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A pest common to bananas
Main pests of bananas:
The hazards (banana leaf pests) are: banana peel leaf mite, twill moth, banana cross-veined aphid, banana crown reticule bug.
The hazards (banana stem pests) are: banana pseudostem weevil.
The hazards (banana root pests) are: banana rhizome weevil.
Hazards (banana flower and fruit pests) are: banana flower thrips, brown-footed horned pectoral carapace.
Pattern recognition
Prevention and control measures:
(1) In the drought and little rain, sufficient food, the occurrence of Pi's leaf mites is a critical period of prevention and control, on the basis of doing a good job of insect forecasting, timely pharmaceutical control.
(2) 1.8% avermectin 4000 times liquid, 50% mite treatment 1500 ~ 2000 times liquid, 1.8% zygostemis emulsion 2000 ~ 3000 times liquid, 15% acaricide emulsion 2000 times liquid, 8% zhongbao anti-mite emulsion 2000 ~ 3000 times liquid and other agents have a good control effect on Piscene leaf mites.
(3) Since the mite is harmful on the back of the leaf, attention should be paid to spraying the liquid to the back of the leaf when applying pesticides. Due to the short generation period, rapid development and reproduction rate of Piscene leaf mites, it is easy to form resistance to agents, and it should be used scientifically when controlling drugs to maintain its sensitivity to agents.
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(1) Adult body length 14-21mm, the whole body dark brown, , the forewings gray-brown to brown, , there are white stripes, , there are many obvious markings on the surface, , the middle of the forewing from the leading edge to the posterior edge has a gray-white broad banded twill ( ( the female insect this stripe is scattered) so called twill nocturnal moth.
(2) The mature larvae are 36-48 mm long, yellow-green to dark green or black-brown, with 1 pair of nearly half-moon or triangular black spots from the middle chest to the back of the 88th segment of the abdomen. Length 15-23mm, auburn to dark brown.
(1) Generally occurs at the seedling stage, and field inspection should be paid attention to during the seedling stage.
(2) 5% chlorpyrifos benzamide suspension, 5% methylamino avermectin benzoate microemulsion, 6% avirax benzamide suspension, bollworm nuclear polyhedral virus 2 billion pib/l and other agents can be selected.
(3) Control before the third-instar larvae.