Potato crop pests

Importance due to the development of pest control potato plant pests and diseases can be delayed until the results of his men certainly are not satisfactory. moreover, pests and diseases that can kill malignant potato plants.Therefore, need be done to eradicate the pest and disease management that attacks potato plants, perhaps as optimal. most pests and diseases that attack potato crops, including, as in describe below:1. Leaf roller caterpillars (phithorimaea sp.)Leaf roller caterpillars cause damage to the leaves of the potato, especially in the dry season. This pest can be eradicated with diazinon 0, 2-0, 3 percent and 75 orthene sp. percent. not only cause damage to the leaves, the caterpillars also result in damage to potato tubers in the warehouse.

MITES

Mites are eight-limbed group of small animals that are members Superorder Acarina. Different mites with insects (Insecta), but further categorized on spiders. Until now there are dozens of species of mites that have been found, but not yet stable taxonomy mites because there were many changes. In dry conditions the optimum temperature 27 ° C mite can hatch in 3 days, and become sexually mature within 5 days. The tail of the female mite can lay up to 20 eggs per day and can live for 2-4 weeks and can lay hundreds of eggs. A single female mite can reduce up to one million head of population of mites in a month's time. Very rapid rate of reproduction allows populations to adapt and resist mite pesticides, so chemical control methods become less effective when pesticides with the same active ingredient used in a long time. 

Females are diploid mite mite mite whereas males are haploid. That is, a female mite offspring from eggs fertilized by male mites, mites whereas males are descended from unfertilized eggs. When mating, the female mite will avoid the occurrence of conception in some mite eggs to produce males. The fertilized egg will produce diploid females. While the eggs are not fertilized will produce haploid males tions.Mites attack plants by piercing the leaf surface and suck the liquid. Damage due to mite infestation can not be underestimated. In addition to damaging the leaves, mites also attack the stems and fruit potential. These pests attack crops in different seasons because it has the ability to adapt in a variety of habitats, such as moss, soil, grass, and even up to the warehouse. Mites are polyfag, all kinds of plants attacked. 

Tungro disease in rice

Tungro disease symptoms are reduced tiller number and growth is stunted. Leaf blade and leaf sheath retracts. Young leaf blade that does not roll is clamped by the leaf midrib and leaves slightly twisted or curled. Leaf color turns yellow or reddish orange from the top of the old leaves. Young leaves may be spotted or striped pale green. Panicles infected plants are usually small and do not come out perfect. Grain-grain brown spots closed and weighs less than normal ears.

Infected rice plants usually live up to the ripening phase. Late flowering can cause harvest delays. Panicles are often small, sterile and imperfect existence. Plants infected parents may not cause symptoms before harvest but symptoms of an attack will be seen as singgang growing after harvest.
The younger the age of the affected plants and growing range of rice varieties, the more severe the tungro virus infection. Tungro virus disease of rice is the most important in Tropical Asia. Attacks can be very extensive crop damage in a short time.
Tungro disease in rice plants caused by tungro virus. The disease is transmitted by leaf hopper pest especially green leafhopper (Nephotettix virescens) and zigzag leafhoppers.
Actually for controlling this disease is quite difficult because the attacks are swift and spread. But there are some things you can do to control it:

• Unplug and destroy infected plants so as not to infect healthy plants.
• Rotation with crops can break the life cycle of leaf hoppers.
• Control of plant hopper attacks the right way and the best use of insecticides to control leafhoppers.

So a little post about tungro disease in rice plants may be useful for all readers. For day 12 tomorrow we are going to discuss about burning leaf disease on rice plants.