based mixtures can be used to suffocate mites, scale and other soft bodied insects. They help to repel leaf miner moths and some gardeners even find them effective against grasshoppers. Avoid using on plants with hairy leaves and during very hot weather.
或者： YATE LIME SULFUR
IOL SPRAY 的效果很棒，效果见13楼。
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多种虫害见链接
http://www.annettemcfarlane.com/pestID.htm
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偷偷地问一声，有没有喜欢武侠小说的？ (2005-3-9) 不吃老鼠的猫 
发表于 2013-7-23 12:36
