Showing posts with label Plant Pest. Show all posts
Showing posts with label Plant Pest. Show all posts

Tuesday, February 9, 2016

Kisah Si Ulat Bulu

Pic: Google

Caterpillar aka ulat beluncas.... adik beradik dia.. ulat bulu.....
memang x asingla dari hidup kita kann..

sapa aje yg x kenal makhluk ni? ramaiiiii sangat yg takutkn makhluk ni.. esp kaum hawa...

kita semua suka tengok rama2.... cantik menawan hamba allah yg satu ni... siap yang rajin berkebun tu... tanam banyak2 pokok yg boleh menarik rama2...

tapi mungkin kita tak berapa sedar... bila rama2 banyak di kebun kita... anak2nya pun ramai la juga....

anak2nya??/ of course ulat beluncas & ulat bulu itu adalah anak2 si gorgeous tu... eheh....

& kita.. sedaya upaya pula akan cuba buang/ hapus anak2 si gorgeous ni... geli dowhhh...... dah la tu... ulat2 bulu tu pula... memang bawak penyakit gatal2 satu badan bila terkena kulit...
 

hmm..... kesian juga dgn si rama2 ni.... ibunya kita nak.. tapi anaknya dibenci... apa nak buat..... kan.. mesti sibeluncas & ulat bulu berbulu dengan manusia pasal ni kan... double standard!
Pic: Google


source: http://www.ipm.ucdavis.edu/QT/lfcaterpillarscard.html

Caterpillars story

Caterpillars, the larvae of butterflies and moths, damage plants by chewing on leaves, flowers, shoots, and fruit and sometimes by boring into wood. Caterpillars in fruit or wood can be difficult to manage: they are hidden most of their life and can cause serious damage even when numbers are low.

However, many plants, especially perennials, can tolerate substantial leaf damage, so a few leaf-feeding caterpillars often aren’t a concern. Handpicking and natural enemies often provide sufficient control.
Pic: Google
Early detection and removal prevent excessive damage.
Look for feeding holes, excrement, webbed or rolled leaves, caterpillars, eggs, and natural enemies.
Prune off rolled or webbed leaves, and handpick caterpillars from plants, destroying the insects by crushing them or by dropping them into soapy water.

Pic: Google
Caterpillars have many natural enemies.
Beneficial insects and other organisms often prevent caterpillar numbers from rising to damaging levels.
Most caterpillar species have several species of parasitic wasps or flies that attack them. Look for parasite cocoons next to caterpillars, darkened caterpillar eggs, or exit holes in dead caterpillars.
General predators include birds, assassin bugs, lacewings, predaceous ground beetles, and spiders.
Naturally occurring diseases caused by viruses, bacteria, or fungi often kill caterpillars.

Pic: Google
Pic: Google 

Pic: Google
Pic: Google


Pic: Google
Pic: Google


Less toxic insecticides are available:
Use insecticides only when damage is becoming intolerable, nonchemical methods haven’t worked, and smaller caterpillars are present. Avoid insecticides that can kill beneficial insects, and don’t treat butterfly garden plants, because you’ll kill the caterpillars that will become butterflies.
Bacillus thuringiensis subspecies kurstaki (Btk) is a microbial insecticide that kills only caterpillars. It’s safe to use near bees, beneficial insects, and wildlife. Caterpillars must feed on treated leaves to be affected. Because it’s most effective on small, newly hatched caterpillars and breaks down rapidly, treatment timing is critical.

Spinosad is a safe microbial-based insecticide but it can have some negative impacts on beneficial insects.


Some common leaf-feeding caterpillar species:





Beet armyworm is a common pest on vegetables and flowers. Yellowstriped armyworm is similar but dark with yellow and orange stripes.



A parasitic wasp lays her egg in an armyworm. The egg will hatch into a larva that will feed inside the armyworm and kill it.




Tobacco hornworm on tomato. Note its excrement on the leaf below.



The western tussock moth feeds on many ornamental and fruit tree species.




Leafrollers, such as this fruittree leafroller, feed inside leaf rolls secured with silk and, when disturbed, often drop to the ground, hanging from a silken thread.



The cabbage looper has three pairs of prolegs in the back and a reduced number in the middle, causing it to move in its typical looping pattern.




Fall webworms feed in groups within silken tents. Many tent caterpillars create similar nests. Prune these out and destroy them.



Egg cluster and newly hatched larvae of the redhumped caterpillar. As these larvae mature they will develop a bright red hump just behind their head.

