At present, pear blossoms are opening up everywhere, forming a sea of flowers. The spring breeze gusts, and tens of thousands of pear blossoms sway gently while filling the air with a fragrant aroma. This attraction has led to many tourists walking through the greenery to enjoy the flowers and feel the beauty of nature.
However, pests such as leaf mites and pear small insectivores, as well as diseases such as rot disease, rotiferous, and black star disease, are occurring quietly. Among them, the two-spotted leaf mite is the most common.
The two-spotted leaf mite, also known as the white spider, is a worldwide pest mite. It has the characteristics of spitting silk knotted net, lively, living in groups, crawling and spreading between nets, and is prone to a large number of outbreaks and rampant harm.
Two-spotted leaf mite mainly harms the leaves, sucking sap on the back of the leaf, the affected leaves first appear pale spots from both sides of the main vein near the petiole, with the aggravation of the hazard, the leaves appear into small white green-losing spots, and later become gray-white and gray-brown, weaken or completely lose photosynthesis, the leaves are scorched and fall off early.
Therefore, in the process of pest control in pear orchards, it is necessary to pay more attention to the effect of leaf back medicine, and plant protection machines that can be sprayed on the back of foliar leaves should be selected for operation.
Pear trees bloom in mid-April. After the overwintering mite emerges, it feeds on the leaves of the inner part of the crown, and then gradually spreads to the periphery and lays eggs. The first generation of eggs is at its peak in early May. June to August is the peak of the mite infestation throughout the year.
Why focus on the control of two-spotted leaf mites?
1. The subsequent temperature gradually increases with the month, and the high temperature will lead to the acceleration of the reproduction rate of the two-spotted leaf mite.
The most suitable temperature for the development of two-spotted leaf mites is 21~35 degrees, the relative humidity is 35%~55%, overwintering female adult mites begin to lay eggs to the first generation of young mites hatching peak period takes 20~30 days, subsequent generations overlap, with the increase of temperature reproduction accelerated, under 23 degrees to complete the generation of 13 days, 26 degrees to complete the generation of 8 9 days, above 30 degrees to complete the generation of 6~7 days.
The large number of eggs and short cycle of single mites are important reasons for the rapid spread and spread of two-spotted leaf mites.
2. The host is widespread, and if it is not prevented in time, it will expand the scope of transmission.
Dispotted leaf mites are multi-host pest mites, and their host species and wide range, affected by the symbiosis of the host at the same time, frequent transfer and migration, and difficult prevention and control, are also one of the reasons for the large occurrence.
Therefore, it is necessary to choose plant protection machinery with high operating efficiency, while seizing the key nodes of spraying, ensure the effect of plant protection operations, and effectively carry out pest control.
The LJ Tech multi-functional orchard robot has 12 groups of dual-bore nozzles, which can be adjusted 360° angle and 180° fan-shaped coverage to hit the medicine without dead ends. At the same time, the orchard robot has 16 liters of mailbox, supporting continuous operation for 6 hours. 450 liters of large-capacity medicine box, a single box of medicine can be sprayed for half an hour.
