Vegetable virus disease has become severe every year in recent years, and new viral diseases have also emerged. Being familiar with the characteristics of viral diseases and understanding the laws of viral diseases are very necessary for prevention and control. Some of the special rules fo.......

Scientific name Phyllotreta striolata (Fabricius) Coleoptera, Phylloidea. Alias ​​locusts, vegetables, soil flea and so on. Distribution in addition to Xinjiang, Tibet, Qinghai, widely distributed throughout the country. P.turcmenica is mainly di.......

Osmanthus fragrans is a kind of cricket, Citrus, juvenile, if, cricket can damage the leaves and branches. The victim leaves had yellowish white spots, gradually turned gray, red spots, and in severe cases brownish like fire, withered off.

Control methods: Remove diseased leaves an.......

Aphis gossypii Glover (Cotton aphid) is a member of the order Homoptera, Polygonidae, and commonly known as honey insects and oil bugs. It is a worldwide pest and has serious damage in drought years. The main damage is watermelon, melon, cucumber and other cuc.......

Symptoms mainly affect stems, pods and petioles. The stems were infected with brown or gray-white lesions, and the black spots of the posterior disease were longitudinally arranged. Soybean meal infected with disease near the initial round brown spots, and the.......

The water is yellowish green and refreshing. It is good water. The color indicates that the shade of water is moderate and the algae in the water body are mainly diatoms, followed by green algae and bare algae.

The water is green grass and refreshing, it is a good water. The color .......

After the premature aging of cotton, the remedial measures are of little significance and emphasis is placed on prevention. From mid-July to early August, when cotton blooms and bells are in full bloom, vegetative growth and reproductive growth are well coordinated, and premature aging is .......