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benci2 kat si beluncas & si bulu ni... ramai jugak yg suka main or makan si beluncas & bulu ni kan...
:-p


Pic: Google
Pic: Google

Pic: Google
Pic: Google

Pic: Google



Tuesday, January 26, 2016

Know Your Plant Pest For Better Control

copypaste article from: http://bestplants.com/know-your-plant-pest-for-better-control/

happy reading!

know-plant-pest-06302015
When controlling any plant pest you need to know the type of insect to give the right control. Knowing the difference between nocturnal (night feeding) and diurnal (day feeding) insects will help you solve many problems.

Night Feeders
For example. when a plant’s leaves get more ragged every day, but you can’t see anything on the leaves causing the troubles… suspect a night chewer. There are lots of them.
Snails, slugs, earwigs and cutworms – notorious garden enemies – all night feeders. To double-check the diagnosis, take a flashlight and inspect the plant at night after 10 PM if possible.
Look carefully through the plant, on the ground beneath it, under and over leaves. You’ll probably find the culprits.
Chewing and Sucking Insects
tomato-caterpillar-06302015
You probably know of two kinds of insects in terms of the way they feed on plants:
  • Chewing insects that cut holes in leaves – caterpillars, grasshoppers, beetles, earwigs, snails and slugs (which aren’t insects but might as well be).
  • Sucking insects that push their pointed snout mouth parts into plant tissue and suck out juices – aphids, scale insects, white flies, mites.
It’s easy to get the impression that all sucking insects are small like aphids and mites and that all chewing insects are large like caterpillars and earwigs.
But this is not necessarily so. The squash bug, chinch bug, and some of the stink bugs are the size of your little fingernail – large as insects go – yet they are sucking insects.
Their mouth parts work the same as the much smaller aphids, white fly, and mites. On the other hand, some chewers are quite small; the black flea beetle that chews leaves is less than 1/4 inch in diameter.

Rolled-up leaves

The leaf that is rolled, puckered, or twisted out of its normal shape is a plant doctor’s delight.
With few exceptions, you are almost sure to find the cause if you examine it carefully.
Some caterpillars make it and art form and their specialty of leaf rolling. When you unroll a leaf, expect first to find a little, green, hairless caterpillar on the inside.
This is a leaf roller. You have to blast the leaves with a spray application in order to get it inside where the worms are.
If there are just a few such rolled leaves pick them off, throw them in the garbage, and be done with it.
You may find certain kinds of aphids inside a rolled leaf.
No matter what the color, aphids are always identifiable by their soft, almost transparent bodies, big abdomens (the round, rear section of the body) with tiny prong-like things on the back end, and six legs.
The leaf rolling aphid can be controlled with specific sprays but it takes a strong jet of spray. ln order to prevent re-infestation (outdoors), mark your calendar to spray during the late dormant season.

Etched leaves

Do the leaves contain transparent window-like sections or etched trails through the green?
The etched trails are caused by leaf miner, a small worm that tunnels inside the leaves just under the surface. Hold such a leaf to the light and you might even see one of the worms inside the trails.

Lack of Vitality

In the case of trees or large shrubs, a general lack of vitality can be caused by borers in the trunk and branches.
Examine the bark closely. You may find little holes, perhaps with sap oozing out. Those are the signs of borers, little larvae that bore their way into the wood.
For control spray the whole tree and the soil surface around the tree. With so many new chemicals on the market… check with your county agent for the best treatment options for your area.

Mildew and Other Diseases

powdery-mildew-06302015
The most frequent plant disease you will find is powdery mildew. It’s gray, has a powdery and mealy feeling under your thumb.
Other diseases are generally limited to just a few kinds of plants. You will find descriptions and controls for the serious ones with a quick search of the web.

Poor Plant Care

Leaves that are discolored but reveal absolutely no small insects on the undersides when examined closely with a magnifying lens and show none of the symptoms mentioned above are probably suffering from a physiological trouble.
This is the time to ask yourself about the plant`s environment and care. Any of these causes are possible:
  • Too much or too little sun
  • Too much or too little water
  • Too much or too little fertilizer
  • Wrong kind of fertilizer (the plant may need more nitrogen and less phosphorus and potassium, or some other adjustment in the nitrogen | phosphorus | potassium balance)
  • The plant may need iron (ask locally about this — it’s usually a general neighborhood problem)


Root Problems

Sometimes a plant will become wilty and appears ready to die but shows none of the symptoms mentioned up to this point.
If that’s the way things are, you have only one place left to suspect – the roots.
Gophers could be eating the roots, moles could have dislodged the plants, or any of a number of soil insects could be feeding in the roots.
Dig into the soil and look at the roots, using a hand lens if necessary. Of all possible disorders of plants the initial cause is most often poor drainage.
Waterlogged soil reduces air in soil, encourages mold, rotting, decreases beneficial bacterial activity. Poor drainage may cause build-up of toxic salts from fertilizers and water.