Tomato is a very popular vegetable, in our country planting area is also relatively large, but in the process of tomato planting, tomato white snow lamp moth is a common pest, seriously affecting the income of farmers, then tomato white snow lamp moth what are the characteristics of the occurrence? What are the control methods of tomato white snow lamp moth? Let's take a look at it with the old farmers!
Tomato white light moth larvae eat leaves, and in severe cases, only leaf veins remain, which are also harmful to flowers and fruits. The larvae are earthy yellow to dark brown, dorsal line orange-yellow or grayish brown, dense brownish yellow to blackish brown long hairs.
Characteristics of the occurrence of tomato white snow lamp moth
In North China and East China, 2-3 generations occur every year, and pupae overwinter in the soil. Feathering occurs in March-April of the following spring, and is more severely affected by the second generation of larvae from August to September. Adults have phototropism, begin to lay eggs 3-4 days after feathering, and lay in clumps on the back of leaves, each piece of dozens to more than 100 grains, each female can produce more than 400 grains, after 5-6 days of incubation. The infestation of the early larvae is infested, and after 3 years of age, it begins to disperse, and it is frightened and has a suspended animation habit. The larvae are 7 years old, with a developmental period of 40-50 days, and mature on the surface of the ground to form cocoons and pupate. The second generation of mature larvae begins in September and migrates to ditch slopes, roadsides and other places to pupate for wintering.
Morphological characteristics of the tomato white snow lamp moth
White snow lamp moth, male moth wing spread 55 mm to 70 mm, female moth 70 mm to 80 mm, body white, lower lip whisker base red, section 3 black, antennal ctenophores black. The basal segments of the forefoot have black spots in red, the upper parts of the anterior, middle and posterior foot leg segments are red, the forefoot leg segments have black stripes, the wings are white without markings, the abdomen is white, the sides have red spots except for the base and terminal segments, and the back and sides have a column of black spots; the eggs are pale green; the larvae are reddish brown, the internodes are darker, densely covered with gray-yellow long hairs, the valves are white, the thorax, the ochre feet are ochre-black, and there are "V" shaped spots; the cocoon is silky, oval, black-brown; the pupal spindle is hammer-shaped, dark brown.
Tomato white snow lamp moth control method
(1) Use black light to trap adult insects.
(2) Pharmaceutical prevention and control. This insect is mostly mixed with pests such as vegetables and moths in cruciferous vegetables, and can be treated when spraying vegetables to control vegetables and moths. Spray 1000 times of 0.2% picrinolin emulsion during spawning or larval hatching. Spray 90% crystalline cypermethrin 800 times liquid or 5.7% cypermethrin emulsion 1500 times liquid, 50% octylthion emulsion 1500 times liquid, 2.5% cypermethrin 6 000 times liquid, 20% exolite 3 000 times liquid, 5% lice mite urea emulsion 1000 times liquid, 90% crystalline cypermethrin 150g plus 50% octyl thiophos emulsion 150 mL plus 30 kg of fine soil, sprinkled in the evening in an acre of land effectively.
What are the characteristics of tomato white light moth occurrence? Tomato white snow lamp moth control method